Rogue pharmacies are not licensed to sell in the United States and put you at risk of counterfeit or tainted drugs How Many Online Pharmacies Are There? The most common symptoms of erectile dysfunction include difficulty achieving or maintaining an erection and reduced sexual desire. Most online pharmacies do not prescribe or refill controlled substances, like Adderall, Xanax, or oxycodone. When taken at the correct time and paired with sexual stimulation, the erection lasts long enough for successful intercourse. For more information, work with a member of our medical team who can order lab tests to look for any critical underlying problems. The body takes longer to absorb it after a high-fat meal or alcohol. Common side effects include headache, facial flushing, indigestion, and dizziness.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 .  · 67% average discount Based on the average user savings between January and September Search for your prescription on our site or mobile app to see how much you can save. How GoodRx Works Compare prices Drug prices vary by pharmacy. Use GoodRx to find current prices and discounts. Get free couponsMissing: levitra. You should consult your health care professional before taking any drug, changing your diet, or commencing or discontinuing any course of treatment. Vardenafil is used to treat Missing: mail order.