Abstral Sublingual Tablet

Components:
Fentanyl
Fentanyl
Method of action:
Analgesic (Opioid), Anesthetic, Gonadotropic, Pain Reliever, Sedative
Analgesic (Opioid), Anesthetic, Gonadotropic, Pain Reliever, Sedative
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Name of the medicinal product

Abstral Sublingual Tablet

Qualitative and quantitative composition

Fentanyl

Pharmaceutical form

Sublingual tablet

Therapeutic indications

The information provided in Therapeutic indications of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Therapeutic indications in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Management of breakthrough pain in adult patients using opioid therapy for chronic cancer pain. Breakthrough pain is a transient exacerbation of otherwise controlled chronic background pain.

Dosage (Posology) and method of administration

The information provided in Dosage (Posology) and method of administration of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Dosage (Posology) and method of administration in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Abstral Sublingual Tablet should only be administered to patients who are considered tolerant to their opioid therapy for persistent cancer pain. Patients can be considered opioid tolerant if they take at least 60 mg of oral morphine daily, at least 25 micrograms of transdermal fentanyl per hour, at least 30 mg of oxycodone daily, at least 8 mg of oral hydromorphone daily or an equianalgesic dose of another opioid for a week or longer.

Method of administration:

Abstral Sublingual Tablet sublingual tablets should be administered directly under the tongue at the deepest part. Abstral Sublingual Tablet sublingual tablets should not be swallowed, but allowed to completely dissolve in the sublingual cavity without chewing or sucking. Patients should be advised not to eat or drink anything until the sublingual tablet is completely dissolved.

In patients who have a dry mouth water may be used to moisten the buccal mucosa before taking Abstral Sublingual Tablet.

Dose titration:

The object of dose titration is to identify an optimal maintenance dose for ongoing treatment of breakthrough pain episodes. This optimal dose should provide adequate analgesia with an acceptable level of adverse reactions.

The optimal dose of Abstral Sublingual Tablet will be determined by upward titration, on an individual patient basis. Several doses are available for use during the dose titration phase. The initial dose of Abstral Sublingual Tablet used should be 100 micrograms, titrating upwards as necessary through the range of available dosage strengths.

Patients should be carefully monitored until an optimal dose is reached.

Switching from other fentanyl containing products to Abstral Sublingual Tablet must not occur at a 1:1 ratio because of different absorption profiles. If patients are switched from another fentanyl containing product, a new dose titration with Abstral Sublingual Tablet is required.

The following dose regimen is recommended for titration, although in all cases the physician should take into account the clinical need of the patient, age and concomitant illness.

All patients must start therapy with a single 100 microgram sublingual tablet. If adequate analgesia is not obtained within 15-30 minutes of administration of a single sublingual tablet, a supplemental (second) 100 microgram sublingual tablet may be administered. If adequate analgesia is not obtained within 15-30 minutes of the first dose an increase in dose to the next highest tablet strength should be considered for the next episode of breakthrough pain (Refer to figure below).

Dose escalation should continue in a stepwise manner until adequate analgesia with tolerable adverse reactions is achieved. The dose strength for the supplemental (second) sublingual tablet should be increased from 100 to 200 micrograms at doses of 400 micrograms and higher. This is illustrated in the schedule below. No more than two (2) doses should be administered for a single episode of breakthrough pain during this titration phase.

Strength (micrograms) of first sublingual tablet per episode of breakthrough pain

Strength (micrograms) of supplemental (second) sublingual tablet to be taken 15-30 minutes after first tablet, if required

100

100

200

100

300

100

400

200

600

200

800

-

If adequate analgesia is achieved at the higher dose, but undesirable effects are considered unacceptable, an intermediate dose (using the 100 microgram sublingual tablet where appropriate) may be administered.

During titration, patients can be instructed to use multiples of 100 microgram tablets and/or 200 microgram tablets for any single dose. No more than four (4) tablets should be used at any one time.

The efficacy and safety of doses higher than 800 micrograms have not been evaluated in clinical studies in patients.

In order to minimise the risk of opioid–related adverse reactions and to identify the appropriate dose, it is imperative that patients be monitored closely by health professionals during the titration process.

During titration patients should wait at least 2 hours before treating another episode of breakthrough pain with Abstral Sublingual Tablet.

Maintenance therapy:

Once an appropriate dose has been established, which may be more than one tablet, patients should be maintained on this dose and should limit consumption to a maximum of four Abstral Sublingual Tablet doses per day.

During the maintenance period patients should wait at least 2 hours before treating another episode of breakthrough pain with Abstral Sublingual Tablet.

Dose re-adjustment:

If the response (analgesia or adverse reactions) to the titrated Abstral Sublingual Tablet dose markedly changes, an adjustment of dose may be necessary to ensure that an optimal dose is maintained.

If more than four episodes of breakthrough pain are experienced per day over a period of more than four consecutive days, then the dose of the long acting opioid used for persistent pain should be re-evaluated. If the long acting opioid or dose of long acting opioid is changed the Abstral Sublingual Tablet dose should be re-evaluated and re-titrated as necessary to ensure the patient is on an optimal dose.

It is imperative that any dose re-titration of any analgesic is monitored by a health professional.

Discontinuation of therapy:

Abstral Sublingual Tablet should be discontinued immediately if the patient no longer experiences breakthrough pain episodes. The treatment for the persistent background pain should be kept as prescribed.

