These medicines all work well for ED. Avanafil Stendra. 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. Medicines that you take by mouth are called oral medicines. Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you take. Some people may also have ringing in their ears tinnitus or dizziness. The four main medicines taken by mouth for erectile dysfunction are: Avanafil Stendra.Viagra vs. over-the-counter products. Many over-the-counter (OTC) products may be advertised to help with ED. Examples of these products include: . An OTC drug will help patients get treatment more quickly. Dr. Pearlman says it can often take months to get an appointment with a healthcare provider who can . 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 .