Thymanax 25 mg film-coated tablets
Each film-coated tablet contains 25 mg of agomelatine. Excipient with known effect: each tablet contains 61.84 mg lactose (as monohydrate) For the full list of excipients, see section 6.1.
Film-coated tablet [tablet]. Orange-yellow, oblong, 9.5 mm long, 5.1 mm wide film-coated tablet with blue imprint of company logo on one side.
Treatment of major depressive episodes. Thymanax is indicated in adults.
Posology
The recommended dose is 25 mg once daily taken orally at bedtime. After two weeks of treatment, if there is no improvement of symptoms, the dose may be increased to 50 mg once daily, i.e. two 25 mg tablets, taken together at bedtime. Decision of dose increase has to be balanced with a higher risk of transaminases elevation. Any dose increase to 50 mg should be made on an individual patient benefit/risk basis and with strict respect of LFT monitoring. Liver function tests should be performed in all patients : at initiation of treatment, and then periodically after around three weeks, six weeks (end of acute phase), twelve weeks and twenty four weeks (end of maintenance phase) and thereafter when clinically indicated (see also section 4.4). When increasing the dosage, liver function tests should again be performed at the same frequency as when initiating treatment.
Treatment duration
Patients with depression should be treated for a sufficient period of at least 6 months to ensure that they are free of symptoms.
Treatment discontinuation
No dosage tapering is needed on treatment discontinuation.
Special populations
Older people
The efficacy and safety of agomelatine (25 to 50mg/day) have been established in elderly depressed patients (< 75years). No effect is documented in patients >=75 years. Therefore agomelatine should not be used by patients in this age group (see sections 4.4 and 5.1). No dose adjustment is required in relation to age (see section 5.2).
Renal impairment
No relevant modification in agomelatine pharmacokinetic parameters in patients with severe renal impairment has been observed. However, only limited clinical data on the use of Thymanax in depressed patients with severe or moderate renal impairment with major depressive episodes is available. Therefore, caution should be exercised when prescribing Thymanax to these patients.
Hepatic impairment
Thymanax is contraindicated in patients with hepatic impairment (see sections 4.3, 4.4 and 5.2).
Paediatric population
The safety and efficacy of Thymanax in children from 2 years onwards for treatment of major depressive episodes have not yet been established. No data are available (see section 4.4). There is no relevant use of Thymanax in children from birth to 2 years for treatment of major depressive episodes.
Method of administration
For oral use.
Thymanax film-coated tablets may be taken with or without food.
Hypersensitivity to the active substance or to any of the excipients listed in section 6.1. Hepatic impairment (i.e. cirrhosis or active liver disease) or transaminases exceeding 3 X upper limit of normal (see sections 4.2 and 4.4). Concomitant use of potent CYP1A2 inhibitors (e.g. fluvoxamine, ciprofloxacin) (see section 4.5).
Monitoring of liver function
Cases of liver injury, including hepatic failure (few cases were exceptionally reported with fatal outcome or liver transplantation in patients with hepatic risk factors), elevations of liver enzymes exceeding 10 times upper limit of normal, hepatitis and jaundice have been reported in patients treated with Thymanax in the post-marketing setting (see section 4.8). Most of them occurred during the first months of treatment. The pattern of liver damage was predominantly hepatocellular. When Thymanax was discontinued in these patients, the serum transaminases usually returned to normal levels. Liver function tests should be performed in all patients: at initiation of treatment and then periodically after around three weeks, six weeks (end of acute phase), after around twelve and twenty four weeks (end of maintenance phase) and thereafter when clinically indicated. When increasing the dosage, liver function tests should again be performed at the same frequency as when initiating treatment.Any patient who develops increased serum transaminases should have his/her liver function tests repeated within 48 hours. Therapy should be discontinued if the increase in serum transaminases exceeds 3X upper limit of normal and liver function tests should be performed regularly until serum transaminases return to normal. If symptoms or signs of potential liver injury (such as dark urine, light coloured stools, yellow skin/eyes, pain in the upper right belly, sustained new-onset and unexplained fatigue) are present, Thymanax treatment should be discontinued immediately. Caution should be exercised when Thymanax is administered to patients with pretreatment elevated transaminases (> the upper limit of the normal ranges and <=3 times the upper limit of the normal range). Caution should be exercised when prescribing Thymanax for patients with hepatic injury risk factors e.g. obesity/overweight/non-alcoholic fatty liver disease, diabetes, substantial alcohol intake or concomitant medicinal products associated with risk of hepatic injury.
