The drug sildenafil is used to treat erectile dysfunction in men (also called impotence). Phosphodiesterase 5 (PDE5) inhibitors, of which sildenafil is a member, are a class of medications. Phosphodiesterase type-5 is prevented from operating too quickly by these medications. The penis is one location where this enzyme functions. The penis does not harden and expand when a man is sexually aroused or struggles to sustain an erection, which is a sign of erectile dysfunction. An erection occurs when a man's body responds to sexual stimuli by boosting blood flow to his penis. The price for Cenforce 150 is also available in our pharmacy.