Tadacip 20 mg 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. Tadacip 20 mg, like other PDE5 inhibitors, requires sexual stimulation to be effective. It does not cause spontaneous erections but enhances the body's natural response to sexual arousal.