If discontinuation of all opioid therapy is required, the patient must be closely followed by the doctor in order to avoid the possibility of abrupt withdrawal effects.

Use in children and adolescents:

Abstral Sublingual Tablet must not be used in patients less than 18 years of age due to a lack of data on safety and efficacy.

Use in older people:

Dose titration needs to be approached with particular care and patients observed carefully for signs of fentanyl toxicity .

Use in patients with renal and hepatic impairment

Patients with kidney or liver dysfunction should be carefully observed for signs of fentanyl toxicity during the Abstral Sublingual Tablet titration phase .

Contraindications

The information provided in Contraindications of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Contraindications in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Patients without maintenance opioid therapy as there is an increased risk of respiratory depression.

Severe respiratory depression or severe obstructive lung conditions.

Treatment of acute pain other than breakthrough pain.

Special warnings and precautions for use

The information provided in Special warnings and precautions for use of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Special warnings and precautions for use in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Patients and their carers must be instructed that Abstral Sublingual Tablet contains an active substance in an amount that can be fatal to a child, and therefore to keep all tablets out of the reach and sight of children.

Due to the potentially serious undesirable effects that can occur when taking an opioid therapy such as Abstral Sublingual Tablet, patients and their carers should be made fully aware of the importance of taking Abstral Sublingual Tablet correctly and what action to take should symptoms of overdose occur.

Before Abstral Sublingual Tablet therapy is initiated, it is important that the patient's long-acting opioid treatment used to control their persistent pain has been stabilised.

Upon repeated administration of opioids such as fentanyl, tolerance and physical and/or psychological dependence may develop. Iatrogenic addiction following therapeutic use of opioids is rare.

In common with all opioids, there is a risk of clinically significant respiratory depression associated with the use of Abstral Sublingual Tablet. Particular caution should be exercised during dose titration with Abstral Sublingual Tablet in patients with chronic obstructive pulmonary disease or other medical conditions predisposing them to respiratory depression (e.g. myasthenia gravis) because of the risk of further respiratory depression, which could lead to respiratory failure.

Abstral Sublingual Tablet should only be administered with extreme caution in patients who may be particularly susceptible to the intracranial effects of hyperkapnia, such as those showing evidence of raised intracranial pressure, reduced consciousness, coma or brain tumours. In patients with head injuries, the clinical course may be masked by the use of opioids. In such a case, opioids should be used only if absolutely necessary.

Cardiac disease

Fentanyl may produce bradycardia. Fentanyl should be used with caution in patients with previous or pre-existing bradyarrythmias.

Data from intravenous studies with fentanyl suggest that older patients may have reduced clearance, a prolonged half-life and they may be more sensitive to the active substance than younger patients. Older, cachectic, or debilitated patients should be observed carefully for signs of fentanyl toxicity and the dose reduced if necessary.

Abstral Sublingual Tablet should be administered with caution to patients with liver or kidney dysfunction, especially during the titration phase. The use of Abstral Sublingual Tablet in patients with hepatic or renal impairment may increase the bioavailability of fentanyl and decrease its systemic clearance, which could lead to accumulation and increased and prolonged opioid effects.

Care should be taken in treating patients with hypovolaemia and hypotension.

Abstral Sublingual Tablet has not been studied in patients with mouth wounds or mucositis. There may be a risk of increased systemic drug exposure in such patients and therefore extra caution is recommended during dose titration.

There should be no noticeable effects on cessation of treatment with Abstral Sublingual Tablet, but possible symptoms of withdrawal are anxiety, tremor, sweating, paleness, nausea and vomiting.

Serotonin Syndrome

• Caution is advised when Abstral Sublingual Tablet is coadministered with drugs that affect the serotoninergic neurotransmitter systems.

The development of a potentially life-threatening serotonin syndrome may occur with the concomitant use of serotonergic drugs such as Selective Serotonin Re-uptake Inhibitors (SSRIs) and Serotonin Norepinephrine Re-uptake Inhibitors (SNRIs), and with drugs which impair metabolism of serotonin (including Monoamine Oxidase Inhibitors [MAOIs]). This may occur within the recommended dose.

Serotonin syndrome may include mental-status changes (e.g., agitation, hallucinations, coma), autonomic instability (e.g., tachycardia, labile blood pressure, hyperthermia), neuromuscular abnormalities (e.g., hyperreflexia, incoordination, rigidity), and/or gastrointestinal symptoms (e.g., nausea, vomiting, diarrhoea).

If serotonin syndrome is suspected, treatment with Abstral Sublingual Tablet should be discontinued.

Effects on ability to drive and use machines

The information provided in Effects on ability to drive and use machines of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Effects on ability to drive and use machines in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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No studies on the effects on the ability to drive and use machines have been performed with Abstral Sublingual Tablet.

However, opioid analgesics are known to impair the mental or physical ability to perform potentially hazardous tasks such as driving or operating machinery. Patients should be advised not to drive or operate machinery if they become dizzy or drowsy or experience blurred or double vision while taking Abstral Sublingual Tablet.

This medicine can impair cognitive function and can affect a patient's ability to drive safely. This class of medicine is in the list of drugs included in regulations under 5a of the Road Traffic Act 1988. When prescribing this medicine, patients should be told:

• The medicine is likely to affect your ability to drive

• Do not drive until you know how the medicine affects you

• It is an offence to drive while under the influence of this medicine

• However, you would not be committing an offence (called 'statutory defence') if:

o The medicine has been prescribed to treat a medical or dental problem and

o You have taken it according to the instructions given by the prescriber and in the information provided with the medicine and

o It was not affecting your ability to drive safely

Undesirable effects

The information provided in Undesirable effects of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Undesirable effects in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Undesirable effects typical of opioids are to be expected with Abstral Sublingual Tablet; they tend to decrease in intensity with continued use. The most serious potential adverse reactions associated with opioid use are respiratory depression (which could lead to respiratory arrest), hypotension and shock.

