The initial dosage of Doxazosin mesylate tablets in patients with hypertension and or BPH is mg given once daily in the. This unfavorable difference was also present when doxazosin was compared to the amlodipine and lisinopril treatment arms. If you have prolonged abnormal erection, call your doctor or go to an emergency doxazosin kopen room as soon as possible. Warnings Syncope and Effect: Doxazosin, like other alpha-adrenergic blocking agents, can cause marked hypotension, especially in the upright position, with syncope and other postural symptoms such as dizziness. With doxazosin and not significantly different statistically from that with placebo. In addition, each tablet contains the following inactive ingredients: anhydrous lactose, colloidal silicon dioxide, magnesium stearate, microcrystalline cellulose, sodium lauryl sulfate, and sodium starch glycolate. To avoid falling, take the first dose of doxazosin at bedtime.