Attachment: Product Information: Avanafil

PDE5 inhibitor drugs, such as sildenafil (Viagra), tadalafil (Cialis), and vardenafil (Levitra), are given orally to inhibit the enzyme PDE5 that inactivates cGMP. This allows more active cGMP to relax the smooth muscles of the arteries in the penis, increase blood flow, and create an erection. ................
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