The clinical trials of Abstral Sublingual Tablet were designed to evaluate safety and efficacy in treating patients with breakthrough cancer pain; all patients were taking concomitant opioids, such as sustained-release morphine, sustained-release oxycodone or transdermal fentanyl, for their persistent pain. Therefore it is not possible to definitively separate the effects of Abstral Sublingual Tablet alone.

The most frequently observed adverse reactions with Abstral Sublingual Tablet include typical opioid adverse reactions, such as nausea, constipation, somnolence and headache.

Tabulated Summary of Adverse Reactions with Abstral Sublingual Tablet and/or other fentanyl-containing compounds:

The following adverse reactions have been reported with Abstral Sublingual Tablet and/or other fentanyl-containing compounds during clinical studies and from post-marketing experience. They are listed below by system organ class and frequency (very common ≥ 1/10; common ≥ 1/100 to < 1/10; uncommon ≥1/1,000 to <1/100; not known (cannot be estimated from available data)). Within each frequency grouping, undesirable effects are presented in order of decreasing seriousness.

System Organ Class

Adverse Reaction by Frequency

Very common

≥ 1/10

Common

≥ 1/100 to < 1/10

Uncommon

≥1/1,000 to <1/100

Not known (cannot be estimated from available data)

Immune system disorders

Hypersensitivity

Metabolism and nutrition disorders

Anorexia

Decreased appetite

Psychiatric disorders

Depression

Paranoia

Confusional state

Disorientation

Mental status changes

Anxiety

Euphoric mood

Dysphoria

Emotional lability

Disturbance in attention

Insomnia

Hallucination

Nervous system disorders

Dizziness

Headache

Somnolence

Amnesia

Parosmia

Dysgeusia

Tremor

Lethargy

Hypoaesthesia

Sleep disorder

Convulsion

Eye disorders

Vision blurred

Cardiac disorders

Tachycardia

Bradycardia

Vascular disorders

Hypotension

Respiratory, thoracic and mediastinal disorders

Dyspnoea

Oropharyngeal pain

Throat tightness

Respiratory depression

Gastrointestinal disorders

Nausea

Stomatitis

Vomiting

Constipation

Dry mouth

Mouth ulceration

Gingival ulceration

Lip ulceration

Impaired gastric emptying

Abdominal pain

Dyspepsia

Stomach discomfort

Tongue disorder

Aphthous stomatitis

Swollen Tongue

Diarrhoea

Skin and subcutaneous tissue disorders

Hyperhidrosis

Skin lesion

Rash

Pruritus allergic

Pruritus

Night sweats

Increased tendency to bruise

Musculoskeletal and connective tissue disorders

Arthralgia

Musculoskeletal stiffness

Joint stiffness

Reproductive system and breast disorders

Erectile dysfunction

General disorders and administration site conditions

Fatigue

*Drug withdrawal syndrome

Asthenia

Malaise

Flushing and hot flush

Peripheral oedema

Pyrexia

Injury, poisoning and procedural complications

Accidental overdose

Fall

* opioid withdrawal symptoms such as nausea, vomiting, diarrhoea, anxiety, chills, tremor, and sweating have been observed with transmucosal fentanyl

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via Yellow Card Scheme: www.mhra.gov.uk/yellowcard

Overdose

The information provided in Overdose of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Overdose in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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The symptoms of fentanyl overdose are an extension of its pharmacological actions, the most serious effect being respiratory depression, which may lead to respiratory arrest.

Management of opioid overdose in the immediate term includes removal of any remaining Abstral Sublingual Tablet sublingual tablets from the mouth, physical and verbal stimulation of the patient and an assessment of the level of consciousness. A patent airway should be established and maintained. If necessary an oropharyngeal airway or endotracheal tube should be inserted, oxygen administered and mechanical ventilation initiated, as appropriate. Adequate body temperature and parenteral fluid intake should be maintained.

For the treatment of accidental overdose in opioid-naïve individuals, naloxone or other opioid antagonists should be used as clinically indicated and in accordance with their Summary of Product Characteristics. Repeated administration of the opioid antagonist may be necessary if the duration of respiratory depression is prolonged.

Care should be taken when using naloxone or other opioid antagonists to treat overdose in opioid-maintained patients, due to the risk of precipitating an acute withdrawal syndrome.

If severe or persistent hypotension occurs, hypovolaemia should be considered, and the condition should be managed with appropriate parenteral fluid therapy.

Muscle rigidity interfering with respiration has been reported with fentanyl and other opioids. In this situation, endotracheal intubation, assisted ventilation and administration of opioid antagonists as well as muscle relaxants may be requested.

Pharmacodynamic properties

The information provided in Pharmacodynamic properties of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Pharmacodynamic properties in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Pharmacotherapeutic group: Analgesics; Opioids; Phenylpiperidine derivatives.

