Initial dose ¼ tab bid on the 1st day then ≥½ tab bid for the next 2 days. Usual dose: 1 tab bid w/ 7-hr interval.
Should be taken on an empty stomach.
Hypersensitivity. Nitrates, PDE-5 inhibitors (ie, sildenafil, tadalafil, vardenafil). Angle-closure glaucoma, head trauma or cerebral hemorrhage, severe anemia.
Vol depletion, hypotension, right ventricular infarctions; ethanol; tolerance & cross-tolerance to nitrates. Antianginal & dynamic effect may occur during prolonged therapy. Postural-hypotension, weakness, dizziness or syncope may occur.