Forzest 20 mg is a medication used for the treatment of erectile dysfunction (ED). It contains the active ingredient Tadalafil, which is a phosphodiesterase type 5 (PDE5) inhibitor. Forzest 20 mg contains 20 milligrams of Tadalafil. Tadalafil, the active ingredient, helps increase blood flow to the penis during sexual stimulation, leading to the achievement and maintenance of an erection. It is effective in treating erectile dysfunction by inhibiting the action of PDE5, allowing the smooth muscles in the penis to relax.