Atanol

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Medically reviewed

Marina Burgos

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 Atanol

What is Atanol? (Trimetazidine)

Property Description
Active Ingredient Trimetazidine Hydrochloride
Form Oral Tablets (Modified-Release)
Pharmacological Class Metabolic Agent, Fatty Acid Oxidation Inhibitor
General Purpose Enhancing oxygen efficiency in heart cells
Origin Synthetic Compound

What is Atanol, and What is its Active Ingredient?

Atanol is a commercial brand name for a synthetic pharmaceutical preparation utilized in cardiovascular support, containing the single active ingredient, Trimetazidine Hydrochloride. This compound forms the basis of the medicine's therapeutic action. Atanol is typically supplied as an oral tablet, with the modified-release (MR) presentation being a common format, designed to ensure a consistent therapeutic effect via the oral route of administration. As a prescription-only (Rx) medication, its use is governed by a healthcare provider, targeting adult patient groups requiring specialized metabolic support.

What Type of Cardiovascular Drug is Atanol?

Atanol is classified as a metabolic agent and belongs to the pharmacological group of fatty acid oxidation inhibitors. It functions as a cytoprotective anti-ischemic agent, focusing its effect at the cellular level. This mechanism differentiates Atanol from traditional anti-anginal drugs, which often rely on affecting blood flow or heart rate. Trimetazidine is indicated for symptomatic treatment in cardiac contexts where oxygen supply is compromised.

What is the General Purpose of Atanol?

The general purpose of Atanol is to optimize the heart cell's ability to produce energy and enhance its oxygen efficiency. It achieves this by promoting a metabolic shift within the heart muscle, favoring the consumption of glucose over fatty acids. This process requires less oxygen consumption per unit of energy produced, representing a metabolic approach to managing heart tissue function. This effect is particularly relevant in scenarios where the heart requires improved efficiency to cope with increased demand or limited supply, helping to mitigate cellular stress and acidosis.

Regulatory References

  1. Trimetazidine referral

What side effects are possible with Atanol?

Possible Side Effects and Safety Information

The safety profile of Trimetazidine (Atanol) is officially classified by regulatory documents, which categorize adverse reactions primarily by frequency and the body system affected. These classifications are established by government health agencies to communicate the potential risk characteristics of the medicine.

Adverse Reactions by Frequency and System

Adverse reactions are documented across several System-Organ-Classes (SOCs). Effects classified as Common (affecting up to 1 in 10 patients) typically include neurological symptoms such as headache and dizziness, along with gastrointestinal effects like nausea, vomiting, and abdominal pain. Dermatological reactions like rash and pruritus are also considered common. Uncommon reactions may involve vascular issues such as orthostatic hypotension.

Serious Adverse Reactions and Safety Constraints

The most critical safety concern is the potential for the development of Parkinsonian symptoms (including tremor, bradykinesia, and gait instability), which are classified as a Not Known frequency event but are documented as serious. Regulatory labeling notes that these symptoms usually develop after a period of treatment, but are generally reversible upon discontinuing the medication. Furthermore, the medicine is contraindicated in individuals with pre-existing Parkinson's disease or related movement disorders, severe renal impairment (creatinine clearance less than 30 mL/min), and severe hepatic impairment. Caution is also specified for older adults (aged 75 years and above) due to a potentially increased exposure risk and higher susceptibility to certain effects.

Overdose and Emergency Response

An overdose of Atanol (a beta-blocker) can be a medical emergency, as it can severely affect the heart and circulatory system. Prompt medical intervention is critical in cases of suspected overdose.

Recognizing the Symptoms

Symptoms of an Atanol overdose may appear within minutes to hours after ingestion, depending on the dose and the specific formulation. Signs and symptoms can include:

  • Cardiovascular: Significantly slow heartbeat (bradycardia), severe low blood pressure (hypotension), dizziness, lightheadedness, or fainting. In severe cases, this can lead to shock and potentially heart failure.
  • Respiratory: Shortness of breath or wheezing, especially in individuals with pre-existing respiratory conditions like asthma.
  • Neurological: Confusion, excessive drowsiness, weakness, seizures, or loss of consciousness/coma. In children, low blood sugar (hypoglycemia) is a common and dangerous sign that can cause nervous system symptoms.

When to Seek Help

Immediate emergency medical attention is required if an overdose is suspected, even if the individual seems well, as effects can be delayed. Do not wait for severe symptoms to appear.

