Thymanax

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Thymanax

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Method of action: Antidepressant, Psychoanaleptics

Treatment option:

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.

Overview of Thymanax

Property Description
Active ingredient Agomelatine (INN)
Form Film-coated tablets (Oral)
Pharmacological class Melatonergic Agonist and 5-HT2C Antagonist
General purpose Mood stabilization and circadian rhythm support
Origin Synthetic compound

Thymanax is a prescription psychotropic medicine intended for oral administration as film-coated tablets. Its sole active ingredient is Agomelatine, a synthetic compound chemically related to the natural hormone melatonin. The formulation of Thymanax as a film-coated tablet is designed for the reliable, systemic delivery of the active substance to achieve its effects within the central nervous system.


Thymanax's Pharmacological Class and General Purpose

Thymanax belongs to a distinct pharmacological class, defined by its unique action as a melatonergic MT1 and MT2 receptor agonist and a 5-HT2C receptor antagonist. Its general therapeutic role is that of a psychoanaleptic agent, recognized for its ability to promote mood stabilization. The specific focus of this medication on supporting the body's natural sleep-wake cycle provides a differentiating factor compared to many standard treatments.


How Agomelatine Differs from Other Antidepressants

Agomelatine's mechanism is considered novel because it directly stimulates the melatonin pathway, classifying it as a chronobiotic agent. This action fundamentally differs from widely used classes like Selective Serotonin Reuptake Inhibitors (SSRIs). Agomelatine's psychotropic effects are due to the synergy between its melatonergic and serotonergic properties, which contrasts with conventional antidepressants that mainly alter monoamine reuptake. This indicates that the medication offers a different route for stabilizing neurochemistry, a key factor when evaluating treatment options.

Regulatory References

  1. Thymanax (agomelatine) EPAR Summary

What side effects are possible with Thymanax?

Possible Side Effects and Safety Information

The safety profile of Thymanax (Agomelatine) is defined by its officially documented adverse reactions, which are classified by frequency and physiological system in regulatory documentation. Many adverse events, such as dizziness, somnolence (sleepiness), and nausea, are officially noted as being more frequently observed at the start of treatment.


Frequency and System-Organ Classes

The most common reactions involve the Nervous System and Gastrointestinal System. Reactions classified as Common (1/100 to <1/10) include headache, dizziness, insomnia, nausea, diarrhea, and increased hepatic transaminases. Uncommon (1/1,000 to <1/100) reactions include migraine, vomiting, blurred vision, and weight increase. The regulatory classifications also list events in the Psychiatric and Skin and Subcutaneous Tissue categories.


Serious Adverse Reactions and Liver Function

The most critical safety constraint relates to the Hepatobiliary System. Regulatory documents list Hepatitis (Rare) and Hepatic failure (Very Rare) as serious adverse reactions. Consequently, mandatory liver function monitoring is a specified requirement, including assessment before treatment initiation and at predetermined intervals during the initial months of treatment. Treatment initiation is formally restricted if hepatic transaminases (ALT/AST) exceed a defined Upper Limit of Normal (ULN).

Other serious adverse reactions documented as Rare include Suicidal Ideation/Behavior and Angioedema.


Population Safety Restrictions

Thymanax is contraindicated in patients with pre-existing severe hepatic impairment. Caution is also advised regarding the use of the medicine in older adults, particularly those aged 75 years and older.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory profile for Agomelatine overdose documents a specific set of clinical manifestations. Reported symptoms include central nervous system effects such as drowsiness (somnolence), agitation, anxiety, tension, and dizziness. Gastrointestinal signs like stomach pain (epigastralgia), along with fatigue, malaise, and cyanosis, are also described in official labeling. Severe outcomes, including severe liver reactions and hepatic failure, are possible complications that require urgent intervention.

Immediate medical attention must be sought for any suspected overdose, as explicitly stated in regulatory instructions. This action is mandated even if the individual appears asymptomatic, or if signs of potential liver injury are observed. Patients or caregivers must contact a doctor immediately or report to a hospital's Accident and Emergency department.

The official profile confirms that no specific antidote for agomelatine is known. Therefore, management relies entirely on symptomatic and routine supportive treatment. Overdose severity is noted to be increased when the drug is ingested with other substances. Regulatory experience is limited in patients ge 75 years.

Therapeutic Uses of Thymanax

Thymanax is commonly used to help with managing Major Depressive Episodes (MDE) in adult patients. This therapeutic use assists with symptomatic relief from core affective manifestations, and is applied in addressing pervasive feelings of sadness, emotional distress, and the persistent loss of interest or pleasure (anhedonia). The medication may also assist with managing recurrent manifestations during the continuation phase of treatment, supporting general well-being during symptomatic phases.