Use in paediatric population
Thymanax is not recommended in the treatment of depression in patients under 18 years of age since safety and efficacy of Thymanax have not been established in this age group. In clinical trials among children and adolescents treated with other antidepressants, suicide-related behaviour (suicide attempt and suicidal thoughts), and hostility (predominantly aggression, oppositional behaviour and anger) were more frequently observed compared to those treated with placebo (see section 4.2).
Older people
No effect of agomelatine is documented in patients >=75 years, therefore agomelatine should not be used by patients in this age group (see also sections 4.2 and 5.1).
Use in older people with dementia
Thymanax should not be used for the treatment of major depressive episodes in elderly patients with dementia since the safety and efficacy of Thymanax have not been established in these patients.
Bipolar disorder/ mania / hypomania
Thymanax should be used with caution in patients with a history of bipolar disorder, mania or hypomania and should be discontinued if a patient develops manic symptoms (see section 4.8).
Suicide/suicidal thoughts
Depression is associated with an increased risk of suicidal thoughts, self harm and suicide (suicide- related events). This risk persists until significant remission occurs. As improvement may not occur during the first few weeks or more of treatment, patients should be closely monitored until such improvement occurs. It is general clinical experience that the risk of suicide may increase in the early stages of recovery. Patients with a history of suicide-related events or those exhibiting a significant degree of suicidal ideation prior to commencement of treatment are known to be at greater risk of suicidal thoughts or suicide attempts, and should receive careful monitoring during treatment. A meta-analysis of placebo- controlled clinical trials of antidepressants in adult patients with psychiatric disorders showed an increased risk of suicidal behaviour with antidepressants compared to placebo, in patients less than 25 years old. Close supervision of patients and in particular those at high risk should accompany treatment especially in early treatment and following dose changes. Patients (and caregivers of patients) should be alerted to the need to monitor for any clinical worsening, suicidal behaviour or thoughts and unusual changes in behaviour and to seek medical advice immediately if these symptoms present.
Combination with CYP1A2 inhibitors (see sections 4.3 and 4.5)
Caution should be exercised when prescribing Thymanax with moderate CYP1A2 inhibitors (e.g. propranolol, grepafloxacine, enoxacine) which may result in increased exposure of agomelatine.
Lactose intolerance
Thymanax contains lactose. Patients with rare hereditary problems of galactose intolerance, the Lapp lactase deficiency or glucose-galactose malabsorption should not take this medicine.
Potential interactions affecting agomelatine
Agomelatine is metabolised mainly by cytochrome P450 1A2 (CYP1A2) (90%) and by CYP2C9/19 (10%). Medicinal products that interact with these isoenzymes may decrease or increase the bioavailability of agomelatine. Fluvoxamine, a potent CYP1A2 and moderate CYP2C9 inhibitor markedly inhibits the metabolism of agomelatine resulting in a 60-fold (range 12-412) increase of agomelatine exposure. Consequently, co-administration of Thymanax with potent CYP1A2 inhibitors (e.g. fluvoxamine, ciprofloxacin) is contraindicated. Combination of agomelatine with oestrogens (moderate CYP1A2 inhibitors) results in a several fold increased exposure of agomelatine. While there was no specific safety signal in the 800 patients treated in combination with oestrogens, caution should be exercised when prescribing agomelatine with other moderate CYP1A2 inhibitors (e.g. propranolol, grepafloxacine, enoxacine) until more experience has been gained (see section 4.4). Rifampicin an inducer of all three cytochromes involved in the metabolism of agomelatine may decrease the bioavailability of agomelatine. Smoking induces CYP1A2 and has been shown to decrease the bioavailability of agomelatine, especially in heavy smokers (> 15 cigarettes/day) (see section 5.2).
