Papaverine (pa PAV er een) Phentolamine (fen TOLE a meen) Papaverine is a non-selective phosphodiesterase inhibitor that promotes smooth muscle relaxation. It may help address symptoms of erectile dysfunction. It may also be used for other conditions as determined by your doctor. Phentolamine is an alpha-1 blocker or nonselective alpha-adrenergic receptor blocker. It may help address symptoms of erectile dysfunction. It may also be used for other conditions as determined by your doctor.
