Trizedon MR

Trimetazidine diHCl.

Pharmacotherapeutic group: Other cardiac preparations. ATC code: C01EB15.
Pharmacology: Pharmacodynamics: Mechanism of action: By preserving energy metabolism in cells exposed to hypoxia or ischaemia, trimetazidine prevents a decrease in intracellular ATP levels, thereby ensuring the proper functioning of ionic pumps and transmembrane sodium-potassium flow whilst maintaining cellular homeostasis.
Trimetazidine inhibits β-oxidation of fatty acids by blocking long-chain 3-ketoacyl-CoA thiolase, which enhances glucose oxidation. In an ischaemic cell, energy obtained during glucose oxidation requires less oxygen consumption than in the β-oxidation process. Potentiation of glucose oxidation optimizes cellular energy processes, thereby maintaining proper energy metabolism during ischaemia.
Pharmacodynamic effects: In patients with ischaemic heart disease, trimetazidine acts as a metabolic agent, preserving the myocardial high-energy phosphate intracellular levels. Anti-ischemic effects are achieved without concomitant haemodynamic effects.
Clinical efficacy and safety: Clinical studies on trimetazidine have demonstrated its efficacy and safety in the treatment of patients with chronic angina, either alone or when the benefit from other antianginal medicinal products was insufficient.
In a 426-patients randomized, double blind, placebo-controlled study (TRIMPOL-II), trimetazidine (60mg/day) added to metoprolol 100mg daily (50 mg b.i.d) for 12 weeks significantly improved statistically exercise tests parameters and clinical symptoms as compared to placebo: total exercise duration +20.1s, p= 0.023, total workload +0.54 METs, p=0.001, time to 1-mm ST-segment depression +33.4s, p=0.003, time to onset of angina +33.9s, p<0.001, angina attacks/week -0.73, p=0.014 and short acting nitrates consumption/week, -0.63, p=0.032, without hemodynamic changes.
In a 223 patients randomized, double blind, placebo-controlled study (Sellier), one 35 mg trimetazidine modified release tablet (b.i.d.) added to 50 mg atenolol (o.d.) for 8 weeks produced a significant increase (+34.4s, p=0.03) in the time to 1-mm ST-segment depression in exercise tests, in a sub-group of patients (n=173), when compared to placebo, 12 hours after taking the drug. A significant difference was also evidenced for the time to onset of angina pectoris (p=0.049). No significant difference between groups could be found for the other secondary endpoints (total exercise duration, total workload and clinical endpoints).
Pharmacokinetics: After oral administration, maximum concentration is found, on average, 5 hours after taking the tablet. Over 24 hours the plasma concentration remains at levels above or equal to 75% of the maximum concentration for 11 hours.
Steady state is reached by the 60^th hour, at the latest.
The pharmacokinetic characteristics of Trizedon MR are not influenced by meals.
The apparent distribution volume is 4.8 l/kg; protein binding is low: in vitro measurements give value of 16%.
Trimetazidine is eliminated primarily in the urine, mainly in the unchanged form.
The elimination half-life of Trizedon MR is an average of 7 hours in healthy young volunteers and 12 hours in subjects aged more than 65 years. Total clearance of trimetazidine is the result of major renal clearance which is directly correlated to creatinine clearance and, to a lesser extent, to liver clearance which is reduced with age.
Special populations: Elderly subjects: A specific clinical study carried out in an elderly population using a dosage of 2 tablets per day taken in 2 doses, analysed by a population pharmacokinetics approach, showed an increase in plasma exposure.
The elderly may have increased trimetazidine exposure due to age-related decrease in renal function.
A dedicated pharmacokinetic study performed in elderly 75-84 years or very elderly (≥ 85 years) participants showed that moderate renal impairment (creatinine clearance between 30 and 60 ml/min) increased respectively by 1.0 and 1.3 fold the trimetazidine exposure in comparison to younger participants (30-65 years) with moderate renal impairment.
Renal impairment: Trimetazidine exposure is increased on average by 1.7 in patients with moderate renal impairment (creatinine clearance between 30 and 60 ml/min) and on average by 3.1 fold in patients with severe renal impairment (creatinine clearance below 30 ml/min) as compared to healthy young volunteers, with normal renal function. No safety concerns were observed in this population as compared with the general population.
Paediatric population: The pharmacokinetics of trimetazidine has not been studied in the paediatric population (<18 years).
Toxicology: Preclinical safety data: Chronic oral toxicity studies in dogs and rats showed a good safety profile.
Genotoxic potential was assessed in in vitro studies, including evaluation of the mutagenic and clastogenic potential, and in one in vivo study. All the tests were negative.
Reproductive toxicity studies performed in mice, rabbits and rats showed no embryotoxicity or teratogenicity. In rats, fertility was not impaired and no effects on postnatal development were observed.

