About Cialis

Cialis is an oral drug for male impotence, also known as erectile dysfunction (ED). It works by dilating blood vessels in the penis, allowing the inflow of blood needed for an erection.

Cialis causes erections only during sexual excitement. It does not work in the absence of arousal and does not increase sexual desire.

In December 2003, the Food and Drug Administration approved Cialis for sale in the United States as the third ED prescription drug pill (after sildenafil (Viagra) and vardenafil (Levitra)). Cialis 48-hour effectiveness earned it the nickname, "The Weekend Pill"; like sildenafil and vardenafil, tadalafil is recommended as an 'as needed' medication. Cialis is the only one of the three that is also offered as a once-daily medication.

Moreover, Cialis was approved in May 2009 in the United States for the treatment of pulmonary arterial hypertension and is currently under regulatory review in other regions for this condition.