Trizedon

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Medically reviewed

Laura Arias

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 Trizedon

What is Trizedon: Identity and Origin of the Medicine

Trizedon is a pharmaceutical preparation used for supportive cardiac care, classified as an antianginal drug. Its core is the active ingredient, Trimetazidine, present as Trimetazidine dihydrochloride. This active substance is a synthetic chemical entity and is not derived from natural sources. The medicine is intended for oral administration and is typically presented as modified release film-coated tablets or prolonged-release capsules. This single active substance formulation, designed for prolonged release, ensures the consistent and steady systemic delivery of Trimetazidine.

What Type of Drug is Trimetazidine?

Trimetazidine is classified pharmacologically as a metabolic agent or cytoprotective agent, which distinguishes it within its broader category of antianginal drugs. Its classification designates it as an "Other cardiovascular antianginal drug." This means its primary action differs fundamentally from β-blockers or calcium channel blockers, which focus on altering heart dynamics. Pharmacological research indicates that Trimetazidine acts as an anti-ischemic agent, demonstrating its ability to reduce the detrimental cellular effects of insufficient blood flow to the heart muscle.

General Purpose and Cardioprotective Benefit

The general purpose of Trizedon is to provide cardioprotection by assisting the heart muscle in utilizing energy more efficiently, particularly when the muscle is stressed from insufficient oxygen supply, a common issue in stable angina pectoris. As a metabolic agent, it facilitates a metabolic shift within the cell. This action is recognized for preserving energy metabolism in cells exposed to ischaemia. Due to this unique action, the drug is used as an adjunctive therapy, supporting the patient alongside other primary heart medications.

What side effects are possible with Trizedon?

Possible side effects and safety information

The safety profile for Trimetazidine dihydrochloride is classified based on system-organ classes and frequency categories as documented in official regulatory sources, such as the European Medicines Agency (EMA) Summary of Product Characteristics (SmPC).


Officially Documented Adverse Reactions by Frequency

The frequency of adverse effects is classified according to standard regulatory conventions (Common: 1/100 to < 1/10; Rare: 1/10,000 to < 1/1,000; Not known: cannot be estimated from available data).

Reactions classified as Common include Dizziness, Headache, Abdominal pain, Diarrhoea, Nausea, Vomiting, Rash, Pruritus, Urticaria, and Asthenia (weakness). These effects primarily involve the Nervous system, Gastrointestinal disorders, and Skin and subcutaneous tissue.

Reactions classified as Rare include Palpitations, Extrasystoles, Tachycardia, Arterial Hypotension, and Orthostatic hypotension, affecting the Cardiac and Vascular systems.

Reactions with frequency Not known include serious reports such as Parkinsonian symptoms (tremor, hypertonia, gait instability), Hepatitis, Agranulocytosis, Thrombocytopenia, Angioedema, and Acute generalized exanthematus pustulosis (AGEP).


Safety Constraints and Special Populations

The medicine is Contraindicated in individuals with a known hypersensitivity, pre-existing Parkinson’s disease or related movement disorders, and severe renal impairment (creatinine clearance < 30 mL/min). The drug can cause or worsen parkinsonian symptoms, which are usually reversible upon discontinuation. This reversibility pattern is explicitly noted in regulatory documents.

Caution is advised for elderly patients and those with moderate renal impairment due to expected increased systemic exposure. Use is not recommended in the paediatric population and is avoided during pregnancy and breast-feeding.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documents provide very limited information regarding the specific clinical signs or symptoms that occur following an acute overdose of Trimetazidine dihydrochloride. No distinct syndrome or set of clinical manifestations is formally documented in the official prescribing information.

Emergency Action Mandate

In the event of taking more than the prescribed amount of this medicine, immediate medical attention must be sought. It is required to contact emergency medical services or a poison control center immediately. This instruction stands even if the person does not exhibit noticeable effects, as the regulatory framework mandates professional evaluation for all suspected overdose scenarios.

Management and Treatment Protocol

The official regulatory guidance dictates that the management of a Trimetazidine overdose should be symptomatic and supportive. This means that healthcare professionals will focus on treating any clinical signs or symptoms that may appear.

It is formally documented that no specific antidote is known or available for Trimetazidine overdose. The treatment protocol therefore relies entirely on supportive clinical care and continuous observation as determined by a medical professional. The regulatory labeling does not provide specific dose levels associated with toxicity, nor does it specify unique overdose risks for populations such as the elderly or those with impaired organ function.

Therapeutic Uses of Trizedon

What Trizedon Treats: Main Uses and Benefits

Trimetazidine, the active substance in Trizedon, is commonly used for the symptomatic management of chronic stable angina pectoris. The medication is considered relevant for easing symptomatic discomfort in adults who are either inadequately controlled by, or intolerant to, first-line antianginal therapies.


