Verapamil and propranolol in essential hypertension

Area of Science:

• Cardiology
• Pharmacology

Background:

• Essential hypertension is a prevalent cardiovascular condition requiring effective management.
• Verapamil and propranolol are established antihypertensive agents with distinct mechanisms of action.

Purpose of the Study:

• To compare the antihypertensive efficacy and side effect profiles of verapamil and propranolol.
• To evaluate the relationship between drug dosage, plasma levels, and clinical response.

Main Methods:

• A 9-week, randomized, double-blind, parallel study involving 24 subjects with mild to moderate essential hypertension.
• Administration of verapamil (240-480 mg%) and propranolol (120-360 mg%) with regular monitoring of blood pressure, heart rate, and plasma drug levels.

Main Results:

• Verapamil significantly reduced systolic and diastolic blood pressure across all postural positions (average 20/16 mm Hg).
• Propranolol also reduced blood pressure (average 9/11 mm Hg), but less effectively than verapamil, particularly for sitting systolic pressure.
• Verapamil prolonged the PR interval and did not affect heart rate, while propranolol decreased heart rate.

Conclusions:

• Verapamil is an effective antihypertensive agent for mild to moderate essential hypertension.
• Common side effects of verapamil included constipation, pedal edema, and rash.