Call your local emergency number or Poison Control center immediately if you or someone else has taken more than the prescribed dose of Atanol. Be prepared to provide the name of the medicine, the amount swallowed, and the time it was ingested. Treatment often involves supportive care, monitoring of vital signs, and administering specific medications like Glucagon or High-Dose Insulin (HDI) therapy in a hospital setting to counteract the toxic effects.

Therapeutic Uses of Atanol

What Atanol Treats: Main Uses and Benefits

Atanol is commonly used across therapeutic domains where additional symptomatic support is needed for the long-term management of stable angina pectoris, a chronic condition marked by symptoms related to physical discomfort. Its primary role is generally as an add-on therapy when symptoms are inadequately controlled by or patients are intolerant to first-line antianginal therapies. The main therapeutic domains for which the medicine is used include addressing symptoms of stable angina, supporting recurrent vertigo episodes, and helping manage chronic tinnitus.

The medication is often used during phases when symptom clusters create noticeable physiological strain, particularly during periods of exertion. By addressing the symptoms that interfere with daily functioning, Atanol may contribute to functional stability and supports the patient during difficult episodes by easing distress.

“The symptomatic support offered helps patients cope more steadily with symptom fluctuations in daily routines.”

Quick Fact: Supportive management for Ischemia-Related Chest Discomfort

Eligibility and Restrictions for Use

The use of Atanol (Trimetazidine) is restricted by official regulatory labeling to specific populations and is strictly prohibited in others due to safety concerns defined in government documents.

Populations Who Must Not Use Atanol (Contraindications)

The medicine is absolutely contraindicated and must not be used in the following populations:

  • Hypersensitivity: Patients with a known allergy or hypersensitivity to Trimetazidine or any component of the formulation.
  • Movement Disorders: Individuals diagnosed with Parkinson’s disease, parkinsonian symptoms, tremors, or restless legs syndrome.
  • Severe Renal Impairment: Patients with severely reduced kidney function, defined as a creatinine clearance rate of less than 30 mL/min.

Restricted and Non-Recommended Use

Population Group Regulatory Status Restriction Basis
Pediatric Patients (< 18 yrs) Not recommended Safety and efficacy have not been established in this age group.
Moderate Renal Impairment Not recommended Caution is advised; use may require dose modification and careful assessment.
Pregnancy and Lactation Not recommended Precautionary measure due to insufficient or lack of data regarding safety in humans.
Older Adults (> 75 yrs) Use with caution Requires careful assessment, particularly concerning potential age-related decline in renal function.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for Atanol (Trimetazidine) is primarily defined by the absence of documented interactions with co-administered medicinal products. According to governmental prescribing information, no clinically significant drug-drug interactions have been identified, a conclusion which encompasses potential metabolic interactions mediated by cytochrome P450 (CYP) enzymes and pharmacodynamic effects. This official finding means that the regulatory label does not list any specific medicines or substance categories that are prohibited for co-administration due to interaction risk, nor does it require mandatory timing separation from other medicines.

Furthermore, the pharmacokinetic characteristics of Atanol are officially documented as being not influenced by foodstuffs. This ensures the stability of the medicine’s exposure profile regardless of meal consumption, and consequently, no food-based restrictions are required in the administration rules.

The primary constraint related to the medicine's profile concerns the patient's individual physiological state. Since Atanol is primarily eliminated via renal clearance, the official label documents that patients with moderate renal impairment (creatinine clearance 30-60 ml/min) and elderly patients (generally those over 75 years old) are expected to experience increased systemic exposure. This expected increase is a documented consequence of reduced clearance linked to these conditions, rather than an interaction with an external co-administered substance.

Mechanism of Action

Selective Modulation of Sympathetic Drive to the Heart

Atanol's mechanism of action involves functioning as a selective beta1-adrenergic receptor antagonist. It competitively blocks the binding of endogenous catecholamines, such as epinephrine and norepinephrine, at beta1-receptors predominantly located on cardiac tissue . This antagonistic action suppresses the sympathetic nervous system's stimulatory input to the heart, leading to a resulting decrease in the rate of the heart's electrical pacemaker activity and a corresponding diminished force of myocardial contraction.