ATC code: N02AB03

Fentanyl is a potent µ-opioid analgesic with rapid onset of analgesia and short duration of action. Fentanyl is approximately 100-fold more potent than morphine as an analgesic. Secondary effects of fentanyl on central nervous system (CNS), respiratory and gastro-intestinal function are typical of opioid analgesics and are considered to be class effects. These can include respiratory depression, bradycardia, hypothermia, constipation, miosis, physical dependence and euphoria.

The analgesic effects of fentanyl are related to the blood level of the active substance; in opioid-naïve patients, minimum effective analgesic serum concentrations of fentanyl range from 0.3-1.2 ng/ml, while blood levels of 10-20 ng/ml produce surgical anaesthesia and profound respiratory depression.

In patients with chronic cancer pain on stable maintenance doses of opioids, statistically significant improvement in pain intensity difference was seen with Abstral Sublingual Tablet versus placebo from 10 minutes after administration onwards (see figure 1 below), with a significantly lower need for rescue analgesic therapy.

Figure 1 Mean Pain Intensity Difference from baseline (± SE) for Abstral Sublingual Tablet Compared with Placebo (measured by a 0-10 Likert scale)

The safety and efficacy of Abstral Sublingual Tablet have been evaluated in patients taking the drug at the onset of the breakthrough pain episode. Pre-emptive use of Abstral Sublingual Tablet for predictable pain episodes was not investigated in the clinical trials.

Fentanyl, in common with all µ-opioid receptor agonists, produces dose dependent respiratory depression. This risk is higher in opioid-naïve subjects than in patients experiencing severe pain or receiving chronic opioid therapy. Long-term treatment with opioids typically leads to development of tolerance to their secondary effects.

While opioids generally increase the tone of urinary tract smooth muscle, the net effect tends to be variable, in some cases producing urinary urgency, in others, difficulty in urination.

Opioids increase the tone and decrease the propulsive contractions of the smooth muscle of the gastrointestinal tract leading to a prolongation in gastrointestinal transit time, which may be responsible for the constipating effect of fentanyl.

Pharmacokinetic properties

The information provided in Pharmacokinetic properties of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Pharmacokinetic properties in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Fentanyl is a highly lipophilic drug absorbed very rapidly through the oral mucosa and more slowly through the gastrointestinal tract. Orally administered fentanyl undergoes pronounced hepatic and intestinal first pass effects.

Abstral Sublingual Tablet is a quick dissolving sublingual tablet formulation. Rapid absorption of fentanyl occurs over about 30 minutes following administration of Abstral Sublingual Tablet. The absolute bioavailability of Abstral Sublingual Tablet has been calculated to be 54 %. Mean maximal plasma concentrations of fentanyl range from 0.2 to 1.3 ng/ml (after administration of 100 to 800 µg Abstral Sublingual Tablet) and are reached within 22.5 to 240 minutes.

About 80-85% of fentanyl is bound by plasma proteins, mainly α1-glycoprotein and to a lesser extent albumin and lipoprotein. The volume of distribution of fentanyl at steady state is about 3-6 l/kg.

Fentanyl is metabolised primarily via CYP3A4 to a number of pharmacologically inactive metabolites, including norfentanyl. Within 72 hours of intravenous fentanyl administration around 75% of the dose is excreted into the urine, mostly as metabolites, with less than 10% as unchanged drug. About 9% of the dose is recovered in the faeces, primarily as metabolites. Total plasma clearance of fentanyl is about 0.5 l/h/kg.

After Abstral Sublingual Tablet administration, the main elimination half-life of fentanyl is about 7 hours (range 3-12.5 hours) and the terminal half-life is about 20 hours (range 11.5-25 hours).

The pharmacokinetics of Abstral Sublingual Tablet have been shown to be dose proportional over the dose range of 100 to 800 µg. Pharmacokinetic studies have shown that multiple tablets are bioequivalent to single tablets of the equivalent dose.

Renal/hepatic impairment

Impaired hepatic or renal function could cause increased serum concentrations. Older, cachectic or generally impaired patients may have a lower fentanyl clearance, which could cause a longer terminal half-life for the compound .

Pharmacotherapeutic group

The information provided in Pharmacotherapeutic group of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Pharmacotherapeutic group in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Analgesics; Opioids; Phenylpiperidine derivatives.

Preclinical safety data

The information provided in Preclinical safety data of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Preclinical safety data in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Safety pharmacology and repeated dose toxicity data reveal no special hazard for humans that is not already covered by other sections of this SPC. Animal studies have shown reduced fertility and increased mortality in rat foetuses. Teratogenic effects have, however, not been demonstrated.

Mutagenicity testing in bacteria and in rodents yielded negative results. Like other opioids fentanyl showed mutagenic effects in vitro in mammalian cells. A mutagenic risk with therapeutic use seems unlikely since effects were induced only at very high concentrations.

Carcinogenicity studies (26-week dermal alternative bioassay in Tg.AC transgenic mice; two-year subcutaneous carcinogenicity study in rats) with fentanyl did not reveal any findings indicative of oncogenic potential. Evaluation of brain slides from the carcinogenicity study in rats revealed brain lesions in animals administered high doses of fentanyl citrate. The relevance of these findings to humans is unknown.

Incompatibilities

The information provided in Incompatibilities of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Incompatibilities in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Not applicable.

Special precautions for disposal and other handling

The information provided in Special precautions for disposal and other handling of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Special precautions for disposal and other handling in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Waste material should be disposed of safely. Patients/carers should be encouraged to return any unused product to the Pharmacy, where it should be disposed of in accordance with national and local requirements.

