网页Tadalafil - STADA T20 - 20 Milligram. Tadalafil, sold under the brand name Cialis among others, is a medication used to treat erectile dysfunction, benign prostatic hyperplasia, and pulmonary arterial hypertension. [5] [6] [8] It is taken by mouth. [8]Onset is typically within half an hour and the duration is up to 36 hours. [8]Common side effects include headache, muscle pain, flushed skin ...