Cenforce 50 mg is marketed as containing sildenafil citrate, a PDE5 inhibitor used to treat erectile dysfunction (ED) in adult men. Sildenafil works by increasing blood flow to the penis during sexual stimulation, helping achieve and maintain an erection. This may help some men feel more confident about sexual activity when ED has affected their self-esteem. For most patients, 50 mg is the recommended starting dose when sildenafil is prescribed for ED. It is generally taken as needed approximately one hour before sexual activity, although it may be taken 30 minutes to four hours beforehand.