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Boots Paracetamol

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Boots Paracetamol

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Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

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Overview of Boots Paracetamol

Property Description
Active Ingredient Acetaminophen (Paracetamol)
Form Tablet, capsule, liquid suspension, suppository
Pharmacological Class Non-opioid analgesic, Antipyretic
Common Use Pain relief, fever reduction
Origin Synthetic organic compound

What Type of Medicine is Boots Paracetamol? (Identity and Classification)

Boots Paracetamol is an over-the-counter (OTC) systemic analgesic and antipyretic preparation widely recognized across the UK and distributed by the Boots brand. The active substance is chemically known as Acetaminophen, or Paracetamol, and is classified as a para-aminophenol derivative. Paracetamol is a foundational choice for managing mild to moderate pain and fever. This preparation is designated as a non-opioid analgesic, distinguishing it from centrally acting narcotics while ensuring accessibility for common self-care needs.

Understanding Paracetamol's General Purpose and Benefit (Purpose and Mechanism)

The medication's fundamental purpose is defined by its core therapeutic actions: providing general pain relief and facilitating fever reduction. Its physiological action is primarily exerted within the central nervous system, where the compound works to modulate the transmission of pain signals and acts upon the brain’s heat-regulating center. It is used for its effectiveness against aches and discomfort. Unlike non-steroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen, Paracetamol exhibits minimal clinical anti-inflammatory action in peripheral tissues, a factor which contributes to its distinct safety profile.

Available Forms of Paracetamol (Forms and Preparation)

The active substance is manufactured in a variety of dosage forms under the Boots brand to accommodate specific patient groups, commonly including standard adult tablets and specialized liquid suspensions for pediatric patients. These preparations accommodate different administration methods, which are typically oral but may be rectal via suppositories when swallowing is not possible. The availability of multiple formats ensures that the active ingredient can reliably enter the systemic circulation regardless of the patient's age or ability to ingest solid medication.

Regulatory References

  1. Acetaminophen - StatPearls - NCBI Bookshelf
  2. Acetaminophen - MedlinePlus Drug Information
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What side effects are possible with Boots Paracetamol?

Possible Side Effects and Safety Information

The majority of individuals using this medicine do not experience side effects. However, all factual statements concerning adverse effects are based on post-marketing experience and regulatory documentation (MHRA).


Adverse Reactions and Frequencies

Classification System-Organ Class Involved Key Reactions
Rare Immune System, Skin, Hepatobiliary, Blood Allergic reactions (e.g., skin rash, difficulty breathing, mouth sores, fever); blood changes (leading to bruising, fever, or infections); liver effects (nausea, jaundice)
Very Rare Skin and Subcutaneous Tissue Serious skin reactions
Frequency Not Known Metabolism and Nutrition Metabolic acidosis (a serious blood and fluid abnormality)

Clinically Significant Safety Considerations

Overdose Risk: Taking more than the recommended dose can cause delayed, serious liver damage, which may lead to liver failure and require urgent medical treatment, even if the patient initially feels well.

Specific Safety Restrictions:

  • Contraindication: Do not use if there is a known allergy to paracetamol.
  • Concomitant Use: It is critical not to take any other product containing paracetamol to avoid overdose.
  • Dose-Related Risk: The risk of Metabolic acidosis has been reported in patients with underlying severe conditions (e.g., severe renal impairment, sepsis, malnutrition, chronic alcoholism) when paracetamol is used at therapeutic doses for a prolonged period, or when taken with the antibiotic flucloxacillin.

Population-Specific Caution:

  • Pre-existing Conditions: Caution is advised for individuals with liver or kidney problems, including alcoholic liver disease, or those who are alcohol dependent.
  • Pregnancy: Use the lowest effective dose for the shortest duration necessary; professional guidance should be sought if pain or fever is not reduced, or if more frequent dosing is required.
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Overdose and Emergency Response

Overdose and When to Seek Help

Immediate medical management is required in the event of Paracetamol overdose, even if initial symptoms are not present. Severe overdose can lead to acute hepatic failure and is documented as potentially fatal. Always seek medical help or contact a Poison Control Center right away if an overdose is suspected.