Name of the medicinal product
Abstral Sublingual Tablet
Qualitative and quantitative composition
Fentanyl
Pharmaceutical form
Sublingual tablet
Therapeutic indications
The information provided in Therapeutic indications of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Therapeutic indications in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Management of breakthrough pain in adult patients using opioid therapy for chronic cancer pain. Breakthrough pain is a transient exacerbation of otherwise controlled chronic background pain.

Dosage (Posology) and method of administration
The information provided in Dosage (Posology) and method of administration of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Dosage (Posology) and method of administration in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Abstral Sublingual Tablet should only be administered to patients who are considered tolerant to their opioid therapy for persistent cancer pain. Patients can be considered opioid tolerant if they take at least 60 mg of oral morphine daily, at least 25 micrograms of transdermal fentanyl per hour, at least 30 mg of oxycodone daily, at least 8 mg of oral hydromorphone daily or an equianalgesic dose of another opioid for a week or longer.

Method of administration:

Abstral Sublingual Tablet sublingual tablets should be administered directly under the tongue at the deepest part. Abstral Sublingual Tablet sublingual tablets should not be swallowed, but allowed to completely dissolve in the sublingual cavity without chewing or sucking. Patients should be advised not to eat or drink anything until the sublingual tablet is completely dissolved.

In patients who have a dry mouth water may be used to moisten the buccal mucosa before taking Abstral Sublingual Tablet.

Dose titration:

The object of dose titration is to identify an optimal maintenance dose for ongoing treatment of breakthrough pain episodes. This optimal dose should provide adequate analgesia with an acceptable level of adverse reactions.

The optimal dose of Abstral Sublingual Tablet will be determined by upward titration, on an individual patient basis. Several doses are available for use during the dose titration phase. The initial dose of Abstral Sublingual Tablet used should be 100 micrograms, titrating upwards as necessary through the range of available dosage strengths.

Patients should be carefully monitored until an optimal dose is reached.

Switching from other fentanyl containing products to Abstral Sublingual Tablet must not occur at a 1:1 ratio because of different absorption profiles. If patients are switched from another fentanyl containing product, a new dose titration with Abstral Sublingual Tablet is required.

The following dose regimen is recommended for titration, although in all cases the physician should take into account the clinical need of the patient, age and concomitant illness.

All patients must start therapy with a single 100 microgram sublingual tablet. If adequate analgesia is not obtained within 15-30 minutes of administration of a single sublingual tablet, a supplemental (second) 100 microgram sublingual tablet may be administered. If adequate analgesia is not obtained within 15-30 minutes of the first dose an increase in dose to the next highest tablet strength should be considered for the next episode of breakthrough pain (Refer to figure below).

Dose escalation should continue in a stepwise manner until adequate analgesia with tolerable adverse reactions is achieved. The dose strength for the supplemental (second) sublingual tablet should be increased from 100 to 200 micrograms at doses of 400 micrograms and higher. This is illustrated in the schedule below. No more than two (2) doses should be administered for a single episode of breakthrough pain during this titration phase.

Strength (micrograms) of first sublingual tablet per episode of breakthrough pain

Strength (micrograms) of supplemental (second) sublingual tablet to be taken 15-30 minutes after first tablet, if required

100

100

200

100

300

100

400

200

600

200

800

-

If adequate analgesia is achieved at the higher dose, but undesirable effects are considered unacceptable, an intermediate dose (using the 100 microgram sublingual tablet where appropriate) may be administered.

During titration, patients can be instructed to use multiples of 100 microgram tablets and/or 200 microgram tablets for any single dose. No more than four (4) tablets should be used at any one time.

The efficacy and safety of doses higher than 800 micrograms have not been evaluated in clinical studies in patients.

In order to minimise the risk of opioid–related adverse reactions and to identify the appropriate dose, it is imperative that patients be monitored closely by health professionals during the titration process.

During titration patients should wait at least 2 hours before treating another episode of breakthrough pain with Abstral Sublingual Tablet.

Maintenance therapy:

Once an appropriate dose has been established, which may be more than one tablet, patients should be maintained on this dose and should limit consumption to a maximum of four Abstral Sublingual Tablet doses per day.

During the maintenance period patients should wait at least 2 hours before treating another episode of breakthrough pain with Abstral Sublingual Tablet.

Dose re-adjustment:

If the response (analgesia or adverse reactions) to the titrated Abstral Sublingual Tablet dose markedly changes, an adjustment of dose may be necessary to ensure that an optimal dose is maintained.

If more than four episodes of breakthrough pain are experienced per day over a period of more than four consecutive days, then the dose of the long acting opioid used for persistent pain should be re-evaluated. If the long acting opioid or dose of long acting opioid is changed the Abstral Sublingual Tablet dose should be re-evaluated and re-titrated as necessary to ensure the patient is on an optimal dose.

It is imperative that any dose re-titration of any analgesic is monitored by a health professional.

Discontinuation of therapy:

Abstral Sublingual Tablet should be discontinued immediately if the patient no longer experiences breakthrough pain episodes. The treatment for the persistent background pain should be kept as prescribed.

If discontinuation of all opioid therapy is required, the patient must be closely followed by the doctor in order to avoid the possibility of abrupt withdrawal effects.

Use in children and adolescents:

Abstral Sublingual Tablet must not be used in patients less than 18 years of age due to a lack of data on safety and efficacy.

Use in older people:

Dose titration needs to be approached with particular care and patients observed carefully for signs of fentanyl toxicity .

