Tadacip 20 is a generic medication that contains tadalafil as its active ingredient. Tadalafil is a phosphodiesterase type 5 (PDE5) inhibitor used primarily to treat erectile dysfunction (ED) in men. This leads to relaxation of smooth muscles in the blood vessels of the penis and increased blood flow, which helps to achieve and maintain an erection. Tadacip 20 typically starts to work within 30 minutes to 1 hour after ingestion. Its effects can last up to 36 hours, which allows for a longer window of opportunity for sexual activity compared to other erectile dysfunction medications.