Potential for agomelatine to affect other medicinal products
In vivo, agomelatine does not induce CYP450 isoenzymes. Agomelatine inhibits neither CYP1A2 in vivo nor the other CYP450 in vitro. Therefore, agomelatine will not modify exposure to medicinal products metabolised by CYP 450.
Medicinal products highly bound to plasma protein
Agomelatine does not modify free concentrations of medicinal products highly bound to plasma proteins or vice versa.
Other medicinal products
No evidence of pharmacokinetic or pharmacodynamic interaction with medicinal products which could be prescribed concomitantly with Thymanax in the target population was found in phase I clinical trials: benzodiazepines, lithium, paroxetine, fluconazole and theophylline.
Alcohol
The combination of Thymanax and alcohol is not advisable.
Electroconvulsive therapy (ECT)
There is no experience of concurrent use of agomelatine with ECT. Animal studies have not shown proconvulsant properties (see section 5.3). Therefore, clinical consequences of ECT concomitant treatment with Thymanax are considered to be unlikely.
Paediatric population
Interaction studies have only been performed in adults.
Pregnancy
There are no or limited amount of data (less than 300 pregnancy outcomes) from the use of agomelatine in pregnant women. Animal studies do not indicate direct or indirect harmful effects with respect to pregnancy, embryonal/foetal development, parturition or postnatal development (see section 5.3). As a precautionary measure, it is preferable to avoid the use of Thymanax during pregnancy.
Breast-feeding
It is not known whether agomelatine/ metabolites are excreted in human milk. Available pharmacodynamic/toxicological data in animals have shown excretion of agomelatine/metabolites in milk (see section 5.3). A risk to the newborns/infants cannot be excluded. A decision must be made whether to discontinue breast-feeding or to discontinue/abstain from Thymanax therapy taking into account the benefit of breast feeding for the child and the benefit of therapy for the woman.
Fertility
Reproduction studies in the rat and the rabbit showed no effect of agomelatine on fertility (see section 5.3).
No studies on the effects on the ability to drive and use machines have been performed. However, considering that dizziness and somnolence are common adverse reactions patients should be cautioned about their ability to drive a car or operate machinery.
Summary of the safety profile
In clinical trials, over 7,900 depressed patients have received Thymanax. Adverse reactions were usually mild or moderate and occurred within the first two weeks of treatment. The most common adverse reactions were nausea and dizziness. These adverse reactions were usually transient and did not generally lead to cessation of therapy.
Tabulated list of adverse reactions
Adverse reactions are listed below using the following convention: very common (>=1/10); common (>=1/100 to <1/10); uncommon (>=1/1,000 to <1/100); rare (>=1/10,000 to <1/1,000); very rare (<1/10,000), not known (cannot be estimated from the available data). The frequencies have not been corrected for placebo.
