Vidalista 20 is a medication used to treat erectile dysfunction (ED) in men. It contains tadalafil as its active ingredient, which is a phosphodiesterase type 5 (PDE5) inhibitor. The onset of action for Vidalista 20 is similar to other tadalafil medications, typically taking effect within 30 minutes to 2 hours after ingestion. The effects of the medication can last for up to 36 hours, providing a longer window of time during which men may experience improved erectile function.