Documented Manifestations and Systems

Initial overdose presentations may include nausea, vomiting, abdominal pain, and loss of appetite. The primary severe outcome involves the Hepatic system, with documented risks of liver necrosis. In severe cases, effects may extend to the Renal system (tubular necrosis) and the Central Nervous System (coma).

Intervention and Monitoring Requirements

The antidote, N-acetylcysteine (NAC), is documented for overdose treatment; its efficacy diminishes progressively after eight hours post-ingestion. Hospital procedures mandate measuring the plasma Paracetamol concentration and monitoring liver function tests (transaminases) and Prothrombin Time (PT/INR). Risk is associated with acute ingestion of supratherapeutic doses, chronic alcohol consumption, or pre-existing liver disease.

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Therapeutic Uses of Boots Paracetamol

What Boots Paracetamol Treats: Main Uses and Benefits

Paracetamol is commonly used for the management of certain symptoms, specifically pain and fever. The medication is considered relevant for easing symptoms across various clinical contexts and is used to provide symptomatic relief in several scenarios.

It is generally used to help with symptoms related to physical discomfort, including acute pain such as headache, dental pain, sore throat, muscular aches, and minor rheumatic pain. Furthermore, it is commonly used to help with symptoms related to systemic imbalance, notably fever, particularly when associated with colds and flu or post-immunisation discomfort.

The medicine is applied across domains where additional symptomatic support is needed, and may assist with maintaining functional stability when symptoms become more noticeable.

“This medication plays a role in managing distressing symptoms, supporting the patient during difficult episodes.”

Quick Fact: Focus on Episodic Symptom Patterns Paracetamol is commonly used for managing recurrent, episodic manifestations such as menstrual cramps (period pain) and other transient acute aches.

Regulatory References

  1. National Institutes of Health (NIH) overview
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Eligibility and Restrictions for Use

The eligibility for using Paracetamol (Acetaminophen) is defined by regulatory documents based on patient population, age, and pre-existing medical status. Use is restricted by specific contraindications and conditional limitations.

Eligibility Scope

Category Official Regulatory Status
Populations for whom use is allowed Adults and adolescents (ge 16 years for standard tablets). Children are eligible only above a minimum age threshold, typically 2 to 3 months, in specific formulations.
Populations for whom use is contraindicated Patients with known hypersensitivity to Paracetamol or its excipients. Patients with severe active liver disease or acute liver failure [2.1, 1.3].

Condition-Specific Eligibility Rules

  • Hepatic Status: Severe hepatic failure is an absolute contraindication [2.1]. Use is conditional and requires caution in patients with less severe hepatic impairment, chronic alcoholism, or glutathione-depleted states [1.1, 1.3].
  • Renal Status: Use requires caution in patients with severe renal impairment (CrCl < 30 mL/min) [1.1].
  • Co-administration: Use is strictly prohibited with any other product containing Paracetamol to prevent the risk of overdose [1.3].

Pregnancy and Lactation Eligibility

  • Pregnancy: Paracetamol can be used when clinically necessary, but official guidance mandates using the lowest effective dose for the shortest duration [4.2].
  • Breastfeeding: Use is generally permitted, as the amount transferred into breast milk is not considered clinically significant [4.1].

Connection to the Overall Eligibility Profile

Regulatory agencies formally structure eligibility by classifying populations as Contraindicated, Permitted, or Conditional. This defines who is excluded (e.g., severe liver disease), who requires special consideration (e.g., severe renal impairment), and who is eligible under standard labeled conditions (e.g., adults and older children) [2.1, 1.1].

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What should I know about interactions with other medicines?

This section summarizes the official, label-based interaction profile of Paracetamol (Acetaminophen) as documented by government regulatory authorities.

