How long before sex should i take Cialis

Cialis is a pill for treating erectile dysfunction. It takes about 30 minutes to kick in.

Although sildenafil (Viagra), vardenafil (Levitra), and tadalafil (Cialis) all work by inhibiting PDE5, tadalafil's pharmacologic distinction is its longer half-life (17.50 hours) - compared to Viagra (4.0 - 5.0 hours) and Levitra (4.0 - 5.0 hours) - resulting in longer duration of action, and so partly responsible for "The Weekend Pill" sobriquet.

Source: http://en.wikipedia.org/wiki/Tadalafil.