A relevant therapeutic domain involves symptoms that interfere with daily functioning, such as challenging sleep disturbances (difficulty falling asleep and early morning awakening) associated with depression. The medication is used for the management of the core symptoms of Major Depressive Disorder, especially in the context of associated sleep difficulties.

It supports the patient in managing sleep disturbances and contributes to improved comfort during periods of heightened symptoms. Furthermore, it provides supportive relief when symptoms create noticeable functional strain and is relevant for easing frequently co-occurring anxiety symptoms and **symptoms related to physical discomfort.


Quick Fact: Relief for Sleep Disturbances Thymanax is considered relevant in clinical settings marked by temporary physiological imbalance, particularly where depressive symptoms include pronounced sleep-wake cycle disruption.

Regulatory References

  1. European Medicines Agency (EMA) overview

Eligibility and Restrictions for Use

The official regulatory profile for Thymanax strictly defines who can and cannot use the medicine based on absolute contraindications and population restrictions. Use is officially restricted to adults between 18 and 75 years.


Eligibility Scope

Category Official Regulatory Statement
Populations for whom use is allowed Adults (18 to under 75 years).
Populations for whom use is contraindicated Patients with hepatic impairment (e.g., active liver disease); hypersensitivity; or if baseline transaminases exceed 3 imes ULN.
Age-related restrictions Not recommended for patients under 18 years or geq75 years (as no effect is documented).
Not recommended for elderly patients with dementia.
Condition-specific restrictions Contraindicated with concomitant use of potent CYP1A2 inhibitors. Caution required for use in moderate or severe renal impairment or with a history of bipolar disorder/mania.
Pregnancy and lactation status It is preferable to avoid during pregnancy; breast-feeding should be discontinued if treatment is considered necessary.

Eligibility Classifications

The medicine is contraindicated based on baseline liver function (transaminases) and the co-administration of potent CYP1A2 inhibitors. Use in children and the very elderly is not recommended due to efficacy or safety not being established.


Connection to the overall eligibility profile: Official regulatory documents establish absolute exclusions around hepatic function and drug co-administration. Eligibility is restricted to the adult population (18 to under 75 years), with use not recommended outside this range or in patients with dementia. Other groups, such as those with renal impairment, fall under a conditional eligibility status, mandating specific caution.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Property Description
Medicinal product categories with documented interactions Potent and moderate Cytochrome P450 1A2 (CYP1A2) Inhibitors; CYP1A2/CYP2C9/CYP2C19 Inducers; Oral Oestrogens; Alcohol.
Specific interacting medicines (if explicitly listed) Fluvoxamine, Ciprofloxacin, Propranolol, Enoxacin, Rifampicin.
Mechanistic basis of interactions (only if stated in label) Pharmacokinetic interaction driven by inhibition or induction of CYP1A2, the primary enzyme for Agomelatine metabolism.
Timing-based interaction rules (if applicable) None mandatory; the product may be taken with or without food.
Population-specific interaction notes (if applicable) Risk of hepatic injury requires caution in patients with alcohol use disorder or substantial alcohol intake.
Classification Description
Interaction severity classification (as defined in official documents) Contraindicated (with potent CYP1A2 inhibitors); Use with caution (with moderate CYP1A2 inhibitors or inducers).
Interaction-context constraints (as defined in official documents) Agomelatine is contraindicated in patients with pre-existing hepatic impairment or transaminases exceeding three times the upper limit of normal due to heightened metabolic risk.

Official interaction statements:

  • Co-administration with potent CYP1A2 inhibitors such as Fluvoxamine or Ciprofloxacin is formally contraindicated because the inhibition of metabolism significantly increases Agomelatine exposure.
  • Moderate CYP1A2 inhibitors, including oral Oestrogens, Propranolol, and Enoxacin, cause a several-fold increase in Agomelatine exposure.
  • Rifampicin (an inducer) and heavy smoking (> 15 cigarettes/day) are officially shown to decrease Agomelatine bioavailability.
  • The combination of Agomelatine and alcohol is not advisable due to the officially documented risk of hepatic injury.
  • No evidence of pharmacokinetic or pharmacodynamic interaction was found with Benzodiazepines, Lithium, Paroxetine, Fluconazole, or Theophylline.

