Tadalafil (Weekend Pill) is the chemical name of the active ingredient in Cialis. Cialis was originally patented and traded by Eli Lilly. It is FDA-approved to treat ED and urinary symptoms due to BPH.
Tadalafil Cialis used to Treat erectile dysfunction. It is similar to Viagra and Levitra. Under the brand name Adcirca, tadalafil is used for pulmonary arterial hypertension.