Interaction Scope

Medicinal products and substance categories with documented interactions include anticoagulants (Coumarin derivatives), hepatic enzyme inducers, absorption modifiers (bile acid sequestrants and prokinetics), and other acetaminophen-containing products. Specific interacting agents explicitly listed in regulatory documents include Warfarin, Cholestyramine, Metoclopramide, Busulfan, and various enzyme inducers like Carbamazepine and the herbal product St. John's Wort.

The mechanistic basis for these interactions involves the inhibition of clearance by agents like Probenecid, the modification of absorption rate by Metoclopramide, and the pharmacodynamic enhancement of Warfarin's anticoagulant effect with prolonged regular use. Co-administration is explicitly restricted with any other product containing acetaminophen due to the risk of severe hepatic injury.

Timing and Population Notes

Regulatory labels detail specific timing requirements for certain interactions. For instance, co-administration with Cholestyramine requires a minimum time separation of at least one hour to prevent reduced absorption. Furthermore, use is officially recommended to be avoided within the 72 hours before and during treatment with Busulfan. A specific population note highlights that the hepatotoxicity risk is heightened in patients with chronic alcoholism or who consume three or more alcoholic drinks daily.

Resulting Interaction Structure

The official interaction statements establish two primary concerns: modifications to drug exposure and enhancement of toxicity or clinical effect. The profile outlines mandatory restrictions against co-use with other acetaminophen products and provides conditions for safe co-administration, such as the timing separation rules and the caution regarding chronic alcohol use.

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Mechanism of Action

The action of Paracetamol is primarily centralized within the nervous system, modulating key pathways involved in nociception and thermoregulation. Its mechanism is defined by a multi-pronged approach involving direct enzyme inhibition and the modulation of endogenous nociceptive signaling systems.

Central Enzyme Inhibition and Thermoregulation

The drug acts by selectively inhibiting Cyclooxygenase (COX) enzymes within the brain and spinal cord, thereby reducing the synthesis of Prostaglandin E2 (PGE2) . This reduced PGE2 concentration directly modulates the hypothalamic temperature regulation center by inhibiting the elevation of the body's thermal set-point. The resulting physiological effect is the initiation of heat dissipation processes, leading to the modulation of the elevated thermal set-point.

Multi-Pathway Analgesia via Endogenous Systems

A significant part of the mechanism involves the drug's active metabolite, AM404, which indirectly influences nociceptive pathways by inhibiting the reuptake of the endocannabinoid anandamide. This increases functional anandamide levels and leads to the modulation of endocannabinoid (CB1) receptors and descending serotonergic pathways in the CNS. The combination of these actions results in the suppression and attenuation of nociceptive signal transmission within the CNS.

Mechanistic Limitations: Constrained Peripheral Response

Paracetamol's mechanism is structurally constrained in peripheral tissues. Its ability to inhibit COX is significantly weakened by the high concentration of hydroperoxides typically present at sites of inflammation. Consequently, the drug promotes minimal physiological inhibition of local prostaglandin generation in peripheral tissues, resulting in a constrained anti-inflammatory response.

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Dosage and Administration Information

How to Use Boots Paracetamol

Administration of Paracetamol (Acetaminophen) is governed by specific guidelines regarding route, dose limits, and frequency. Use is intended to be for the shortest duration necessary, and administration must cease when symptoms resolve.


Official Administration Guidelines

Guideline Domain Instruction
Approved Routes Primarily Oral (tablets, solutions); Rectal via suppository is applied when the oral route is not feasible.
Adult Dosing Standard single dose ranges from 500 mg up to 1,000 mg (1 g). The maximum total daily dose for most adults is 4,000 mg (4 g) in a 24-hour period.
Dosing Frequency A minimum interval of 4 hours must be strictly observed between doses of immediate-release formulations. No more than 4 doses of 1,000 mg should be taken in 24 hours.
With/Without Food Administration can occur with or without food. Taking the medication without food may lead to a faster onset of action.

Procedural and Population Constraints

The usage protocol emphasizes adherence to strict numerical and contextual limitations. For children, dosing is determined by weight and age using appropriate strengths, such as oral solutions. For adults weighing less than 50 kg, or those with severe renal or hepatic impairment, the daily maximum dose is reduced and/or the minimum dosing interval is prolonged to 6 or 8 hours. A crucial instruction is the absolute restriction against co-administering this medicine with any other product that contains Paracetamol.