Symptomatic Relief and Functional Support

Trizedon is applied across conditions where stable heart function is affected by reduced blood flow, particularly in adult patients, including those with co-existing conditions like diabetes mellitus or left ventricular dysfunction. The medicine plays a role in managing symptoms that create noticeable physiological strain, such as recurrent chest pain, pressure, and the resultant limitations in physical activity.

“This supportive therapy is applied in clinical settings where patients require additional assistance to maintain stability against the recurring, disruptive symptoms of angina.”

By offering symptomatic relief, the medication may assist with maintaining functional stability and supports general well-being during physical exertion. This may help with reducing the consumption of short-acting nitrates (rescue medication) and supports general well-being during symptomatic phases.


Quick Fact: Use in Angina Symptom Management

Trizedon is generally used as add-on therapy when primary heart medications provide inadequate control of the frequency and intensity of angina symptoms.

Eligibility and Restrictions for Use

Eligibility for Trizedon (Trimetazidine)

Trizedon is officially approved for use only in adults as add-on therapy for stable angina pectoris, specifically when first-line antianginal treatments are inadequate or not tolerated. Regulatory documentation defines several absolute contraindications and restrictions based on physiological status and age.


Absolute Contraindications

Use is strictly prohibited in patients with:

  • Parkinson disease, parkinsonian symptoms, tremors, restless leg syndrome, and other related movement disorders.
  • Severe renal impairment, defined as a creatinine clearance of less than 30 mL/min.
  • Known hypersensitivity to Trimetazidine dihydrochloride or any of the excipients.

Restrictions and Special Populations

Use is not recommended in children and adolescents under 18 years because safety and efficacy have not been established in this age group. For pregnant women, use should be avoided as a precautionary measure due to a lack of human data, and it is not recommended for women who are breastfeeding. Furthermore, patients with moderate renal impairment (CrCl 30 to 60 mL/min) and those over 75 years old require regulatory caution due to the risk of increased drug exposure.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory documentation for Trimetazidine (the active substance in Trizedon) primarily indicates that no clinically significant drug interactions have been identified from clinical studies and post-marketing experience for the vast majority of commonly co-administered medicines.

Interaction Constraints and Considerations

The regulatory profile highlights a specific precaution concerning a particular class of medicines where interaction risk has not been definitively excluded:

  • Monoamine Oxidase Inhibitors (MAOIs): Regulatory guidelines suggest that, because non-interaction with MAOIs has not been formally established in clinical trials, co-administration of Trimetazidine with these agents is not recommended and should generally be avoided.

Pharmacodynamic Interactions

Official labeling includes a safety consideration regarding the co-administration of Trimetazidine with certain drugs that may increase the risk of specific adverse events:

  • Antihypertensive treatment: Caution is advised when Trimetazidine is co-administered with medicines used to lower blood pressure. The combination may increase the risk of falls, particularly those related to hypotension or gait instability, requiring practitioners to consider the patient's overall risk profile.

Pharmacokinetic Interactions

No specific medicinal products or drug classes are listed in current official documentation as significantly altering the exposure (concentration) of Trimetazidine, nor is Trimetazidine documented to significantly alter the exposure of other medicines through common metabolic pathways like CYP enzymes or transporters.

Mechanism of Action

Optimization of Myocardial Substrate Utilization

Trizedon functions as a selective inhibitor of the enzyme mitochondrial long-chain 3-ketoacyl CoA thiolase (3-KAT), an enzyme necessary for the catabolism of fatty acids within heart muscle cells. By blocking this final step of beta-oxidation, the drug redirects the heart's metabolism toward glucose oxidation. This pathway requires less oxygen per mole of ATP generated, modulating the heart's substrate utilization.


Alteration of Cellular Homeostasis

This metabolic shift is associated with an alteration in cellular homeostasis. By promoting glucose utilization, the mechanism facilitates the maintenance of stable ATP levels and limits the accumulation of metabolic byproducts that can compromise cell function. The mechanism is correlated with the maintenance of heart cell membrane integrity and the appropriate function of its ion pumps. This maintenance of cellular stability is a physiological consequence of the specific pathway modulation.

Dosage and Administration Information

Administration and Dosing Regimens

The usage of Trizedon is defined by specific requirements that govern the route, frequency, and dose adjustments. The medication is intended solely for oral administration and is typically supplied as either a 35 mg modified-release (MR) tablet or a 20 mg immediate-release (IR) tablet.

