Twincard is a fixed-dose combination antihypertensive medication containing Atenolol and Chlorthalidone. It is used for the treatment of hypertension (high blood pressure). Effective blood pressure control significantly reduces the risk of both fatal and non-fatal cardiovascular events, including stroke and myocardial infarction.

রেজিস্টার্ড চিকিৎসকের পরামর্শ অনুযায়ী ঔষধ সেবন করুন

Indications

• Treatment of hypertension

• Reduction of cardiovascular risks associated with elevated blood pressure, such as stroke and heart attack

Therapeutic Class

• Combined antihypertensive preparations

Pharmacology

Twincard combines two well-established antihypertensive agents that act through complementary mechanisms:

• Atenolol is a cardioselective beta₁-adrenergic receptor blocker. It reduces heart rate, cardiac output, and blood pressure by blocking sympathetic stimulation of the heart.

• Chlorthalidone is a long-acting thiazide-like diuretic. It promotes diuresis by increasing the excretion of sodium and chloride at the distal convoluted tubule of the nephron, leading to a reduction in plasma volume and blood pressure.

Clinical studies have demonstrated that Atenolol and Chlorthalidone do not interfere with each other’s bioavailability when administered together, making this combination a convenient and effective option for hypertension management.

Dosage and Administration

• Initial recommended dose: Atenolol 50 mg and Chlorthalidone 25 mg once daily

• If blood pressure is not adequately controlled, an additional antihypertensive agent may be added gradually, starting at 50% of the usual initial dose to avoid excessive hypotension

• Dose adjustment may be required in patients with severe renal impairment, as Atenolol is primarily excreted by the kidneys

• Use in elderly: Clinical data are limited in patients aged 65 years and above; careful monitoring is advised

Drug Interactions

• Concomitant use with digitalis glycosides may increase the risk of bradycardia due to additive effects on atrioventricular conduction and heart rate

Contraindications

Twincard is contraindicated in patients with:

• Hypersensitivity to Atenolol, Chlorthalidone, or sulfonamide-derived drugs

• Sinus bradycardia

• Heart block greater than first degree

• Cardiogenic shock

• Overt cardiac failure

• Anuria

Side Effects

The adverse effects of Twincard are consistent with those of its individual components.

Atenolol-related side effects may include:

• Bradycardia

• Cold extremities

• Postural hypotension

• Dizziness, vertigo, light-headedness

• Fatigue, lethargy, drowsiness

• Depression, sleep disturbances

• Gastrointestinal discomfort such as diarrhea and nausea

• Wheeziness or dyspnea

Chlorthalidone-related side effects may include:

• Orthostatic hypotension

• Anorexia, gastric irritation, vomiting

• Constipation, abdominal cramping

• Vertigo

• Skin reactions such as rash, urticaria, photosensitivity

• Metabolic changes including hyperglycemia, glycosuria, hyperuricemia

• Muscle spasm, weakness, restlessness

Pregnancy and Lactation

• Pregnancy Category D

• Use during pregnancy is not recommended unless clearly necessary

• Caution should be exercised when administering Twincard to breastfeeding women

  রেজিস্টার্ড চিকিৎসকের পরামর্শ অনুযায়ী ঔষধ সেবন করুন

Precautions and Warnings

• Twincard may worsen peripheral arterial circulatory disorders

• Regular monitoring of serum electrolytes is recommended to detect possible electrolyte imbalance

• Caution is advised in patients with renal impairment and in elderly patients

Overdose

There is no specific information on Twincard overdose in humans. Management is supportive and symptomatic and may include:

• Removal of unabsorbed drug by induced emesis or activated charcoal

• Hemodialysis to remove Atenolol from circulation

• Correction of hypotension, dehydration, and electrolyte imbalance using standard medical procedures

Storage Conditions

• Store in a cool and dry place

• Protect from light.