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Recent Clinical Evidence

Research Evidence / Overview of Studies for Boots Paracetamol

Evidence for Use in Fever Reduction (Antipyresis)

Research exploring how symptoms change over time when managing fever has primarily utilized Randomized Controlled Trials (RCTs) and Systematic Reviews. These studies examined specific outcomes related to systemic or functional imbalance, such as the rate of temperature fall and the time until the fever cleared. The populations studied included febrile children and adults who presented with fever.

Findings describe measurements of temperature in trials that included a placebo comparison. Evidence contributes to understanding symptom patterns but research does not determine whether an individual will respond similarly.

Evidence for Use in Mild to Moderate Acute Pain Relief

Systematic Reviews and Meta-analyses of RCTs were used to examine outcomes in conditions involving periods of heightened symptoms in various acute pain models. Studies monitored patient-reported outcomes describing episodic or acute changes in pain intensity using standardized scales, as well as the need for rescue medication.

Research describes that the substance has been evaluated in trials focusing on several dozen acute pain conditions. Conversely, some data show patterns where measurements were insufficient to meet specified endpoints in trials focusing on conditions such as acute low back pain. Long-term outcomes and the duration of observed symptom change beyond the initial 4-6 hour period are not well characterized in most trial models.

Evidence in Special Populations and Research Gaps

Research has specifically examined the use of the substance in groups such as febrile children and pregnant individuals. For pregnant individuals, large-scale observational settings have evaluated the substance's association with various developmental outcomes in offspring.

Regulatory bodies and high-quality systematic reviews have examined these patterns, with data suggesting that a causal relationship has not been established. Data for certain groups remain insufficient, particularly for older adults with complex health needs, and evidence quality varies across studies, leading to uncertainty about its use in many common scenarios.

Key Studies & References Acetaminophen - StatPearls (General Monograph, Indications, Mechanism)

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Frequently Asked Questions (FAQ)

Common questions about Boots Paracetamol (FAQ)


Q: Is Boots Paracetamol the same as what is sold under other paracetamol brand names?

Paracetamol is the official name for the active chemical substance, also known as acetaminophen. Official drug information indicates that this substance is sold under many different brand names globally. Regardless of the brand, the active ingredient is the same.


Q: Does Boots Paracetamol affect my ability to drive or use machinery?

According to the official product information and regulatory documents, there are no known effects on a patient's ability to drive or operate machinery. The drug is not typically associated with sedation or impaired performance.


Q: Can I take Boots Paracetamol if I have stomach pain?

Regulatory documents do not list simple stomach pain as a specific contraindication for using the product. While Paracetamol is generally well-tolerated in the stomach, severe abdominal pain is listed among the possible adverse effects reported in cases of high-dose or overdose situations.


Q: Is it normal to feel tired after taking Paracetamol?

Fatigue or tiredness is not typically listed as a common or frequent side effect in regulatory documents. However, severe fatigue or unusual weakness can be a symptom reported in relation to acetaminophen toxicity, especially in cases of overdose.


Q: Can Boots Paracetamol be used for dental pain?

Yes. The therapeutic uses listed in official product information include the symptomatic treatment of toothache (odontalgia).


Q: Are there any long-term effects of using Paracetamol regularly?

Official drug warnings advise that long-term regular use of Paracetamol requires caution. Even at recommended doses, prolonged use is associated with risks to kidney and liver function, which may require medical follow-up.


Q: If I miss a dose of Boots Paracetamol, what happens?

Official instructions focus entirely on safety constraints regarding frequency. Regulatory guidelines strictly require that a minimum time interval (usually 4 hours) must be observed between doses to prevent overdose risk.


Q: Is Boots Paracetamol safe to use during the last months of pregnancy?

Official advice indicates that use during pregnancy is allowed if a clinical need is established. When used, it should be taken at the lowest effective dose, for the shortest possible duration, and with the lowest frequency.


