Generic Cialis Soft Tabs is an oral drug used to treat male impotence also referred to as erectile dysfunction (ED). Generic Cialis Soft Tabs have the same active ingredient as brand name Cialis, and are equivalent in effect, strength, and dosage. The Soft Tabs versions of the bestselling Generic Cialis absorb into your bloodstream quickly without losing their potency. They can be taken as little as 15 minutes before intercourse and last up to 36 hours.