Effectiveness of nitrendipine, 20 mg once daily in the management of hypertension in general practice.

The effectiveness of nitrendipine, given as a single 20 mg tablet in the morning, was evaluated in general practice in 6,058 hypertensive patients. They filled in a questionnaire on their activities and previous antihypertensive treatment, if any. Visits were planned after 2, 6, and 12 weeks.