Q: What is the maximum number of days I can take Boots Paracetamol consecutively?

Official regulatory guidelines generally advise limiting use to a specific number of days (e.g., 3 days for fever or 5–10 days for pain) before seeking further consultation.


Q: Can taking Boots Paracetamol impact the results of blood tests?

Official product documents include a warning that the medication may interfere with the results of certain laboratory tests. For example, it may affect the benthyromide test used to evaluate pancreatic functionality.


Q: What ingredients are in Boots Paracetamol besides the active one?

All ingredients are listed in official product information. This includes the inactive ingredients, known as excipients, which are identified in regulatory documents to check for substances that may cause hypersensitivity.


Q: Is it safe to drink coffee or caffeine while using Paracetamol?

Specific regulatory interaction warnings for Paracetamol and general caffeine intake are not commonly listed in core documents. Consulting a healthcare provider regarding consumption is generally advised, especially when combining products that contain both caffeine and paracetamol.


Q: Can Boots Paracetamol be taken with multivitamins or supplements?

General drug safety advice suggests that Paracetamol is not typically affected by most standard vitamin supplements. However, general drug safety guidelines recommend consulting a healthcare provider regarding the concurrent use of any supplements.


Q: How quickly does the effect of Boots Paracetamol wear off?

Pharmacokinetic data, which describes how the medicine works in the body, indicates that the duration of the analgesic (pain-relieving) effect for an oral dose is typically between 4 to 6 hours. This duration guides the recommended minimum time interval between doses.


Q: Can elderly people use Boots Paracetamol safely?

Official dosing guidelines include the elderly in the standard adult posology (dosing), confirming its general suitability. However, precautions remain relevant for elderly individuals who have pre-existing conditions, particularly severe renal or hepatic impairment.


Q: Does Boots Paracetamol help with menstrual cramps?

Yes. The therapeutic uses listed in official documents include the symptomatic treatment of period pain (dysmenorrhoea).


Q: Is it safe to take Boots Paracetamol if I have asthma?

Regulatory warnings note that mild bronchospasm (a tightening of airways) has been rarely reported in patients who have a known cross-hypersensitivity to acetylsalicylic acid (aspirin). Paracetamol is generally considered appropriate for most people with asthma, but caution is advised in cases of aspirin sensitivity.


Q: Can Boots Paracetamol be used for arthritis pain?

Official therapeutic indications include the treatment of mild arthritis and osteomuscular pain.


Q: Can I take Boots Paracetamol if I am fasting?

Administration guidelines state the medication can be taken with or without food. Taking it without food may sometimes accelerate the onset of its pain-relieving effects.


Q: What evidence supports the use of Paracetamol for managing pain?

Official product documents indicate its use for a range of painful conditions. This is supported by evidence related to its mechanism of action, which involves modulating key pathways in the central nervous system involved in pain (nociception).


Q: Does Boots Paracetamol have a risk of addiction?

Paracetamol is not classified as a controlled substance in the same way as opioid medicines. While addiction in the traditional sense is less common, some official risk factor reports note that psychological dependence has been observed in individuals using it frequently to cope with chronic pain.


Q: Does the time of day matter when taking Boots Paracetamol?

Official instructions for use focus on a key safety factor: strictly observing the minimum interval (usually 4 hours) between doses. The specific time of day is less relevant than adhering to this minimum waiting period.


Q: What information is available about paracetamol use in breastfeeding mothers?

Regulatory documents and drug information databases confirm that the medication is excreted into breast milk. However, it is not present in a clinically significant amount, and available safety data generally do not contraindicate its use while breastfeeding.


Q: Does Paracetamol have a listed role in treating nerve pain?

Yes. The therapeutic uses listed in official product information include the symptomatic treatment of neuralgia, which refers to nerve pain.


Q: What does official data say about the incidence of common side effects?

Official documents categorize adverse effects based on frequency and list known effects, such as blood disorders and skin reactions. However, official data describes the adverse effects of Paracetamol as rare or very rare.