Use in patients with renal and hepatic impairment

Patients with kidney or liver dysfunction should be carefully observed for signs of fentanyl toxicity during the Abstral Sublingual Tablet titration phase .

Contraindications
The information provided in Contraindications of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Contraindications in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Patients without maintenance opioid therapy as there is an increased risk of respiratory depression.

Severe respiratory depression or severe obstructive lung conditions.

Treatment of acute pain other than breakthrough pain.

Special warnings and precautions for use
The information provided in Special warnings and precautions for use of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Special warnings and precautions for use in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Patients and their carers must be instructed that Abstral Sublingual Tablet contains an active substance in an amount that can be fatal to a child, and therefore to keep all tablets out of the reach and sight of children.

Due to the potentially serious undesirable effects that can occur when taking an opioid therapy such as Abstral Sublingual Tablet, patients and their carers should be made fully aware of the importance of taking Abstral Sublingual Tablet correctly and what action to take should symptoms of overdose occur.

Before Abstral Sublingual Tablet therapy is initiated, it is important that the patient's long-acting opioid treatment used to control their persistent pain has been stabilised.

Upon repeated administration of opioids such as fentanyl, tolerance and physical and/or psychological dependence may develop. Iatrogenic addiction following therapeutic use of opioids is rare.

In common with all opioids, there is a risk of clinically significant respiratory depression associated with the use of Abstral Sublingual Tablet. Particular caution should be exercised during dose titration with Abstral Sublingual Tablet in patients with chronic obstructive pulmonary disease or other medical conditions predisposing them to respiratory depression (e.g. myasthenia gravis) because of the risk of further respiratory depression, which could lead to respiratory failure.

Abstral Sublingual Tablet should only be administered with extreme caution in patients who may be particularly susceptible to the intracranial effects of hyperkapnia, such as those showing evidence of raised intracranial pressure, reduced consciousness, coma or brain tumours. In patients with head injuries, the clinical course may be masked by the use of opioids. In such a case, opioids should be used only if absolutely necessary.

Cardiac disease

Fentanyl may produce bradycardia. Fentanyl should be used with caution in patients with previous or pre-existing bradyarrythmias.

Data from intravenous studies with fentanyl suggest that older patients may have reduced clearance, a prolonged half-life and they may be more sensitive to the active substance than younger patients. Older, cachectic, or debilitated patients should be observed carefully for signs of fentanyl toxicity and the dose reduced if necessary.

Abstral Sublingual Tablet should be administered with caution to patients with liver or kidney dysfunction, especially during the titration phase. The use of Abstral Sublingual Tablet in patients with hepatic or renal impairment may increase the bioavailability of fentanyl and decrease its systemic clearance, which could lead to accumulation and increased and prolonged opioid effects.

Care should be taken in treating patients with hypovolaemia and hypotension.

Abstral Sublingual Tablet has not been studied in patients with mouth wounds or mucositis. There may be a risk of increased systemic drug exposure in such patients and therefore extra caution is recommended during dose titration.

There should be no noticeable effects on cessation of treatment with Abstral Sublingual Tablet, but possible symptoms of withdrawal are anxiety, tremor, sweating, paleness, nausea and vomiting.

Serotonin Syndrome

• Caution is advised when Abstral Sublingual Tablet is coadministered with drugs that affect the serotoninergic neurotransmitter systems.

The development of a potentially life-threatening serotonin syndrome may occur with the concomitant use of serotonergic drugs such as Selective Serotonin Re-uptake Inhibitors (SSRIs) and Serotonin Norepinephrine Re-uptake Inhibitors (SNRIs), and with drugs which impair metabolism of serotonin (including Monoamine Oxidase Inhibitors [MAOIs]). This may occur within the recommended dose.

Serotonin syndrome may include mental-status changes (e.g., agitation, hallucinations, coma), autonomic instability (e.g., tachycardia, labile blood pressure, hyperthermia), neuromuscular abnormalities (e.g., hyperreflexia, incoordination, rigidity), and/or gastrointestinal symptoms (e.g., nausea, vomiting, diarrhoea).

If serotonin syndrome is suspected, treatment with Abstral Sublingual Tablet should be discontinued.

Effects on ability to drive and use machines
The information provided in Effects on ability to drive and use machines of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Effects on ability to drive and use machines in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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No studies on the effects on the ability to drive and use machines have been performed with Abstral Sublingual Tablet.

However, opioid analgesics are known to impair the mental or physical ability to perform potentially hazardous tasks such as driving or operating machinery. Patients should be advised not to drive or operate machinery if they become dizzy or drowsy or experience blurred or double vision while taking Abstral Sublingual Tablet.

This medicine can impair cognitive function and can affect a patient's ability to drive safely. This class of medicine is in the list of drugs included in regulations under 5a of the Road Traffic Act 1988. When prescribing this medicine, patients should be told:

• The medicine is likely to affect your ability to drive

• Do not drive until you know how the medicine affects you

• It is an offence to drive while under the influence of this medicine

• However, you would not be committing an offence (called 'statutory defence') if:

o The medicine has been prescribed to treat a medical or dental problem and

o You have taken it according to the instructions given by the prescriber and in the information provided with the medicine and

o It was not affecting your ability to drive safely

Undesirable effects
The information provided in Undesirable effects of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Undesirable effects in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Undesirable effects typical of opioids are to be expected with Abstral Sublingual Tablet; they tend to decrease in intensity with continued use. The most serious potential adverse reactions associated with opioid use are respiratory depression (which could lead to respiratory arrest), hypotension and shock.

