Tadact 20 mg is a medication that contains the active ingredient tadalafil, which belongs to a class of drugs known as phosphodiesterase type 5 (PDE5) inhibitors. It is primarily used to treat erectile dysfunction (ED) in men. Tadalafil, the active ingredient in Tadact 20 mg, works by increasing blood flow to the during stimulation, helping to achieve and maintain erections. It inhibits the action of the enzyme phosphodiesterase type 5 (PDE5), which is responsible for regulating blood flow. The recommended dosage of Tadact 20 mg may vary depending on individual response and tolerability. It is typically taken orally, with or without food, approximately 30 minutes before anticipated activity. The onset of action is usually within 30 minutes to 1 hour, and the effects may last for up to 36 hours.