Cialis  is a prescription medication for the treatment of erectile dysfunction. The active ingredient in Cialis is Tadalafil. Cialis represents a new class of medications known as PDE-5 inhibitors. These medications are used to treat impotence. Cialis has been shown to improve erectile function in most men with ED, including those with mild, moderate or severe ED.

Physicians are referring to Cialis as the "weekender" secondary to their patients taking one dose for an entire "weekend" of impotence treatment.

Tadalafil is the generic name for Cialis. The generic name represents the medications nonproprietary or chemical name, whereas, the brand name is the name a pharmaceutical give to a medication for marketing purposes.

As Cialis enhances the actions of the chemical messengers responsible for producing an erection, it will only work once these messengers are present. This means that sexual stimulation is required for it to produce and maintain an erection.

The dose should be taken at least 30 minutes before intended intercourse, and it may produce an erection in response to sexual stimulation for up to 36 hours after taking the dose.

Cialis is the only oral prescription medicine for ED clinically proven to both work up to 36 hours and work in some men as fast as 30 minutes. Cialis has been used by millions of men worldwide.