Tradonal Retard

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Tradonal Retard

Treatment option: Pain, Chronic Pain

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

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.

Overview of Tradonal Retard

Quick Facts

Property Description
Active ingredient Tramadol Hydrochloride
Form Modified-release tablet or capsule
Pharmacological class Opioid analgesic (Centrally acting)
General purpose Alleviating moderate to severe pain
Origin Synthetic codeine analogue

The Active Ingredient and Pharmacological Class

Tradonal Retard is a centrally acting analgesic whose therapeutic effect stems from its single active substance, Tramadol Hydrochloride, a synthetic compound. This medication is classified as an opioid analgesic and is primarily utilized for the management of moderate to severe pain.

The drug’s identity is anchored in its pharmacological action, which involves modifying pain signals in the central nervous system. As a prescription-only medication, its use is typically seen in scenarios requiring sustained, powerful relief, such as pain following major surgery or discomfort associated with chronic conditions, which distinguishes its application from basic, over-the-counter pain relievers.

Understanding the "Retard" Prolonged-Release Form

The name Tradonal Retard specifically designates the pharmaceutical form as a modified-release tablet or prolonged-release capsule, designed for oral use. This structure is fundamental to the drug's therapeutic profile, setting it apart from immediate-release formulations.

The term "Retard" indicates a specialized delivery system engineered to release the Tramadol Hydrochloride slowly and consistently over an extended period, a key property of controlled-release formulations. This mechanism is intended to sustain stable concentrations of the drug, providing continuous pain relief for patients managing persistent or chronic pain and ensuring a steady therapeutic effect over a longer duration, often allowing for administration just once or twice daily.

What side effects are possible with Tradonal Retard?

Possible Side Effects and Safety Information

The safety profile of Tradonal Retard is formally defined by regulatory documents, classifying reported adverse events by expected frequency and detailing specific warnings regarding serious risks and population-specific considerations. Adverse reactions are grouped by the affected System-Organ Class (SOC) for regulatory reporting purposes.


Adverse Reaction Scope

Classification Officially Documented Effects
Very Common (ge 1/10) Dizziness, Nausea
Common (ge 1/100 to < 1/10) Headache, Somnolence (drowsiness), Vomiting, Constipation, Dry mouth, Increased sweating
Serious Risks Respiratory Depression, Seizures, Serotonin Syndrome, Drug Dependence, Neonatal Opioid Withdrawal Syndrome

Regulatory Safety Summary

  • Time- or Exposure-Related Patterns: Side effects such as dizziness and nausea are officially noted as more frequently observed at the start of treatment and during any period of dose escalation. The development of tolerance and physical dependence is associated with prolonged use.
  • Organ Systems: Officially classified adverse events span Nervous system disorders (e.g., dizziness, headache), Gastrointestinal disorders (e.g., nausea, constipation), Psychiatric disorders, and Cardiac disorders.
  • Population Constraints: Safety constraints are explicitly defined for individuals with severe hepatic impairment, severe renal impairment, and those with a history of uncontrolled epilepsy. Use in children younger than 12 years of age is officially contraindicated.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory profile for Tradonal Retard (Tramadol Hydrochloride) overdose focuses on severe, life-threatening manifestations requiring immediate action. Any suspected overdose, or the appearance of severe symptoms, requires that immediate medical attention must be sought.

Documented Overdose Manifestations

System Affected Severe Signs/Symptoms
Central Nervous System Consciousness disorders (including coma), profound sedation, and seizures/convulsions.
Respiratory/Cardiac Life-threatening respiratory depression, respiratory arrest, cardiovascular collapse, and severe hypotension.
Other Miosis (pinpoint pupils) and the potential for a severe outcome known as Serotonin Syndrome.

Emergency Actions and Overdose Risks

The primary regulatory concern is the risk of fatal overdose due to respiratory depression. Management is officially described as symptomatic and supportive treatment. While the antagonist Naloxone may be used for respiratory depression, official labeling notes its action is only partially antagonistic to the drug's effects and carries a risk of increasing seizures.

Furthermore, regulatory guidance states that haemodialysis or haemofiltration alone is not suitable for detoxification. Special warnings are noted for accidental ingestion by children, which can result in a fatal outcome, and for the elderly, who face an increased risk of severe respiratory depression.

