An over-the-counter pill, Male Power Plus, that is used to treat impotence, is being recalled because it may contain the unlabeled prescription drug ingredient tadalafil, which can cause dangerous side effects in people taking nitrates to treat such diseases as diabetes, heart disease and hypertension.
Tadalafil, also known as Cialis, was approved by the FDA to treat erectile dysfunction, but they recommended it not be taken by people who have recently had a heart attack or stroke. Taking Cialis at the same time as nitrates may lower blood pressure and cause fainting or even death.