Influence on the Renin-Angiotensin-Aldosterone System (RAAS)

In addition to its cardiac effects, Atanol engages beta1-receptors located in the juxtaglomerular apparatus of the kidneys. By antagonizing these renal receptors, the drug inhibits the release of renin, which is the initial enzyme in the Renin-Angiotensin-Aldosterone System (RAAS) cascade. This suppression of renin release influences the systemic pathway, leading to the reduction of downstream vasoconstrictive effects and decreased fluid retention, which impacts overall systemic vascular tone and volume.

Dosage and Administration Information

How to Use Atanol (Atenolol) — Administration Guidelines

This section outlines the administration instructions for Atanol (Atenolol) based on standard prescribing information.


Official Administration Scope

Atanol is available for two approved routes: Oral (tablet) and Intravenous (IV) (injection).

Usage Aspect Official Instruction
Standard Oral Dosing 50 mg once daily as the initial dose for hypertension or angina. The maintenance dose is typically 50 mg to 100 mg once daily.
Frequency and Timing Generally taken once daily. The tablet can be taken with or without food but should be taken consistently at the same time each day.
Preparation Tablets should be swallowed whole with water. Do not stop taking the drug abruptly.

Required Dose Adjustments

Dosage adjustments are mandatory for specific populations:

  • Geriatric Patients: May require a lower starting dose, such as 25 mg once daily.
  • Renal Impairment: Dosing must be adjusted based on creatinine clearance (CrCl). For CrCl < 15 mL/min, the maximum daily dose is 25 mg.

Procedural Instructions

  • Missed Dose: If a dose is missed, take it as soon as remembered; however, do not double the dose if it is near the next scheduled time. Skip the missed dose and resume the normal schedule.
  • Discontinuation: Therapy must not be stopped abruptly. The dosage should be gradually reduced over a period of about two weeks to avoid potential adverse effects.

These instructions define the standardized method for using the medicine, ensuring strict adherence to the regimen and necessary dose modifications.

Recent Clinical Evidence

Evidence for the Use in Stable Angina Pectoris

This section describes the structure of the clinical evaluation for Atanol’s use as an added treatment for stable angina. The research primarily utilizes Randomized Controlled Trials (RCTs) and subsequent meta-analyses, which examined adults with stable angina whose symptoms remained during standard first-line treatment. Research explored outcomes related to physical discomfort and daily functioning.

Specifically, studies examined outcomes related to the frequency of weekly angina episodes, documented nitrate use, and measured changes during controlled exercise capacity tests. The short-term findings describe patterns observed in these studies where the groups receiving the study treatment reported measurements that differed from those reported by the placebo groups. These patterns were generally found to be similar across short-term research.

Study Focus: Symptoms and Exercise Capacity

The core evidence comes from research exploring short-term symptom patterns under controlled conditions. Studies focused on patient-reported outcomes describing perceived discomfort and monitoring physiological strain during physical activity over defined time intervals (e.g., 2 to 12 weeks).

Research Context for Prior Uses: Vertigo and Tinnitus

Atanol was studied for symptomatic support in conditions like recurrent vertigo and chronic tinnitus. The research conducted in these areas was based on older controlled trials. Regulatory reviews found that these studies generally lacked strong methodological quality, and the evidence was considered insufficient to demonstrate a clear and consistent pattern of observed changes. Due to these limitations, these applications were deleted from the authorized uses by major regulatory bodies.

Long-Term Studies and Follow-Up Data

Some research monitored outcomes over longer periods, sometimes exceeding one year. Research examined systemic balance and the collection of data related to composite long-term cardiac outcomes. However, the available data for long-term outcomes remains limited, and findings from trials examining composite endpoints were mixed or inconsistent across the observed populations. Long-term effects are not fully established.

What is Still Uncertain About Atanol Research

Significant gaps remain, as noted in regulatory reviews. Long-term effects are not fully established, particularly concerning the medication's impact on composite outcomes over many years. Follow-up durations were limited in many core symptomatic efficacy trials. Comparative evidence is lacking for certain patient subgroups, and the certainty remains low regarding sustained functional benefits over a patient's lifetime. Research is ongoing.

Frequently Asked Questions (FAQ)

Common questions about Atanol (FAQ)

Q: How quickly do people usually start to notice the effect of Atanol?

The timeframe for observed effects can differ based on the active ingredient. According to regulatory studies, the full effect for Atenolol is generally seen within one to two weeks of consistent use. For Trimetazidine, the maximum concentration in the bloodstream is reached approximately five hours after taking the medicine, with stable concentrations typically reached after 60 hours of use.