| System organ class | Frequency | Preferred Term |
| Psychiatric disorders | Common | Anxiety |
| Uncommon | Agitation and related symptoms * (such as irritability and restlessness) | |
| Aggression * | ||
| Nightmares * | ||
| Abnormal dreams * | ||
| Rare | Mania/hypomania * These symptoms may also be due to the underlying disease (see section 4.4). | |
| Hallucinations * | ||
| Frequency not known | Suicidal thoughts or behaviour (see section 4.4) | |
| Nervous system disorders | Common | Headache |
| Dizziness | ||
| Somnolence | ||
| Insomnia | ||
| Migraine | ||
| Uncommon | Paraesthesia | |
| Restless leg syndrome * | ||
| Eyes disorders | Uncommon | Blurred vision |
| Ear and vestibular system disorders | Uncommon | Tinnitus * |
| Gastrointestinal Disorders | Common | Nausea |
| Diarrhoea | ||
| Constipation | ||
| Abdominal pain | ||
| Vomiting * | ||
| Hepato- biliary disorders | Common | Increased ALAT and/or ASAT (in clinical trials, increases >3 times the upper limit of the normal range for ALAT and/or ASAT were seen in 1.4% of patients on agomelatine 25 mg daily and 2.5 % on agomelatine 50 mg daily vs. 0.6% on placebo). |
| Rare | Hepatitis | |
| Increased gamma-glutamyltransferase * (GGT)(>3 times the upper limit of the normal range | ||
| Increased alkaline phosphatase * (>3 times the upper limit of the normal range) | ||
| Hepatic failure *(1) | ||
| Jaundice * | ||
| Skin and subcutaneous tissue disorders | Common | Hyperhidrosis |
| Uncommon | Eczema | |
| Pruritus * | ||
| Urticaria * | ||
| Rare | Erythematous rash | |
| Face oedema and angioedema * | ||
| Musculoskeletal and connective tissue disorders | Common | Back pain |
| General disorders and administration site conditions | Common | Fatigue |
| Investigations | Rare | Weight increased *, weight decreased * |
* Frequency estimated from clinical trials for adverse events detected from spontaneous report (1) Few cases were exceptionally reported with fatal outcome or liver transplantation in patients with hepatic risk factors. 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
the national reporting system
listed in Appendix V.
Symptoms
There is limited experience with agomelatine overdose. Experience with agomelatine in overdose has indicated that epigastralgia, somnolence, fatigue, agitation, anxiety, tension, dizziness, cyanosis or malaise have been reported. One person having ingested 2450 mg agomelatine, recovered spontaneously without cardiovascular and biological abnormalities.
Management
No specific antidotes for agomelatine are known. Management of overdose should consist of treatment of clinical symptoms and routine monitoring. Medical follow-up in a specialised environment is recommended.
Pharmacotherapeutic group: Psychoanaleptics, other antidepressants, ATC-code: N06AX22 Mechanism of action Agomelatine is a melatonergic agonist (MT1 and MT2 receptors) and 5-HT2C antagonist. Binding studies indicate that agomelatine has no effect on monoamine uptake and no affinity for a, b adrenergic, histaminergic, cholinergic, dopaminergic and benzodiazepine receptors. Agomelatine resynchronises circadian rhythms in animal models of circadian rhythm disruption. Agomelatine increases noradrenaline and dopamine release specifically in the frontal cortex and has no influence on the extracellular levels of serotonin.
Pharmacodynamic effects
Agomelatine has shown an antidepressant-like effect in animal models of depression (learned helplessness test, despair test, chronic mild stress) as well as in models with circadian rhythm desynchronisation and in models related to stress and anxiety. In humans, Thymanax has positive phase shifting properties; it induces a phase advance of sleep, body temperature decline and melatonin onset. Clinical efficacy and safety The efficacy and safety of Thymanax in major depressive episodes have been studied in a clinical programme including 7,900 patients treated with Thymanax. Ten placebo controlled trials have been performed to investigate the short term efficacy of Thymanax in major depressive disorder in adults, with fixed dose and/or dose up-titration. At the end of treatment (over 6 or 8 weeks), significant efficacy of agomelatine 25-50 mg was demonstrated in 6 out of the ten short-term double-blind placebo-controlled trials. Primary endpoint was change in HAMD-17 score from baseline. Agomelatine failed to differentiate from placebo in two trials where the active control, paroxetine or fluoxetine, showed assay sensitivity. Agomelatine was not compared directly with paroxetine and fluoxetine as these comparators where added in order to ensure assay sensitivity of the trials. In two other trials, it was not possible to draw any conclusions because the active controls, paroxetine or fluoxetine, failed to differentiate from placebo. However, in these studies it was not allowed to increase the start