Take Etnol-100 mg tablet orally, usually once daily, with or without food. Swallow the tablet whole with water. Do not crush or chew it. Try to take it at the same time each day to maintain a consistent level of medication in your body.

Atenolol is a selective beta-1 adrenergic receptor blocking agent. It primarily acts on beta-1 receptors in the heart, reducing heart rate, cardiac output, and myocardial oxygen demand. It also reduces renin release from the kidneys, which contributes to its antihypertensive effect. Unlike non-selective beta-blockers, it has less effect on beta-2 receptors in the bronchi and peripheral blood vessels, making it generally safer for patients with respiratory conditions.

• •Known hypersensitivity to atenolol or any component of the tablet
• •Sinus bradycardia (slow heart rate)
• •Second or third degree atrioventricular (AV) block
• •Cardiogenic shock
• •Overt cardiac failure (decompensated heart failure)
• •Sick sinus syndrome
• •Untreated pheochromocytoma
• •Metabolic acidosis
• •Severe peripheral arterial circulatory disturbances

Store below 30°C in a dry place, away from light and moisture. Keep out of reach of children.

Symptoms of overdose may include severe bradycardia, hypotension, acute cardiac failure, bronchospasm, and hypoglycemia. Management includes gastric lavage, activated charcoal, and symptomatic and supportive treatment. Atropine, glucagon, IV fluids, vasopressors, and bronchodilators may be administered as needed.

Pregnancy Category D: Atenolol has been shown to cause fetal harm. It should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus. Lactation: Atenolol is excreted in human milk and may cause adverse effects in a breastfed infant (e.g., bradycardia, hypoglycemia). Use with caution in nursing mothers.