Q: What is the general difference between Atanol and other medicines in the same class?

Atanol contains one of two primary active ingredients, Trimetazidine or Atenolol. Trimetazidine is categorized as a metabolic agent, whereas Atenolol is a beta1-selective beta-blocker. This selective action is a characteristic that is used to differentiate it from non-selective beta-blockers that affect receptors in other parts of the body, such as the lungs.

Q: Is it common to feel slightly dizzy when first starting Atanol?

Yes, dizziness is listed in official documents as a commonly reported side effect. For the active ingredient Atenolol, official patient guidance sometimes notes that the first dose may be taken at bedtime. This note is made to account for potential dizziness that may occur when starting the medicine.

Q: Can Atanol affect blood pressure readings?

The active ingredient Atenolol is specifically prescribed to lower blood pressure. Official regulatory information states that both active ingredients have been associated with changes in blood pressure, including the potential for orthostatic hypotension. Orthostatic hypotension is a reported uncommon side effect that refers to a drop in blood pressure that can occur when a person stands up.

Q: How does the official literature describe Atanol's potential for dependence?

Official patient information warns that therapy must not be stopped abruptly, and gradual dose reduction (tapering) is necessary. This instruction is necessary to avoid the worsening of the underlying condition or other potential adverse effects. Regulatory labels typically do not use the specific term 'dependence' in relation to this medicine.

Q: What is the difference between the various strengths of Atanol tablets?

Different tablet strengths are manufactured to allow healthcare providers to individualize the dose for each patient. The specific strength prescribed is based on the condition being treated, the patient's clinical response, and any mandated adjustments. For instance, dosage adjustments are required when a patient has reduced kidney function.

Q: Is Atanol available as a liquid or only as a tablet?

Official product documents state that the medicine is available primarily as an oral tablet. The active ingredient Atenolol is also documented as being available as an intravenous injection for use in a clinical setting. Regulatory information does not typically list a liquid formulation for oral use.

Q: How is the general understanding of Atanol's mechanism of action described to patients?

Regulatory patient information provides different descriptions based on the active ingredient. For Atenolol, the medicine is described as slowing the heart rate, which makes it easier for the heart to pump blood around the body. For Trimetazidine, the description is that it helps the heart cell improve its oxygen efficiency by shifting the way the cell produces energy.

Q: What do regulatory bodies say about the effectiveness of Atanol?

Regulatory bodies provide an indication (authorized use) for the medicine, such as the symptomatic treatment of stable angina pectoris. For the active ingredient Trimetazidine, official guidance recommends that the clinical benefit be assessed after three months, and the medicine may be considered for discontinuation if no treatment response is observed.

Q: Do studies suggest that Atanol works better for certain age groups?

Official guidance advises caution and potential dose modifications for older adults (over 75 years old) due to age-related changes in kidney function. Some research has raised questions regarding Atenolol's relative long-term protective effect for specific outcomes, such as stroke, in patients over 60 years old compared to other medications in the same class.

Q: Is Atanol the same kind of medicine as [similar generic drug]?

Atanol is a brand name. The active ingredient Trimetazidine is classified as a metabolic agent, while the active ingredient Atenolol is a generic beta-blocker. While regulatory information describes the drug's class and active ingredient, direct comparisons to specific competitor medicines are generally outside the scope of official product labels.

Q: Does Atanol cause weight gain or weight loss?

General weight gain or loss is not typically documented in official product information as a common side effect. However, regulatory labels for the active ingredient Atenolol list sudden weight gain as a symptom that may be associated with heart failure, which is a serious adverse reaction.

Q: Does Atanol affect energy levels or cause tiredness?

Yes, regulatory adverse event information lists fatigue (tiredness) as a commonly reported side effect for the active ingredient Atenolol. Furthermore, unusual weakness or fatigue is also a symptom listed that may be associated with the serious side effect of heart failure.

Q: Is there a generic version of Atanol available?

Atanol is a commercial brand name. The active ingredient Atenolol is widely available as a generic medication. The active ingredient Trimetazidine is also available under various brand names and may be supplied as a generic preparation, depending on the regulatory status in a specific country.

Q: What is the expected length of a typical Atanol treatment plan?