Q: Is it true that Paracetamol can harm the liver?

Yes, official warnings confirm that severe liver damage is a known risk associated with Paracetamol. This risk is primarily associated with exceeding the recommended daily dose or when specific risk factors, such as chronic alcohol use, are present.


Q: What are the signs of a possible allergic reaction to Paracetamol?

Official documents list signs of a possible allergic reaction, which may include sudden skin rashes, peeling, mouth ulcers, or swelling of the face, lips, or throat, sometimes causing breathing problems.


Q: What is the official definition of the therapeutic use of Paracetamol?

Regulatory documents define its therapeutic use as the symptomatic treatment of pain of mild to moderate intensity and the reduction of various febrile (feverish) conditions.


Q: Why is Paracetamol often recommended for headaches?

The drug is officially indicated for the symptomatic treatment of various painful conditions. The therapeutic uses listed in official documents include the treatment of headache, including migraine headache.


Q: How long does it usually take for Boots Paracetamol to start working?

Pharmacokinetic data found in official information reports that the onset of action for oral administration (when the medicine begins to take effect) is approximately 37 minutes.


Q: Can I take other pain relievers while using Boots Paracetamol?

Official safety guides state that it is generally safe to use Paracetamol concurrently with other classes of painkillers, such as ibuprofen or codeine, provided the other medicine does not also contain paracetamol. Co-use with any other product containing paracetamol is strictly cautioned against in official labeling.


Q: Does Boots Paracetamol help with fever caused by a cold?

Yes. Official therapeutic indications include the treatment of most febrile conditions (fever) and symptoms associated with colds and influenza.


Q: What is the general evidence for paracetamol use in children?

The product is officially approved for use in the paediatric population. Official dosing protocols are based on the child's age and weight, which supports its established evidence for use in children for the relief of pain and fever.


Q: What should I do if my pain returns soon after taking Boots Paracetamol?

If pain returns, official instructions state that the minimum interval of 4 hours between doses must be strictly observed before another dose is taken. Adhering to this interval is essential to managing safety risks.


Q: Can people with kidney problems use Boots Paracetamol?

Official documents advise caution in patients with kidney problems. Dose adjustments, specifically a reduced dose or a prolonged interval between doses, are required for patients with severe renal impairment.


Q: If I'm taking herbal remedies, can I use Boots Paracetamol?

Official documents specifically list certain herbal products, such as St. John's Wort, as known interacting agents. Due to the wide variety of herbal remedies, consulting a healthcare professional is generally advised regarding concurrent use.


Q: How do official sources describe the expected benefits of Paracetamol?

Official documents describe the expected benefits as the symptomatic relief of pain of mild to moderate intensity and the reduction of fever.


Q: What are the general guidelines for children's use of paracetamol?

General guidelines confirm its use for fever and pain, emphasizing that dosing must be determined precisely by the child's age and weight. Strict adherence to maximum daily dose limits for children is required.


Q: Are there any known long-term drug interactions with Paracetamol?

Official documents note a specific interaction with blood-thinning medication (anticoagulants). The potential for enhancement of the anticoagulant effect of warfarin has been noted with prolonged regular use.


Q: Are there specific patient groups where Paracetamol is generally avoided?

Official product contraindications state that the drug should be avoided in patients who have known hypersensitivity to the drug, severe active liver disease, or certain liver diseases related to chronic, excessive alcohol consumption.

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How should Boots Paracetamol be stored and disposed of?

The storage and disposal of Boots Paracetamol are defined by specific regulatory requirements to maintain product stability and ensure public safety.

Storage Condition Requirement
Temperature Store at a temperature not exceeding 25 C (77 F)
Protection Protect from light and moisture; keep in the original packaging
Child Safety Must be kept out of the sight and reach of children

Storage below the mandated temperature and within the original container supports the product's labeled stability and ensures protection from environmental factors. For disposal, the regulatory instruction is to not dispose of unused or expired product via wastewater or household waste. Patients are directed to ask a pharmacist for the correct pharmaceutical waste handling procedure.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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