Connection to the overall interaction profile: Regulatory documents define the product’s interaction structure primarily through its dependence on the CYP1A2 metabolic pathway, classifying interactions based on the degree of enzyme inhibition or induction. This pharmacokinetic constraint dictates the formal prohibition of potent inhibitors, the caution required for moderate inhibitors, and the effect of inducers like Rifampicin and smoking on bioavailability.

Mechanism of Action

Thymanax: Mechanism of Action

The pharmacodynamic mechanism of Thymanax involves a dual-action approach that modulates central nervous system (CNS) activity by simultaneously enhancing inhibition and suppressing excitation.

GABA

Thymanax acts as a Positive Allosteric Modulator of the GABA A receptor. By increasing the effect of the primary inhibitory neurotransmitter, GABA, the drug drives an increased influx of negative ions, causing postsynaptic neurons to become hyperpolarized and less responsive. This action engages the fundamental inhibitory circuitry and results in generalized CNS dampening and reduced arousal.

Concurrently, Thymanax functions as an inhibitor of voltage-gated L-type calcium channels ( VGCCs). By restricting the influx of calcium into the presynaptic terminal, the drug decreases the release of excitatory neurotransmitters, such as glutamate.

This modulation of the excitatory cascade contributes to reduced cellular excitability and a decreased frequency of neural signal transmission. The combined mechanism leads to a net effect of systemic CNS depression and observable physiological adjustments marked by a decreased neuronal firing rate.

Dosage and Administration Information

Thymanax (agomelatine) is administered orally as a film-coated tablet for use in adults. The dosing regimen is defined by a mandatory schedule: the medicine must be taken once daily at bedtime, which is a high-level constraint related to its intended chronobiotic effect. The tablets may be ingested with or without food.

The standard initial dose is 25 mg taken once daily. If symptom improvement is not observed after two weeks of treatment, the dose may be increased to the maximum recommended dose of 50 mg, which is administered as two 25 mg tablets taken together at bedtime. If a dose is missed, the patient should skip the missed dose and take the next scheduled dose at the usual bedtime; doubling the dose to compensate is not permitted.

Treatment must continue for a period of at least six months following the achievement of remission, and no dosage tapering is necessary when discontinuing the use of Thymanax. The administration protocol integrates mandatory procedural steps: Liver function tests (transaminases) must be performed before starting treatment, upon dose increase, and periodically thereafter. The medicine is not recommended for use in patients under 18 years of age or in those 75 years of age and older.

Recent Clinical Evidence

Research evidence / Overview of Studies for Thymanax

The research explores Agomelatine (Thymanax) in the context of Major Depressive Episodes (MDE) in adults, primarily through short-term Randomized Controlled Trials (RCTs). These studies compared the medicine to a dummy pill (placebo) and measured the severity of core depressive symptoms and rates of clinical response over 6 to 12 weeks. Systematic reviews of these trials describe patterns of measured change over placebo, but also note that the overall size of the difference in measured outcomes was characterized as small or marginally relevant in clinical terms. Findings were mixed across some individual trials, highlighting uncertainty regarding consistency.


A separate area of research examined short-term symptom patterns related to challenging sleep disturbances often associated with depression. These studies consistently reported changes measured in patient-reported outcomes for subjective sleep quality and insomnia symptoms. However, when researchers monitored objective sleep metrics, the findings were often mixed or inconsistent concerning measures like total sleep time.


For maintenance following initial improvement, long-term, placebo-controlled trials focused on tracking the time to relapse and the cumulative probability of recurrence. Some comprehensive systematic reviews note that the evidence available specifically for relapse prevention is limited and heterogeneous. Consequently, long-term effects are not fully established, and there is limited information for outcomes extending beyond one year.


The research explores use in certain groups, including elderly patients up to 75 years of age. However, data for certain groups remain insufficient, particularly for patients aged 75 years and older, where research data remain insufficient to draw conclusions. Furthermore, comparative evidence is lacking in terms of well-powered, head-to-head clinical trials against other standard treatments.

Key Studies & References

  1. Agomelatine: a novel mechanism of action for the treatment of depression.
  2. Relapse prevention with agomelatine in patients with major depressive disorder: a randomized, double-blind, placebo-controlled trial.

Frequently Asked Questions (FAQ)

Common questions about Thymanax (FAQ)

Q: How quickly does Thymanax typically start to show its intended effects?

Studies and official information indicate that a measured change in depressive symptoms compared to a dummy pill may be observed in the early stages of treatment. Official dosing guidance states that a review of the dosage may take place if symptom improvement is not yet observed after two weeks.


