You are encouraged to report adverse events related to Viatris products by calling U. Patients should always ask their doctors for medical advice about adverse events. If it is not treated right away, priapism can permanently damage your penis sudden vision loss in one or both eyes. Since alcohol decreases blood flow to the penis, it limits the drug’s effectiveness i. Stop taking VIAGRA and call your healthcare provider right away if you have any sudden vision loss sudden hearing decrease or hearing loss. But if someone takes Viagra with cocaine, they’re at risk for priapism, heart attack or stroke. The information provided is for educational purposes only and is not intended to replace discussions with a healthcare provider.Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s now sold by many manufacturers, including online. Many online companies claim to sell Viagra without a prescription, but this is illegal. What many of these sites actually sell is counterfeit Viagra. It is worth noting that these kinds of. Ordering Viagra Without a Doctor Visit. While many sites sell drugs online illegally, one company called KwikMed offers consumers the option of buying certain medications—the erectile.