Manforce is a medication commonly used to treat erectile dysfunction (ED) in men. It contains sildenafil citrate, the same active ingredient found in Viagra, which helps increase blood flow to the penis, allowing a man to achieve and maintain an erection when sexually stimulated. Manforce does not cause an erection without sexual arousal. Manforce is typically taken about 30 to 60 minutes before sexual activity, and its effects can last for up to 4 to 6 hours. It is intended for use on an as-needed basis rather than daily, and it should be used only once per day.