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Avaforce 50 mg works by inhibiting the PDE5 enzyme, which is responsible for breaking down a molecule called cyclic guanosine monophosphate (cGMP). During sexual arousal, increased levels of cGMP lead to relaxation of the blood vessels in the penis, allowing for increased blood flow and resulting in an erection. By preventing the breakdown of cGMP, Avaforce helps maintain an erection long enough for satisfactory sexual performance.