Cenforce is a generic version of Viagra, and its active ingredient is Sildenafil Citrate. Sildenafil Citrate is a phosphodiesterase type 5 (PDE5) inhibitor, which is commonly used to treat erectile dysfunction. Cenforce is available in various dosages, such as 25 mg, 50 mg, 100 mg, 150 mg, and 200 mg. The most common dosage is 100 mg, but the appropriate dosage may vary depending on individual circumstances and the severity of ED.