Standard Administration Patterns

The standard adult dosing for the modified-release formulation is 35 mg taken twice daily (one tablet in the morning and one in the evening). Alternatively, the conventional immediate-release form is taken at a dose of 20 mg three times daily. For proper intake conditions, Trizedon must be taken during meals. It is an explicit administration requirement that the MR tablets be swallowed whole and must not be crushed, broken, or chewed, as this would compromise their specific prolonged-release characteristics.


Dose Adjustments and Treatment Duration

Certain patient populations require dose modifications. For adults with moderate renal impairment (creatinine clearance of 30-60 mL/min), the total daily dose is reduced to one-half the standard amount; this typically translates to 35 mg once daily. Use is not recommended in the pediatric population (under 18 years) as efficacy and safety have not been established in this group. Treatment adherence and benefit must be assessed after three months of use, and discontinuation of the therapy is required if the patient does not demonstrate an adequate response to the regimen.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Trizedon


Evidence for Symptomatic Management in Chronic Stable Angina

This section will summarize the available evidence, primarily from short-term Randomized Controlled Trials (RCTs) and meta-analyses, that was studied for symptoms and functional capacity when used as an add-on therapy.

Research has focused on individuals with stable angina pectoris, a condition characterized by fluctuating or episodic manifestations of chest pain and discomfort. Studies explored how symptoms change over time when Trimetazidine was added to a patient’s existing heart medication, typically comparing the outcome to a placebo. These short-term trials monitored how the use of Trimetazidine was associated with changes in outcomes related to physical discomfort and outcomes reflecting daily functioning or activity level. Findings describe patterns observed in the studies that included reported measurements of weekly angina attack frequencies.

How Studies Measured Symptom Change and Functional Capacity

To measure changes in daily functioning, trials utilized exercise stress tests. Research examined how long individuals could exercise before showing objective signs of reduced blood flow to the heart (ischemia). Studies reported how symptoms evolved in the observed populations, indicating patterns observed in the studies related to measurements of total exercise duration and time until measurable signs of ischemia was monitored. These outcomes related to physiological strain or stress were also monitored by assessing changes in clinical status classifications, such as the Canadian Cardiovascular Society (CCS) functional class.


Evidence for Cardiac Functional Parameters

This section will describe the research, including certain RCTs and systematic reviews, that investigated measurements of objective heart pump efficiency and cardiac chamber volumes in patients with ischemic heart disease.

Trimetazidine was studied for key measures of heart function, such as the Left Ventricular Ejection Fraction (LVEF), which was monitored as a measure of heart function. Studies monitored how LVEF evolved during the study period, with some findings indicating a measured change in this functional parameter compared to control groups over medium-term observation periods. Findings for these cardiac functional endpoints were reported in some studies that often relied on modest sample sizes and had follow-up durations of approximately 3 to 6 months.


What Research Still Identifies as Uncertain

Research has explored longer-term outcomes related to Trimetazidine use. The data concerning outcomes related to short-term symptom patterns comes from short-term RCTs, meaning that long-term outcomes are not fully established. Specifically, the largest available long-term trials have not provided consistent evidence regarding an association between the use of the medicine and a reduction in hard endpoints like cardiac mortality or Major Adverse Cardiac Events (MACE) is not consistently documented. The overall evidence contributes to the broader evidence landscape but requires more robust and extended research to clarify outcomes in long-term critical scenarios.

Frequently Asked Questions (FAQ)

Common questions about Trizedon (FAQ)


Q: How long does the effect of a single dose of Trizedon typically last?

A: Official documents describe the pharmacokinetics of the active substance, Trimetazidine. The average elimination half-life, which is the time required for the drug concentration in the body to decrease by half, is typically between 6 to 12 hours. This half-life measurement helps determine the time intervals between doses required to maintain consistent levels of the drug in the body.

Q: Is there a generic version of Trizedon available?

A: The active ingredient in Trizedon is Trimetazidine dihydrochloride, which is the non-proprietary or generic name for the medicine. Trimetazidine is marketed internationally under various brand names, such as Vastarel or Preductal. The availability of specific generic products may vary by country and region.

Q: Are there specific foods or drinks that should be avoided while taking Trizedon?

A: Regulatory guidance states that the medicine must be taken during meals. Official labeling does not list specific common food-drug interactions that must be strictly avoided. However, some sources suggest caution regarding certain mineral-rich salts (like sodium, calcium, or magnesium) as a general precaution.

Q: Are there any major drug warnings listed on the Trizedon official label?

A: The official regulatory profile includes specific major safety restrictions known as Contraindications. These include strict prohibitions on use for patients with pre-existing Parkinson's disease or related movement disorders, as well as individuals with severe renal impairment (severe kidney problems). These restrictions represent absolute contraindications as defined by the official regulatory documents.

Q: Does the efficacy of Trizedon change over time?

