Back to Results New Search

Prazosin

Drug Class: Cardiovascular Drugs
Dosage Form: Capsule
Strength: 1mg, 2mg, 5mg
Indications/Special comments: Hypertension, congestive heart failure, Raynaud's syndrome (but efficacy not established, benign prostatic hyperplasia.
Dosage Administration: Hypertension: By mouth: Adult: Initially, 500 micrograms 2 – 3 times a day for 3 – 7 days, the initial dose should be taken on retiring to bed at night to avoid collapse, increased to 1mg 2 – 3 times a day for a further 3 – 7 days, then increased if necessary up to 20mg daily in divided doses. Congestive heart failure (rarely used): By mouth: Adult: 500 micrograms 2 – 4 times a day, initial dose to be taken at bedtime, then increased to 4mg daily in divided doses; maintenance 4 –20mg daily in divided doses.Raynaud's syndrome (but efficacy not established): By mouth: Adult: Initially, 500 micrograms twice daily, initial dose to be taken at bedtime, dose may be increased after 3 – 7 days, and then increased if necessary to 1 – 2mg twice daily. Benign prostatic hyperplasia: By mouth: Adult: Initially, 500 micrograms twice daily for 3 – 7 days, subsequent doses should be adjusted according to response, maintenance 2mg twice daily, initiate with lowest possible dose in elderly patients.