The clinical trials of Abstral Sublingual Tablet were designed to evaluate safety and efficacy in treating patients with breakthrough cancer pain; all patients were taking concomitant opioids, such as sustained-release morphine, sustained-release oxycodone or transdermal fentanyl, for their persistent pain. Therefore it is not possible to definitively separate the effects of Abstral Sublingual Tablet alone.

The most frequently observed adverse reactions with Abstral Sublingual Tablet include typical opioid adverse reactions, such as nausea, constipation, somnolence and headache.

Tabulated Summary of Adverse Reactions with Abstral Sublingual Tablet and/or other fentanyl-containing compounds:

The following adverse reactions have been reported with Abstral Sublingual Tablet and/or other fentanyl-containing compounds during clinical studies and from post-marketing experience. They are listed below by system organ class and frequency (very common ≥ 1/10; common ≥ 1/100 to < 1/10; uncommon ≥1/1,000 to <1/100; not known (cannot be estimated from available data)). Within each frequency grouping, undesirable effects are presented in order of decreasing seriousness.

System Organ Class

Adverse Reaction by Frequency

Very common

≥ 1/10

Common

≥ 1/100 to < 1/10

Uncommon

≥1/1,000 to <1/100

Not known (cannot be estimated from available data)

Immune system disorders

Hypersensitivity

Metabolism and nutrition disorders

Anorexia

Decreased appetite

Psychiatric disorders

Depression

Paranoia

Confusional state

Disorientation

Mental status changes

Anxiety

Euphoric mood

Dysphoria

Emotional lability

Disturbance in attention

Insomnia

Hallucination

Nervous system disorders

Dizziness

Headache

Somnolence

Amnesia

Parosmia

Dysgeusia

Tremor

Lethargy

Hypoaesthesia

Sleep disorder

Convulsion

Eye disorders

Vision blurred

Cardiac disorders

Tachycardia

Bradycardia

Vascular disorders

Hypotension

Respiratory, thoracic and mediastinal disorders

Dyspnoea

Oropharyngeal pain

Throat tightness

Respiratory depression

Gastrointestinal disorders

Nausea

Stomatitis

Vomiting

Constipation

Dry mouth

Mouth ulceration

Gingival ulceration

Lip ulceration

Impaired gastric emptying

Abdominal pain

Dyspepsia

Stomach discomfort

Tongue disorder

Aphthous stomatitis

Swollen Tongue

Diarrhoea

Skin and subcutaneous tissue disorders

Hyperhidrosis

Skin lesion

Rash

Pruritus allergic

Pruritus

Night sweats

Increased tendency to bruise

Musculoskeletal and connective tissue disorders

Arthralgia

Musculoskeletal stiffness

Joint stiffness

Reproductive system and breast disorders

Erectile dysfunction

General disorders and administration site conditions

Fatigue

*Drug withdrawal syndrome

Asthenia

Malaise

Flushing and hot flush

Peripheral oedema

Pyrexia

Injury, poisoning and procedural complications

Accidental overdose

Fall

* opioid withdrawal symptoms such as nausea, vomiting, diarrhoea, anxiety, chills, tremor, and sweating have been observed with transmucosal fentanyl

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via Yellow Card Scheme: www.mhra.gov.uk/yellowcard

Overdose
The information provided in Overdose of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Overdose in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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The symptoms of fentanyl overdose are an extension of its pharmacological actions, the most serious effect being respiratory depression, which may lead to respiratory arrest.

Management of opioid overdose in the immediate term includes removal of any remaining Abstral Sublingual Tablet sublingual tablets from the mouth, physical and verbal stimulation of the patient and an assessment of the level of consciousness. A patent airway should be established and maintained. If necessary an oropharyngeal airway or endotracheal tube should be inserted, oxygen administered and mechanical ventilation initiated, as appropriate. Adequate body temperature and parenteral fluid intake should be maintained.

For the treatment of accidental overdose in opioid-naïve individuals, naloxone or other opioid antagonists should be used as clinically indicated and in accordance with their Summary of Product Characteristics. Repeated administration of the opioid antagonist may be necessary if the duration of respiratory depression is prolonged.

Care should be taken when using naloxone or other opioid antagonists to treat overdose in opioid-maintained patients, due to the risk of precipitating an acute withdrawal syndrome.

If severe or persistent hypotension occurs, hypovolaemia should be considered, and the condition should be managed with appropriate parenteral fluid therapy.

Muscle rigidity interfering with respiration has been reported with fentanyl and other opioids. In this situation, endotracheal intubation, assisted ventilation and administration of opioid antagonists as well as muscle relaxants may be requested.

Pharmacodynamic properties
The information provided in Pharmacodynamic properties of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Pharmacodynamic properties in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Pharmacotherapeutic group: Analgesics; Opioids; Phenylpiperidine derivatives.

ATC code: N02AB03

Fentanyl is a potent µ-opioid analgesic with rapid onset of analgesia and short duration of action. Fentanyl is approximately 100-fold more potent than morphine as an analgesic. Secondary effects of fentanyl on central nervous system (CNS), respiratory and gastro-intestinal function are typical of opioid analgesics and are considered to be class effects. These can include respiratory depression, bradycardia, hypothermia, constipation, miosis, physical dependence and euphoria.