Therapeutic Uses of Tradonal Retard

What Tradonal Retard Treats: Main Uses and Benefits

Tradonal Retard, a modified-release opioid analgesic, is commonly used in situations involving certain distressing symptoms and is applied in contexts involving heightened systemic burden. This analgesic is commonly used to help with moderate to severe pain associated with conditions characterized by periods of heightened symptoms, such as ongoing discomfort from arthritic diseases, cancer-related pain, or acute severe pain following major surgical procedures.

The prolonged-release form is particularly relevant when continuous symptom management is appropriate, especially in situations where pain severity requires additional supportive management.

The prolonged-release form offers symptomatic relief that supports patients during difficult, ongoing episodes. This may assist with maintaining functional stability and contributes to easing the overall symptom load. For patients with chronic painful conditions:

“The steady therapeutic effect of this medication supports patients by easing the overall symptom load and supports general well-being during symptomatic phases.”


Quick Fact: Relief for Persistent Moderate to Severe Pain

Scope Description
Symptom Level Moderate to severe pain intensity.
Use Context Chronic, ongoing pain and acute, severe post-operative pain.
Main Benefit Assists with continuous symptomatic management and maintaining functional stability.

Regulatory References

  1. Australian Product Information for Tramal SR

Eligibility and Restrictions for Use

Eligibility for Tradonal Retard

Tradonal Retard (tramadol extended-release) is an analgesic primarily intended for use in adults and adolescents above 12 years of age, though some formulations recommend use only for those 14 years and older.

Populations Who Must NOT Use This Medicine (Contraindications)

Use of this medicine is strictly contraindicated in several specific populations, according to official regulatory labeling:

  • Children younger than 12 years of age (and younger than 18 for post-operative management following tonsillectomy/adenoidectomy).
  • Patients with acute intoxication from alcohol, sleeping pills, other opioids, or psychotropic medicines.
  • Patients who are currently taking Monoamine Oxidase Inhibitors (MAOIs) or have taken them within the last 14 days.
  • Patients with severe respiratory depression or acute, severe bronchial asthma.
  • Individuals with a known hypersensitivity to the active substance (tramadol).

Restricted Use and Special Consideration

Use is not recommended or requires special caution in the following groups:

  • Patients with severe renal or severe hepatic insufficiency.
  • Pregnant or breastfeeding women.
  • Patients with epilepsy that is not adequately controlled by treatment.

In these restricted cases, the regulatory documents indicate that elimination of the medicine is delayed or the risk of serious side effects is heightened, requiring a clinician to carefully weigh the risks or adjust the dosage interval.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The active substance, Tramadol Hydrochloride, has officially documented interaction patterns primarily involving pharmacodynamic effects and metabolic pathways. These interactions impose specific restrictions on co-administration with other substances.


Contraindications and Restrictions

Classification Interacting Substance Regulatory Constraint
Contraindicated Monoamine Oxidase Inhibitors (MAOIs) Must not be used concurrently or within 14 days of stopping an MAOI (including Linezolid and Methylene Blue).
Significant Risk CNS Depressants and Alcohol Co-administration risks profound sedation, respiratory depression, and coma.
Significant Risk Serotonergic Drugs (e.g., SSRIs, SNRIs, Triptans) Increases the documented risk of Serotonin Syndrome and seizures.
Significant Risk Anticoagulants (Coumarin Derivatives) Documented reports of changes in anticoagulant effect, including increased Prothrombin Time (INR).

Metabolic and Exposure Alteration

Tramadol metabolism involves CYP2D6 and CYP3A4 enzymes. Inhibitors of these enzymes (such as Ketoconazole or Fluoxetine) may officially increase the parent drug's exposure, while inducers (like Carbamazepine) may significantly reduce the analgesic effect, making co-administration of Carbamazepine not recommended. The extended-release formulation is not recommended for use in patients with severe renal impairment (creatinine clearance <30 mL/min) or severe hepatic impairment due to the officially noted risk of altered clearance.

Mechanism of Action

Dual-Target Central Action

This drug operates through two distinct mechanisms within the central nervous system (CNS). The primary action involves the drug and its active metabolite functioning as an agonist on the mu-opioid receptor (mu-OR), a protein target on nerve cells in the brain and spinal cord. The secondary mechanism involves the parent compound acting as a reuptake inhibitor of the neurotransmitters serotonin (via SERT) and norepinephrine (via NET). This dual-target molecular cascade directly intervenes in signal processing.