A: Official regulatory information requires that the clinical benefit of the treatment be formally assessed after three months of use. If a patient does not demonstrate an adequate response to the regimen within that time, discontinuation of the therapy is required. This periodic assessment is a regulatory requirement to confirm that the treatment regimen remains appropriate.

Q: How does Trizedon affect the central nervous system?

A: The official safety profile notes common effects on the nervous system, including dizziness and headache. Furthermore, the medicine can cause or worsen specific Parkinsonian symptoms (such as tremor or gait instability), which are usually reversible if the drug is discontinued. The label also lists specific sleep disorders (insomnia or drowsiness) as possible adverse effects.

Q: Does Trizedon have a warning about driving or operating machinery?

A: Yes. Due to the known risks of experiencing dizziness and drowsiness, official safety warnings indicate that a patient's ability to drive or use machinery may be affected. The warning requires patients to consider these potential effects before engaging in activities that require full mental alertness.

Q: Does Trizedon interact negatively with alcohol?

A: Official labeling does not explicitly list alcohol as a direct drug interaction that must be avoided. However, because Trizedon is associated with central nervous system side effects like drowsiness, regulatory information advises caution when it is taken alongside any other substances that affect the CNS.

Q: Can I take Trizedon if I have a history of liver problems?

A: A history of liver problems is not listed as an absolute contraindication in official documents. However, the adverse reaction profile does include Hepatitis (liver inflammation) as a reported side effect, though the frequency is described as 'Not known.' This suggests it may be a point for clinical consideration.

Q: What happens if I miss a dose of Trizedon?

A: According to the official patient information leaflet, if a dose is missed, regulatory information requires that a patient not take a double dose to make up for the missed one. The recommended procedure is to continue with the next scheduled dose as planned.

Q: Is Trizedon a controlled substance or addictive?

A: Trizedon is not typically classified as a controlled substance associated with recreational drug abuse. However, the active substance, Trimetazidine, is listed on the World Anti-Doping Agency (WADA) Prohibited List. Additionally, the drug is designated as a 'Controlled Drug' in some countries, which reflects strict regulatory oversight requirements for dispensing.

Q: Does Trizedon show up on drug tests?

A: The active substance, Trimetazidine, is recognized and prohibited by the World Anti-Doping Agency (WADA) due to its performance-enhancing potential. Anti-doping sources indicate that the drug is detectable in urine for several days following administration. This requires specialized testing in the context of competitive sports and doping control.

Q: Has Trizedon been recently approved or is it an older drug?

A: Trizedon's active ingredient, Trimetazidine, is considered an older drug, with initial international approval dating back to January 1968. More recently, in 2012, its approved uses and indications were reviewed and restricted by the European Medicines Agency (EMA) to focus primarily on stable angina.

Q: What is the purpose of the black box warning (if any) on Trizedon?

A: Official regulatory documents from major agencies (e.g., EMA, UK) do not currently cite a U.S.-style 'Black Box Warning' (BBW). However, the product label contains a very strong safety alert noting that the medicine can cause or worsen Parkinsonian symptoms (such as tremor or gait instability). This is considered one of the highest safety concerns noted in the official labeling.

Q: Can Trizedon affect mood or sleep patterns?

A: Official safety information does list the possibility of effects on sleep patterns. Specifically, Sleep disorders (which include insomnia and drowsiness) are listed as adverse effects in the regulatory documentation, though the frequency is currently 'Not known.' The regulatory documents do not list specific adverse effects related to mood changes.

Q: What are the official recommendations if I want to stop taking Trizedon?

A: Regulatory guidance requires that stopping the medication be done only after discussing the decision with a prescribing healthcare provider. Official sources also note that discontinuation is explicitly required if a patient develops movement disorders, such as Parkinsonian symptoms, while taking the drug.

Q: Are there any official reports of Trizedon misuse potential?

A: The drug is not typically associated with substance abuse in a recreational context. However, official reports from sports authorities indicate a different type of misuse: the World Anti-Doping Agency (WADA) has banned the drug due to its potential use as a performance-enhancing substance that may improve physical efficiency.

How should Trizedon be stored and disposed of?

How to Store and Dispose of Trizedon?

Regulatory documentation defines the specific conditions necessary to maintain the integrity of Trizedon (trimetazidine dihydrochloride) and ensure environmental safety upon disposal.


Storage Conditions

Detail Requirement as per Official Labeling
Temperature Does not require any special temperature storage conditions.
Protection Keep in a dry place away from light and heat.
Safety Must be stored out of the reach and sight of children.
Stability Do not use past the expiry date printed on the packaging.

Disposal Instructions

Medicines should not be disposed of via wastewater or household waste. Disposal must be carried out in accordance with local requirements. Patients must be advised to ask their pharmacist how to dispose of medicines no longer required to protect the environment.

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

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