These include itraconazole Sporanox, Tolsura , ketoconazole Extina, Ketozole, others and ritonavir Norvir. They’re often the first line of treatment for trouble getting or keeping an erection, called erectile dysfunction ED. If you experience chest pain, dizziness, or nausea during sex, seek immediate medical help. Alpha-blockers are sometimes prescribed for prostate problems or high blood pressure. Such patients must not apply any out-of-pocket expenses incurred using this Savings Offer toward any government insurance benefit out-of-pocket spending calculations, such as Medicare Part D true out-of-pocket TrOOP costs You are responsible for reporting use of this Savings Offer to any private insurer, health plan, or other third party who pays for or reimburses any part of the prescription filled using this Savings Offer, as may be required. Avanafil Stendra.Learn more about what VIAGRA® (sildenafil citrate), a prescription treatment for ED. Tell your healthcare provider about all the medicines you take, including prescription and . Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum . Oral medicines for ED usually work well and cause few side effects. The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil .