Shipping: Discreet, fast shipping is a must. Still other online pharmacies specialize in medications for only a select few health concerns or conditions. Erectile dysfunction can be caused by a variety of factors , including age, cardiovascular problems, diabetes, and other conditions that affect nerve function or blood flow. Stendra avanafil : This is an as-needed medication taken 30 minutes before sex and can last up to six hours. It’s available in 25 mg, 50 mg, and mg tablets and lasts up to 18 hours. According to the FDA, generic medications contain the same active ingredients as brand names, meaning there’s no difference in effectiveness or safety. Contact your medical provider if you experience any side effects during treatment.While you’ve likely used a brick-and-mortar pharmacy to get your prescriptions, online pharmacies can be a convenient and efficient way to get the medications you need. . Buying ED Drugs Online: What’s the Risk? Medically Reviewed by Carol DerSarkissian, MD on January 18, Written by MD Editorial Contributors Risks of Online ED Drugs . 1 kace66 • 10 yr. ago • Edited 10 yr. ago There are some canadian pharms that my pt’s use for the same reason you are interested: the brandname meds can cost a whole lot: .