Erectile dysfunction medications require a prescription from a licensed provider. A phone or video consultation is sometimes required for legal purposes. Answer: No. Medical consultations were also taken into consideration, as PDE5 inhibitors require a valid prescription from a licensed medical provider. If you have an erection that lasts more than 4 hours, get medical help right away.The Savings Offer and Program expire on 12/31/ For further information, call , visit test1.ru, or write: Viatris Inc., P.O. Box , Mission, KS . Sildenafil (Viagra) is only approved by the FDA to treat erectile dysfunction in males. While some studies did look at the use of sildenafil (Viagra) in females, more research is . 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.