Modulating Descending Inhibitory Pathways

Activation of the mu-OR directly reduces the excitability of signal-transmitting neurons. Concurrently, the inhibition of serotonin and norepinephrine reuptake amplifies the activity of the descending inhibitory pathways, which are neural systems that modulate ascending signal flow in the spinal cord. By increasing the functional concentration of these monoamines and simultaneously activating the mu-opioid receptor, the drug results in the modulation of nerve signal transmission. The combined effect is a change in the transmission and processing of afferent signals within the CNS, contributing to altered signal processing.

Dosage and Administration Information

How to Use Tradonal Retard: Administration Guidelines

Tradonal Retard is an analgesic intended for oral administration as a modified-release tablet or capsule, designed for management requiring daily, around-the-clock treatment. The extended-release formulation dictates a strict once-daily dosing frequency.

Dosing and Scheduling

Treatment initiation for opioid-naïve adults typically begins with a dose of 100 mg once daily. When dose adjustment is necessary, it is structured to occur in 100 mg increments with a minimum interval of five days between increases. The total dose is constrained by a maximum of 300 mg per day for the extended-release form. For patients converting from an immediate-release formulation, the initial extended-release dose is calculated based on the total 24-hour dose and rounded down to the nearest available 100 mg strength.

Administration Requirements and Constraints

The physical integrity of the medication is central to its correct usage. The tablet or capsule must be swallowed whole with liquid and must not be cut, crushed, chewed, or dissolved; modifying the form compromises the controlled release of the active substance.

While the medicine may be taken without regard to meals, maintaining a consistent time of administration each day is recommended.

Population-Specific Constraints

Specific constraints exist for certain populations. The use of the extended-release product is not recommended in the presence of severe renal impairment (creatinine clearance less than 30 mL/min) or severe hepatic impairment, due to the inflexible nature of its fixed dosing strengths.

Recent Clinical Evidence

Research Evidence / Overview of Studies

General Efficacy Findings

Research has investigated the drug's impact on symptoms reported in acute conditions. These studies evaluated patient outcomes, with some findings indicating a difference in discomfort over the study period. A multi-center study on the sustained-release formulation in various pain conditions found an observed analgesic effect in a high percentage of patients.

  • Studies focusing on short-term use examined the time until symptom metrics changed.
  • One study specifically examined whether the combination related to changes in pain metrics at a faster rate compared to monotherapy.

Research into Pharmacodynamics and Bioavailability

Studies explored the drug's interaction with a specific biological target. This interaction was associated with differences in reported measures of inflammation. Tramadol, the active ingredient, functions as a centrally acting opioid analgesic, which is thought to contribute to its activity.

  • The drug formulation was evaluated for bioavailability compared to older generations. Results showed differences in plasma concentrations.
  • Research has explored whether the drug's half-life influenced the required dosing schedule examined in the trials.

Studies in Specific Patient Subgroups

Chronic Condition Research

For chronic conditions, research examined whether the drug influenced the frequency of flares. Findings were mixed, with some trials showing an association between drug use and fewer reported events, while others did not. Evidence remains limited regarding long-term outcomes.

Safety and Tolerability Profiles

In the studies, safety data indicated a certain profile of adverse events, and the trials established specific criteria for enrollment. Reported adverse events in the studies included gastrointestinal upset and headache. Severe adverse events, such as respiratory depression and convulsions, have been reported and are subject to regulatory warnings. Opioid use disorder (OUD) may develop upon repeated administration.

Frequently Asked Questions (FAQ)

Common questions about Tradonal Retard (FAQ)

Q: Are there any foods or drinks that should be avoided while taking Tradonal Retard?

Official regulatory documents confirm that the medicine may be taken without regard to meals (food). However, official warnings state that the use of alcohol is strongly advised against while taking this medication. Combining the medication with alcohol is associated with a significant risk of profound sedation, respiratory depression, and coma.

Q: How long does it typically take to feel the effects of Tradonal Retard?

As an extended-release formulation, the medication is engineered to release its active ingredient slowly and consistently over a long period. According to official studies on pharmacokinetics, the time it takes for the medicine to reach its peak concentration in the blood is approximately 12 to 24 hours. This formulation is intended to provide sustained, continuous pain relief rather than rapid onset.

