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ACEBUTOLOL - Mechanism of Action, Indications, uses, Administration, Side Effects

Chemical Formula:

  • C18H28N2O4

Mechanism of Action:

  • Acebutolol is a selective beta-1 adrenergic receptor antagonist, commonly referred to as a beta-blocker.

  • It works by blocking the effects of adrenaline (epinephrine) and noradrenaline (norepinephrine) on the beta-1 adrenergic receptors in the heart and other tissues.

  • By blocking these receptors, acebutolol reduces the effects of sympathetic stimulation on the heart, leading to a decrease in heart rate and contractility.

  • This results in decreased cardiac output and blood pressure, making it useful in the management of conditions such as hypertension (high blood pressure) and certain cardiac arrhythmias.

  • Acebutolol also possesses intrinsic sympathomimetic activity (ISA), which means it has partial agonist activity in addition to its antagonist effects.

  • This allows for a more controlled reduction in heart rate and blood pressure compared to non-selective beta-blockers.

Indications and Uses:

Acebutolol is primarily indicated for the management of:

  1. Hypertension: It is used to lower blood pressure in individuals with high blood pressure, helping to reduce the risk of cardiovascular complications.

  2. Cardiac Arrhythmias: Acebutolol is used to control certain types of irregular heart rhythms, such as supraventricular arrhythmias, including atrial fibrillation and atrial flutter.

It may also be prescribed off-label for other conditions, such as angina (chest pain) and migraine prophylaxis.


  • Acebutolol is available in the form of oral tablets.

  • The recommended dosage and treatment plan may vary depending on individual factors, including the condition being treated, severity of symptoms, and response to the medication.

  • The dosage is typically initiated at a low level and gradually increased over time as determined by a healthcare professional.

  • It is important to follow the prescribed dosage instructions and to not abruptly discontinue the medication without medical guidance.

Side Effects:

Common side effects associated with acebutolol may include:

  1. Fatigue or drowsiness

  2. Cold extremities (hands and feet)

  3. Gastrointestinal disturbances, such as nausea and diarrhea

  4. Bradycardia (slow heart rate)

  5. Hypotension (low blood pressure)

  6. Sexual dysfunction

  • Less common but more serious side effects can occur, including bronchospasm (narrowing of the airways) in individuals with asthma or chronic obstructive pulmonary disease (COPD), worsening heart failure, and masking of hypoglycemic symptoms in individuals with diabetes.

  • It is important to discuss any pre-existing medical conditions, medications, or concerns with a healthcare professional before starting acebutolol.

  • Regular monitoring of blood pressure, heart rate, and other relevant parameters may be necessary during treatment.


  • Acebutolol is a selective beta-1 adrenergic receptor antagonist used in the management of hypertension and certain cardiac arrhythmias.

  • By blocking the effects of sympathetic stimulation on the heart, it reduces heart rate and blood pressure. Acebutolol is typically well-tolerated, but common side effects such as fatigue and gastrointestinal disturbances may occur.

  • It is important to follow the prescribed dosage instructions and consult a healthcare professional for personalized information and guidance regarding the use of acebutolol.


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