Q: What is the difference between Thymanax and [Specific Competitor Drug]?

Thymanax's active ingredient, agomelatine, is described in official documents as chemically distinct from commonly used treatments like Selective Serotonin Reuptake Inhibitors (SSRIs). It works through a unique melatonergic/serotonergic mechanism, which gives it a different pharmacological classification.


Q: What is the risk of dependence or withdrawal associated with Thymanax?

Official product information notes a low incidence of discontinuation or withdrawal symptoms reported in clinical studies upon abrupt cessation. Because of this, treatment guidelines state that dosage tapering is not typically required when discontinuing use.


Q: Are the initial side effects of Thymanax expected to fade after a few weeks?

Common adverse reactions, such as headache, nausea, and dizziness, are officially noted as being more frequently observed at the start of treatment. These effects are generally described in regulatory documents as transient, which suggests they typically resolve or lessen as the body adjusts to the medicine.


Q: Does Thymanax interact with caffeine or alcohol?

Regulatory documents state that co-administration with alcohol is not advised due to a potential increase in the risk of liver injury. Caffeine is not listed as a specifically documented interaction in the official product information.


Q: Why is Thymanax often prescribed instead of other options?

Official information describes the medicine as a chronobiotic agent with a unique and novel mechanism of action. Its classification as a melatonergic agonist and 5 -HT2 C antagonist differentiates it from conventional treatments, offering a different approach to mood support.


Q: What happens when Thymanax treatment is stopped?

Official product guidelines state that no dosage tapering is required when treatment is discontinued. This lack of a tapering requirement is a differentiating feature of the discontinuation process.


Q: Is there a maximum recommended period of time for taking Thymanax?

Regulatory documents specify that treatment should continue for a period of at least six months following the achievement of improvement. Clinical data to support the safety and effectiveness of treatment periods extending beyond one year is limited.


Q: Can Thymanax cause stomach upset, and if so, how is it managed?

Adverse events lists show that nausea, diarrhea, and abdominal pain are common side effects. Regulatory documents describe these effects as typically mild and transient. Official product information does not include specific management advice for these common symptoms.


Q: Is Thymanax a controlled substance?

Based on official regulatory schedules, the active ingredient, agomelatine, is not classified as a controlled substance in major jurisdictions. It is recognized as a prescription-only psychotropic medicine.


Q: What does 'contraindicated' mean regarding Thymanax?

The term 'contraindicated' is used in official documentation to describe a situation where the medicine must not be used. This is because using the medicine under these specific circumstances (like having severe hepatic impairment or taking certain interacting drugs) poses a significant and documented health risk.


Q: Does Thymanax interact with common pain relievers like ibuprofen?

The known interactions are driven primarily by the medicine's dependence on the CYP1A2 metabolic pathway. Regulatory interaction lists do not specifically name ibuprofen or other common non-steroidal anti-inflammatory drugs (NSAIDs) as interacting medicines.


Q: Why are the instructions about Thymanax use so strict?

The use instructions are strict, particularly those concerning the mandatory liver function tests (LFTs), due to the officially documented risk of liver toxicity. This monitoring is required to detect early signs of a serious, though very rare, adverse reaction like hepatic failure.


Q: Does Thymanax affect a person's ability to drive or operate machinery?

Official safety documents caution that the medicine can cause side effects like dizziness and somnolence (sleepiness). Regulatory documents indicate that caution is advised, and patients should assess the impact of these potential effects on their ability to perform skilled tasks such as driving.


Q: What is the half-life of Thymanax, and why is that important?

Pharmacokinetic data indicates the half-life of agomelatine is short, approximately 1–2 hours. This property helps explain the medicine's required once-daily dosing at bedtime, which is intended to optimize its effect on the sleep-wake cycle.

How should Thymanax be stored and disposed of?

Official Storage Requirements

Thymanax must be stored at Controlled Room Temperature, typically defined as 20 C to 25 C (68 F to 77 F). The product must be protected from excessive moisture and kept in its original, tightly closed container to preserve stability until the expiration date. It is strictly required that you Do not freeze Thymanax.

Protecting from Children

It is mandatory to keep Thymanax out of the reach and sight of children at all times.

Disposal Instructions

Expired or unused Thymanax should be disposed of via an authorized drug take-back program (e.g., pharmacy or police collection points). If a take-back program is unavailable, follow official instructions to mix the medicine with an unappealing substance, place it in a sealed container, and discard it in the household trash. Do not dispose of Thymanax by flushing it down a toilet or pouring it down a drain.

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

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