Tadarise 20 mg Tablets include the active component Tadalafil, which is used to treat erectile dysfunction (ED) in males. Tadarise 20 should be taken precisely as directed by your doctor. Tadarise 20 should be taken orally with a full glass of water, with or without meals, as prescribed by your doctor. The pill should not be crushed or chewed. Tadarise 20 is usually taken one tablet each day, at least 30 minutes before sexual activity.