dose of either agomelatine, paroxetine or fluoxetine even if the response was not adequate. Efficacy was also observed in more severely depressed patients (baseline HAM-D >= 25) in all positive placebo-controlled trials. Response rates were statistically significantly higher with Thymanax compared with placebo. Superiority (2 trials) or non-inferiority (4 trials) has been shown in six out of seven efficacy trials in heterogeneous populations of depressed adult patients versus SSRI/SNRI (sertraline, escitalopram, fluoxetine, venlafaxine or duloxetine) The anti-depressive effect was assessed with the HAMD-17 score either as primary or secondary endpoint. The maintenance of antidepressant efficacy was demonstrated in a relapse prevention trial. Patients responding to 8/10-weeks of acute treatment with open-label Thymanax 25-50 mg once daily were randomised to either Thymanax 25-50 mg once daily or placebo for further 6-months. Thymanax 25- 50 mg once daily demonstrated a statistically significant superiority compared to placebo (p=0.0001) on the primary outcome measure, the prevention of depressive relapse, as measured by time to relapse. The incidence of relapse during the 6-months double-blind follow up period was 22% and 47% for Thymanax and placebo, respectively. Thymanax does not alter daytime vigilance and memory in healthy volunteers. In depressed patients, treatment with Thymanax 25 mg increased slow wave sleep without modification of REM (Rapid Eye Movement) sleep amount or REM latency. Thymanax 25 mg also induced an advance of the time of sleep onset and of minimum heart rate. From the first week of treatment, onset of sleep and the quality of sleep were significantly improved without daytime clumsiness as assessed by patients. In a specific sexual dysfunction comparative trial with remitted depressed patients, there was a numerical trend (not statistically significant) towards less sexual emergent dysfunction than venlafaxine for Sex Effects Scale (SEXFX) drive arousal or orgasm scores on Thymanax. The pooled analysis of trials using the Arizona Sexual Experience Scale (ASEX) showed that Thymanax was not associated with sexual dysfunction. In healthy volunteers Thymanax preserved sexual function in comparison with paroxetine. Thymanax had neutral effect on heart rate and blood pressure in clinical trials. In a trial designed to assess discontinuation symptoms by the Discontinuation Emergent Signs and Symptoms (DESS) check-list in patients with remitted depression, Thymanax did not induce discontinuation syndrome after abrupt treatment cessation. Thymanax has no abuse potential as measured in healthy volunteer studies on a specific visual analogue scale or the Addiction Research Center Inventory (ARCI) 49 check-list. A placebo-controlled 8-week trial of agomelatine 25-50mg/day in elderly depressed patients (>= 65 years, N=222, of which 151 on agomelatine) demonstrated a statistically significant difference of 2.67 points on HAM-D total score, the primary outcome. Responder rate analysis favoured agomelatine. No improvement was observed in very elderly patients (>=75 years, N= 69, of which 48 on agomelatine). Tolerability of agomelatine in elderly patients was comparable to that seen in the younger adults.
Paediatric population
The European Medicines Agency has deferred the obligation to submit the results of studies with Thymanax in one or more subsets of the paediatric population in the treatment of major depressive episodes (see section 4.2 for information on paediatric use).
Absorption and bioavailability
Agomelatine is rapidly and well (>= 80%) absorbed after oral administration. Absolute bioavailability is low (< 5% at the therapeutic oral dose) and the interindividual variability is substantial. The bioavailability is increased in women compared to men. The bioavailability is increased by intake of oral contraceptives and reduced by smoking. The peak plasma concentration is reached within 1 to 2 hours. In the therapeutic dose-range, agomelatine systemic exposure increases proportionally with dose. At higher doses, a saturation of the first-pass effect occurs. Food intake (standard meal or high fat meal) does not modify the bioavailability or the absorption rate. The variability is increased with high fat food.
Distribution
Steady state volume of distribution is about 35 l and plasma protein binding is 95% irrespective of the concentration and is not modified with age and in patients with renal impairment but the free fraction is doubled in patients with hepatic impairment.
Biotransformation
Following oral administration, agomelatine is rapidly metabolised mainly via hepatic CYP1A2; CYP2C9 and CYP2C19 isoenzymes are also involved but with a low contribution. The major metabolites, hydroxylated and demethylated agomelatine, are not active and are rapidly conjugated and eliminated in the urine.
