They’re often the first line of treatment for trouble getting or keeping an erection, called erectile dysfunction ED. 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. The four main medicines taken by mouth for erectile dysfunction are: Avanafil Stendra. Medicines that you take by mouth are called oral medicines. When oral medications might not be safe Check with your health care team before you take any medicine for erectile dysfunction.Treatments for erectile dysfunction are big business, and online scams abound. If you do buy medicines over the internet: Check to see if an online pharmacy is legitimate. Currently, there are no over the counter alternatives to Viagra available. Viagra (sildenafil) is a prescription medication, meaning it’s not available over the counter from your local. Viagra vs. over-the-counter products. Many over-the-counter (OTC) products may be advertised to help with ED. Examples of these products include: dehydroepiandrosterone .