Adjunctive to established antiangina. Should not be used as monotherapy.

Oral route: The dose is one tablet of 35mg of trimetazidine twice daily during meals.
The benefit of the treatment should be assessed after three months and trimetazidine should be discontinued if there is no treatment response.
Special populations: Patients with renal impairment: In patients with moderate renal impairment (creatinine clearance [30-60] ml/min) (see Precautions and Pharmacology: Pharmacokinetics under Actions), the recommended dose is 1 tablet of 35mg in the morning during breakfast.
Elderly patients: Elderly patients may have increased trimetazidine exposure due to age-related decrease in renal function (see Pharmacology: Pharmacokinetics under Actions). In patients with moderate renal impairment (creatinine clearance [30-60] ml/min), the recommended dose is 1 tablet of 35mg in the morning during breakfast.
Dose titration in elderly patients should be exercised with caution (see Precautions).
Paediatric population: The safety and efficacy of trimetazidine in children aged below 18 years have not been established. No data are available.

The information available concerning trimetazidine overdose is limited. Treatment should be symptomatic.

Hypersensitivity to the active substance or to any of the excipients.
Parkinson disease, parkinsonian symptoms, tremors, restless leg syndrome, and other related movement disorders.
Severe renal impairment (creatinine clearance < 30 ml/min).
Use of this drug in nursing mothers is generally inadvisable.

This drug is not a curative treatment for angina attacks, nor is it indicated as an initial treatment for unstable angina, nor myocardial infarction, nor in the pre-hospital phase or during the first days of hospitalisation.
In the event of an angina attack, the coronary heart disease should be reevaluated and an adaptation of the treatment considered (medicinal treatment and possibly revascularisation).
Trimetazidine can cause or worsen Parkinsonian symptoms (tremor, akinesia, hypertonia), which should be regularly investigated, especially in elderly patients. In doubtful cases, patients should be referred to a neurologist for appropriate investigations.
The occurrence of movement disorders such as parkinsonian symptoms, restless leg syndrome, tremors, gait instability should lead to definitive withdrawal of trimetazidine.
These cases have low incidence and are usually reversible after treatment discontinuation. The majority of the patients recovered within 4 months after trimetazidine withdrawal. If parkinsonian symptoms persist more than 4 months after drug discontinuation, a neurologist opinion should be sought.
Falls may occur, related to gait instability or hypotension, in particular in patients taking antihypertensive treatment (see Adverse Reactions).
Caution should be exercised when prescribing trimetazidine to patients in whom an increased exposure is expected: Moderate renal impairment (see Pharmacology: Pharmacokinetics under Actions and Dosage & Administration); Elderly patients older than 75 years old (see Dosage & Administration).
In patients with severe hepatic failure, in the absence of specific studies, prescription of TRIZEDON MR 35 mg is not recommended.
This medicinal product is generally not recommended during breastfeeding (see Use in Pregnancy & Lactation).
Effects on ability to drive and use machines: Not applicable.

Pregnancy: There are no data from the use of trimetazidine in pregnant women.
Animal studies do not indicate direct or indirect harmful effects with respect to reproductive toxicity (see Pharmacology: Toxicology: Preclinical safety data under Actions). As a precautionary measure, it is preferable to avoid the use of TRIZEDON MR 35 mg during pregnancy.
Breast-feeding: It is unknown whether trimetazidine/metabolites are excreted in human milk. A risk to the newborns/infants cannot be excluded. TRIZEDON MR 35 mg should not be used during breast-feeding.
Fertility: Reproductive toxicity studies have shown no effect on fertility in female and male rats (see Pharmacology: Toxicology: Preclinical safety data under Actions).

Concerning the adverse reactions associated with the use of trimetazidine, also see Precautions.
The table as follows includes the adverse reactions from spontaneous notifications and scientific literature. 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): (See table.)


Click on icon to see table/diagram/image

No drug interaction has been reported.

Store below 30°C.
Shelf life: 3 years.

Anti-Anginal Drugs

C01EB15 - trimetazidine ; Belongs to the class of other cardiac preparations.

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