Men with erectile dysfunction (ED) can be treated with the oral pills Cenforce 100 mg. It has Sildenafil Citrate as an active component, which relaxes the smooth muscles in blood vessel walls and improves blood flow to the penis. It is a member of the group of drugs known as PDE5 inhibitors. It is advised to take one pill once every 24 hours. Taking it with or without meals is OK. It should be taken between 30 and 1 hour prior to the scheduled sexual activity, or as directed by the doctor. This medication's effects persist for around 4 to 5 hours.