The analgesic effects of fentanyl are related to the blood level of the active substance; in opioid-naïve patients, minimum effective analgesic serum concentrations of fentanyl range from 0.3-1.2 ng/ml, while blood levels of 10-20 ng/ml produce surgical anaesthesia and profound respiratory depression.

In patients with chronic cancer pain on stable maintenance doses of opioids, statistically significant improvement in pain intensity difference was seen with Abstral Sublingual Tablet versus placebo from 10 minutes after administration onwards (see figure 1 below), with a significantly lower need for rescue analgesic therapy.

Figure 1 Mean Pain Intensity Difference from baseline (± SE) for Abstral Sublingual Tablet Compared with Placebo (measured by a 0-10 Likert scale)

The safety and efficacy of Abstral Sublingual Tablet have been evaluated in patients taking the drug at the onset of the breakthrough pain episode. Pre-emptive use of Abstral Sublingual Tablet for predictable pain episodes was not investigated in the clinical trials.

Fentanyl, in common with all µ-opioid receptor agonists, produces dose dependent respiratory depression. This risk is higher in opioid-naïve subjects than in patients experiencing severe pain or receiving chronic opioid therapy. Long-term treatment with opioids typically leads to development of tolerance to their secondary effects.

While opioids generally increase the tone of urinary tract smooth muscle, the net effect tends to be variable, in some cases producing urinary urgency, in others, difficulty in urination.

Opioids increase the tone and decrease the propulsive contractions of the smooth muscle of the gastrointestinal tract leading to a prolongation in gastrointestinal transit time, which may be responsible for the constipating effect of fentanyl.

Pharmacokinetic properties
The information provided in Pharmacokinetic properties of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Pharmacokinetic properties in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Fentanyl is a highly lipophilic drug absorbed very rapidly through the oral mucosa and more slowly through the gastrointestinal tract. Orally administered fentanyl undergoes pronounced hepatic and intestinal first pass effects.

Abstral Sublingual Tablet is a quick dissolving sublingual tablet formulation. Rapid absorption of fentanyl occurs over about 30 minutes following administration of Abstral Sublingual Tablet. The absolute bioavailability of Abstral Sublingual Tablet has been calculated to be 54 %. Mean maximal plasma concentrations of fentanyl range from 0.2 to 1.3 ng/ml (after administration of 100 to 800 µg Abstral Sublingual Tablet) and are reached within 22.5 to 240 minutes.

About 80-85% of fentanyl is bound by plasma proteins, mainly α1-glycoprotein and to a lesser extent albumin and lipoprotein. The volume of distribution of fentanyl at steady state is about 3-6 l/kg.

Fentanyl is metabolised primarily via CYP3A4 to a number of pharmacologically inactive metabolites, including norfentanyl. Within 72 hours of intravenous fentanyl administration around 75% of the dose is excreted into the urine, mostly as metabolites, with less than 10% as unchanged drug. About 9% of the dose is recovered in the faeces, primarily as metabolites. Total plasma clearance of fentanyl is about 0.5 l/h/kg.

After Abstral Sublingual Tablet administration, the main elimination half-life of fentanyl is about 7 hours (range 3-12.5 hours) and the terminal half-life is about 20 hours (range 11.5-25 hours).

The pharmacokinetics of Abstral Sublingual Tablet have been shown to be dose proportional over the dose range of 100 to 800 µg. Pharmacokinetic studies have shown that multiple tablets are bioequivalent to single tablets of the equivalent dose.

Renal/hepatic impairment

Impaired hepatic or renal function could cause increased serum concentrations. Older, cachectic or generally impaired patients may have a lower fentanyl clearance, which could cause a longer terminal half-life for the compound .

Pharmacotherapeutic group
The information provided in Pharmacotherapeutic group of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Pharmacotherapeutic group in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Analgesics; Opioids; Phenylpiperidine derivatives.
Preclinical safety data
The information provided in Preclinical safety data of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Preclinical safety data in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Safety pharmacology and repeated dose toxicity data reveal no special hazard for humans that is not already covered by other sections of this SPC. Animal studies have shown reduced fertility and increased mortality in rat foetuses. Teratogenic effects have, however, not been demonstrated.

Mutagenicity testing in bacteria and in rodents yielded negative results. Like other opioids fentanyl showed mutagenic effects in vitro in mammalian cells. A mutagenic risk with therapeutic use seems unlikely since effects were induced only at very high concentrations.

Carcinogenicity studies (26-week dermal alternative bioassay in Tg.AC transgenic mice; two-year subcutaneous carcinogenicity study in rats) with fentanyl did not reveal any findings indicative of oncogenic potential. Evaluation of brain slides from the carcinogenicity study in rats revealed brain lesions in animals administered high doses of fentanyl citrate. The relevance of these findings to humans is unknown.

Incompatibilities
The information provided in Incompatibilities of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Incompatibilities in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Not applicable.

Special precautions for disposal and other handling
The information provided in Special precautions for disposal and other handling of Abstral Sublingual Tablet is based on data of another medicine with exactly the same composition as the Abstral Sublingual Tablet of the medicine (Fentanyl). Be careful and be sure to specify the information on the section Special precautions for disposal and other handling in the instructions to the drug Abstral Sublingual Tablet directly from the package or from the pharmacist at the pharmacy.
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Waste material should be disposed of safely. Patients/carers should be encouraged to return any unused product to the Pharmacy, where it should be disposed of in accordance with national and local requirements.

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