The length of a treatment plan is individualized based on the patient’s condition and response. For Trimetazidine, official guidance recommends that the clinical benefit be assessed after three months, and the medicine may be considered for discontinuation if no response is observed. Atenolol is often used as a long-term treatment for chronic conditions.

Q: Is Atanol considered a common prescription drug?

The active ingredient Atenolol is considered a commonly prescribed medication. Data cited in official contexts indicates that millions of prescriptions are dispensed annually in the United States.

Q: Are there any specific safety warnings for people who drive while taking Atanol?

Yes, official labeling includes warnings against driving or operating machinery until the individual is aware of how the medicine affects them. This precaution is advised because common side effects, such as dizziness and lightheadedness, may impact a person's ability to perform these tasks safely.

Q: What does it mean if Atanol is listed as a Schedule [X] drug?

Regulatory documents classify the active ingredients as Prescription-Only (Rx-only) medicines. This means they can only be dispensed under the direction of a healthcare provider. Neither Atenolol nor Trimetazidine are listed as Controlled Substances by the U.S. Drug Enforcement Administration.

Q: Are there any known interactions between Atanol and alcohol?

Official patient information for the active ingredient Atenolol includes warnings that alcohol can increase the medicine's blood pressure-lowering effect, potentially causing dizziness or lightheadedness. Additionally, reduced antiarrhythmic effects have been reported during periods of alcohol intoxication.

Q: What kind of monitoring is typically done while a person is taking Atanol?

Official documents note that regular monitoring of vital signs, including heart rate and blood pressure, is necessary for patients taking Atenolol. Monitoring of kidney function (renal function) is also a necessary assessment, particularly because dose adjustments are mandated for individuals with reduced kidney function.

Q: How long does Atanol stay in the body after the last use?

The time a medicine stays in the body is often measured by its half-life. For both Atenolol and Trimetazidine, the average half-life is documented as approximately seven hours for a person with normal kidney function. This time is reported to be significantly longer in older adults or individuals with reduced kidney function.

Q: What is the risk of overdose described in the official patient information for Atanol?

Official patient information describes potential overdose symptoms for beta-blockers like Atenolol. These symptoms may include severe bradycardia (slow heartbeat), hypotension (low blood pressure), heart failure, and shock. Official guidance emphasizes that medical attention should be sought immediately if an overdose is suspected.

Q: What research exists about Atanol's use in different ethnic populations?

Studies have been conducted to investigate differences in how Atenolol affects the body's metabolic profile across different ethnic populations. Research specifically noted differences in certain biochemical responses, such as changes in fatty acid levels, between African American and Caucasian patients receiving the medicine.

Q: Is Atanol known to cause dry mouth?

Dry mouth is not commonly listed in regulatory documents as a standalone adverse reaction for the active ingredients alone. However, it is reported as a potential side effect when the medicine is used in a combination product with other therapeutic agents, such as certain diuretics.

Q: Does Atanol affect sleep patterns?

Yes, the active ingredient Atenolol is associated with changes to sleep patterns. Vivid dreams or nightmares are listed in regulatory adverse event information as a reported side effect.

Q: Does Atanol have a warning label about mental health effects?

Yes, official adverse event information for Atenolol lists 'worsening mood' and 'feelings of depression' among the potential side effects. Confusion is also listed as a potential effect. These reports are included in the labeling for patients and healthcare providers.

Q: What are the signs of a severe allergic reaction to Atanol as officially described?

Official adverse event information describes signs of a serious allergic reaction, also known as hypersensitivity. These signs include skin rash, hives, itching, and swelling of the face, lips, tongue, or throat. If these symptoms are observed, official guidance advises that prompt medical attention should be sought.

How should Atanol be stored and disposed of?

Storage and Protection Requirements

Atanol (Trimetazidine modified-release tablets) must be stored in alignment with official regulatory conditions to ensure stability. The product should be kept at a temperature not exceeding 30 C; some labels specify storage below 25 C. The tablets must be protected from light and moisture and should be maintained in a tightly closed container within a dry and cool environment.

Shelf-Life and Child Safety

Do not use the medicine after the expiry date printed on the packaging. All medicine must be kept out of the reach and sight of children.

Disposal Instructions

Unused or expired Atanol should not be disposed of via waste water or household waste. Disposal must be carried out according to local requirements; consumers should consult their pharmacist for proper handling procedures to protect the environment.

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

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