Q: Is Tradonal Retard considered a high-risk medication?

Official regulatory documents include a Boxed Warning, which is the highest level of caution. This is included because the medicine is classified as an opioid analgesic and is associated with serious risks. These risks include the potential for addiction, abuse, misuse, and life-threatening respiratory depression.

Q: Can I drive or operate machinery after taking Tradonal Retard?

Regulatory documents include a caution regarding activities that require full mental and physical ability. This is because side effects like dizziness and somnolence (drowsiness) are commonly reported. Official guidance states that due to these effects, the medication may impair a patient's ability to drive or operate complex machinery.

Q: What distinguishes the safety profile of Tradonal Retard from standard NSAIDs?

The medicine is classified as a centrally acting opioid analgesic, which differentiates it from common pain relievers like NSAIDs. Due to its mechanism of action, its safety profile is subject to specific regulatory warnings. These serious warnings include the potential for respiratory depression (slowed or shallow breathing), physical dependence, and seizures.

Q: Are there known genetic factors that affect how Tradonal Retard works?

Yes, official documents explicitly mention that the drug’s processing (metabolism) relies on the CYP2D6 enzyme in the liver. Genetic variation in the activity of this enzyme is known to occur in some individuals. This variation is known to potentially result in some individuals (ultra-rapid metabolizers) processing the medicine too quickly, which may lead to dangerously high levels of the active substance.

Q: Can Tradonal Retard cause changes in mood or anxiety levels?

Yes, adverse event reporting documents include effects categorized under Psychiatric disorders. Official reporting has specifically noted effects such as anxiety, agitation, and nervousness. Changes in mood have also been reported in clinical experience.

Q: Why are some people advised to start with a very low dose?

The official starting dose and the required slow increase in dose are part of the regulatory guidance. This titration process is designed to help patients adjust to the medicine and minimize the risk of initial adverse events. This approach specifically aims to reduce the frequency of common side effects, such as dizziness and nausea, and to mitigate the risk of seizure.

Q: What happens if I miss a dose of Tradonal Retard?

According to official patient safety guidance, if a dose is missed, it should be taken as soon as the patient remembers it. However, if it is nearly time for the next scheduled dose, the missed dose should be skipped entirely. Official guidance emphasizes that taking two doses at one time to compensate for a missed dose is generally advised against.

Q: Are there special warnings about using this medicine for older adults?

Official regulatory documents include a section dedicated to Geriatric Use for patients 65 years of age and older. This guidance suggests that caution should be used when determining the dose. This is largely because older patients may have a greater frequency of decreased kidney, liver, or heart function, which can affect how the medicine is processed.

Q: Can Tradonal Retard be taken with paracetamol (acetaminophen)?

Official regulatory documents list specific warnings for co-administration with CNS depressants, alcohol, and serotonergic drugs. However, there is no specific contraindication or major drug-drug interaction warning listed in regulatory documents for combining this medicine with paracetamol (acetaminophen).

Q: Can Tradonal Retard interfere with birth control pills?

According to official regulatory documents detailing drug interactions, hormonal contraceptives (birth control pills) are not listed as a substance whose effectiveness is significantly altered by co-administration with this medication.

Q: What should I do if I experience a severe, unexpected side effect?

Official safety guidance advises that immediate medical attention should be sought if a patient experiences any signs of a serious adverse event. These events may include slowed or shallow breathing, seizures (convulsions), or signs of a severe allergic reaction, such as swelling of the face, tongue, or throat.

Q: Why is Tradonal Retard sometimes used for non-pain conditions?

Regulatory bodies have authorized the use of Tradonal Retard exclusively for the management of moderate to severe pain that requires continuous, around-the-clock treatment. Official product documents do not define or approve the use of this medication for any non-pain related medical conditions.

Q: Do official documents mention a maximum recommended treatment duration?

Official guidance documents generally do not specify a maximum number of days or months for which this medicine can be used. Instead, regulatory principles emphasize that due to the risk of tolerance and dependence, use should be limited to the shortest duration possible while still meeting the individual patient's pain treatment goals.

Q: Are there any blood tests required before or during treatment with Tradonal Retard?

