Tadacip is a medication primarily used to treat erectile dysfunction (ED) in men. It contains tadalafil as its active ingredient, which works by relaxing the muscles and increasing blood flow to the penis during sexual arousal, making it easier to achieve and maintain an erection. Tadacip belongs to the class of drugs called phosphodiesterase type 5 (PDE5) inhibitors, which also includes other medications like Viagra (sildenafil) and Cialis (tadalafil).