Data shared with Viatris will be aggregated and de-identified; it will be combined with data related to other Savings Offer redemptions and will not identify you Viatris reserves the right to rescind, revoke, or amend this Savings Offer without notice No membership fees. Devices and alternative treatments that can help with ED include pumps and implants, counseling efforts, and shock wave therapy. The body takes longer to absorb it after a high-fat meal or alcohol. They enhance the effects of a chemical the body makes that relaxes muscles in the penis, called nitric oxide. Other common side effects include headache, flushing, dyspepsia or bloating, abnormal vision, and stuffy nose or cold-like symptoms. Alcohol is a depressant that affects many systems in the body, including those involved in producing an erection. This does not mean that Viagra will work for 16 to 20 hours.Sildenafil (Viagra). This medicine works best when you take it on an empty stomach an hour before sex. The body takes longer to absorb it after a high-fat meal or alcohol. Its effects . Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in adult males* with . Viagra contains sildenafil citrate, an inhibitor of phosphodiesterase type 5 (PDE5). Viagra enhances the action of cyclic GMP, which is released in the penis in response to sexual .