Cenforce 25 mg contains sildenafil citrate, which works by inhibiting the enzyme phosphodiesterase type 5 (PDE5). By blocking PDE5, sildenafil helps to increase the levels of cyclic guanosine monophosphate (cGMP), a chemical that relaxes smooth muscles in the blood vessels of the penis. This relaxation allows for increased blood flow into the penis during sexual stimulation, leading to an erection.
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