Cenforce is a medication used to treat Erectile Dysfunction. It contains the active ingredient sildenafil citrate, which is also found in the well-known drug Viagra. In the USA, Cenforce is available both as a prescription and as an over-the-counter medication. This medication is taken by mouth as a tablet. Its effects can last up to 4 hours, and it usually starts to work within 30 minutes. Cenforce Pill can cause some serious side effects, including an erection that lasts for more than four hours and a sudden decrease or loss of hearing.