While there is no general requirement for blood tests for all patients, some specific situations require monitoring. Regulatory documents state that if the medicine is taken alongside anticoagulants, laboratory monitoring of coagulation metrics (like the INR) may be needed. Furthermore, assessment of kidney and liver function is necessary, as the medicine is not recommended in cases of severe impairment.

Q: Is Tradonal Retard a Schedule IV controlled substance in the US?

Yes, in the United States, the active ingredient in this medication is formally classified as a Schedule IV controlled substance by the Drug Enforcement Administration (DEA). This classification reflects the drug's approved medical use while recognizing its potential for abuse and dependence.

Q: What should I tell my dentist or surgeon before a procedure if I take Tradonal Retard?

Official patient safety guidance suggests that informing all healthcare providers, including dentists, surgeons, and emergency personnel, about the medication is a critical safety measure. This is particularly important before any procedure that involves anesthesia or the use of other medications that affect the central nervous system (CNS).

Q: How common is it for patients to stop taking the medicine due to side effects?

Official summaries of clinical trials reported that a specific percentage of patients discontinued treatment due to adverse events. The side effects most frequently cited for discontinuation were common gastrointestinal issues, specifically nausea and vomiting, and neurological effects like dizziness.

Q: Are there any contraindications related to heart conditions?

Official regulatory documents list strict contraindications for the medicine (e.g., severe respiratory depression, MAOI use). However, they do not list common heart conditions as a specific reason to strictly avoid the drug. Some reported adverse events are categorized under the general system-organ class of Cardiac disorders.

Q: Can Tradonal Retard affect the results of a drug test?

The active ingredient is classified as a centrally acting opioid analgesic, and it is possible that it may be detectable on certain drug screening tests. Official safety guidance suggests informing the testing facility or healthcare provider about all prescription medicines currently being taken.

Q: What are the requirements for prescribing Tradonal Retard?

In the US, the prescribing process is governed by specific regulatory mandates for opioids. This includes the Risk Evaluation and Mitigation Strategy (REMS) program, which requires that healthcare professionals receive education on the serious risks associated with the medicine, such as the potential for addiction, abuse, and misuse.

Q: Can Tradonal Retard cause changes to blood pressure?

Yes, adverse event reporting documents indicate that the medicine can cause changes to blood pressure. Reported effects include both hypotension (a drop in blood pressure) and, less commonly, hypertension (an increase in blood pressure). These effects are categorized by regulatory bodies under the Vascular disorders system-organ class.

Q: What if I vomit shortly after taking Tradonal Retard?

Official patient guidance advises that if the modified-release tablet is vomited soon after being swallowed, a replacement dose is generally not recommended. The patient should wait and take their next dose at the regularly scheduled time.

Q: How long does it take for Tradonal Retard to be completely eliminated from the body?

According to pharmacokinetic studies, the half-life (the time it takes for half the medicine to be eliminated) of the active substance is approximately 6 to 7 hours. For patients with normal organ function, it typically takes about two days for the medicine and its active breakdown product (metabolite) to be completely cleared from the body.

Q: Do regulatory bodies issue warnings about combining Tradonal Retard with supplements?

Official regulatory warnings focus on substances that interact with the medicine’s metabolism through the CYP2D6 and CYP3A4 enzymes. Certain herbal or dietary supplements are known to affect these same enzymes, which could potentially alter the concentration of the medicine in the body.

Q: What does official guidance say about stopping Tradonal Retard suddenly?

Regulatory documents advise that suddenly stopping the medicine after prolonged use is strongly discouraged. Official guidance emphasizes that the dosage is typically slowly and gradually reduced, a process known as tapering, under the care of a healthcare professional.

How should Tradonal Retard be stored and disposed of?

Storage and Disposal of Tradonal Retard

Official Storage Requirements

Tradonal Retard (tramadol prolonged-release) must be stored at room temperature, protected from excessive moisture and light. It is mandatory to keep the medicine in a closed container and out of the sight and reach of children due to the high risk of fatal overdose from accidental ingestion. The product must not be frozen and should not be used past the labeled expiry date.

Official Disposal Instructions

Expired or unused Tradonal Retard must not be thrown away via household waste or wastewater to prevent environmental harm and accidental exposure. The official instruction is to utilize an authorized drug take-back program or to consult a pharmacist for proper disposal methods.

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

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