Viagra is commonly prescribed for men who experience difficulties in achieving and maintaining an erection. It works by increasing blood flow to the penis, which helps to facilitate an erection during sexual stimulation.
Mechanism of Action: Viagra belongs to a class of medications called phosphodiesterase type 5 (PDE5) inhibitors. It inhibits the enzyme PDE5, which is responsible for the degradation of a substance called cyclic guanosine monophosphate (cGMP). By inhibiting PDE5, Viagra helps to enhance the effects of cGMP, leading to increased blood flow to the penis.
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