Elimination
Elimination is rapid, the mean plasma half-life is between 1 and 2 hours and the clearance is high (about 1,100 ml/min) and essentially metabolic. Excretion is mainly (80%) urinary and in the form of metabolites, whereas unchanged compound recovery in urine is negligible. Kinetics are not modified after repeated administration.
Renal impairment
No relevant modification of pharmacokinetic parameters in patients with severe renal impairment has been observed (n=8, single dose of 25 mg), but caution should be exercised in patients with severe or moderate renal impairment as only limited clinical data are available in these patients (see section 4.2).
Hepatic impairment
In a specific study involving cirrhotic patients with chronic mild (Child-Pugh type A) or moderate (Child-Pugh type B) liver impairment, exposure to agomelatine 25 mg was substantially increased (70- times and 140-times, respectively), compared to matched volunteers (age, weight and smoking habit) with no liver failure (see section 4.2, 4.3 and 4.4).
Older people
In a pharmacokinetic study in elderly patients (>= 65 years), it was showed that at a dose of 25 mg the mean AUC and mean Cmax were about 4-fold and 13-fold higher for patients >= 75 years old compared to patients < 75 years old. The total number of patients receiving 50 mg was too low to draw any conclusions. No dose adaptation is required in elderly patients.
Ethnic groups
There is no data on the influence of race on agomelatine pharmacokinetics.
In mice, rats and monkeys sedative effects were observed after single and repeated administration at high doses. In rodents, a marked induction of CYP2B and a moderate induction of CYP1A and CYP3A were seen from 125 mg/kg/day whereas in monkeys the induction was slight for CYP2B and CYP3A at 375 mg/kg/day. No hepatotoxicity was observed in rodents and monkeys in the repeat dose toxicity studies. Agomelatine passes into the placenta and foetuses of pregnant rats. Reproduction studies in the rat and the rabbit showed no effect of agomelatine on fertility, embryofoetal development and pre- and post natal development. A battery of in vitro and in vivo standard genotoxicity assays concludes to no mutagenic or clastogenic potential of agomelatine. In carcinogenicity studies agomelatine induced an increase in the incidence of liver tumours in the rat and the mouse, at a dose at least 110-fold higher than the therapeutic dose. Liver tumours are most likely related to enzyme induction specific to rodents. The frequency of benign mammary fibroadenomas observed in the rat was increased with high exposures (60-fold the exposure at the therapeutic dose) but remains in the range of that of controls. Safety pharmacology studies showed no effect of agomelatine on hERG (human Ether a-go-go Related Gene) current or on dog Purkinje cells action potential. Agomelatine did not show proconvulsive properties at ip doses up to 128 mg/kg in mice and rats. No effect of agomelatine on juvenile animals behavioural performances, visual and reproductive function were observed. There were mild non dose dependent decreases in body weight related to the pharmacological properties and some minor effects on male reproductive tract without any impairment on reproductive performances.
Tablet core:
Lactose monohydrate
Maize starch
Povidone K 30
Sodium starch glycolate type A
Stearic acid
Magnesium stearate
Silica, colloidal anhydrous
Film-coating: Hypromellose Yellow iron oxide (E172) Glycerol Macrogol 6000 Magnesium stearate Titanium dioxide (E171) Printing ink containing shellac, propylene glycol and indigotine (E132) aluminium lake.
Not applicable.
3 years.
This medicinal product does not require any special storage conditions.
Aluminium/PVC blister packed in cardboard boxes (calendar). Packs containing 7, 14, 28, 42, 56, 84 and 98 film-coated tablets. Packs of 100 film-coated tablets for hospital use. Not all pack sizes may be marketed.
No special requirements for disposal.
Servier (Ireland) Industries Ltd Gorey Road, Arklow, Co. Wicklow Ireland
EU/1/08/498/001-008
Date of first authorisation : 19 February 2009 Date of latest renewal:
Detailed information on this medicinal product is available on the website of the European Medicines Agency http://www.ema.europa.eu/.