Some online pharmacies even offer non-prescription drugs at a discount. So, if you’re looking to transition your prescription purchases from a storefront location, we’ve .The body takes longer to absorb it after a high-fat meal or alcohol. Often, these are prescribed for chest pain called angina. Independent online pharmacies operate solely on the Internet, either domestically or internationally. You can take this medicine with or without food 30 minutes before sex, depending on the dose. When choosing one, tell your doctor or other health care professional what your preferences are, such as cost, ease of use, how long the drug’s effects last and side effects. Side effects Side effects of oral ED medicines are often mild. Online pharmacies can be broadly categorized as: Mail-order pharmacies are operated by pharmacy benefits managers PBMs on behalf of health insurers or providers.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 alcohol. Its effects . While many sites sell drugs online illegally, one company called KwikMed offers consumers the option of buying certain medications—the erectile dysfunction drugs . Some online pharmacies even offer non-prescription drugs at a discount. So, if you’re looking to transition your prescription purchases from a storefront location, we’ve .Most online pharmacies do not prescribe or refill controlled substances, like Adderall, Xanax, or oxycodone. It might work longer if you have mild to moderate erectile dysfunction. Sildenafil Viagra. Oral medicine for ED also might not be safe or work well if you have: Very low blood pressure, called hypotension, or uncontrolled high blood pressure, called hypertension. Vardenafil usually works for 4 to 5 hours.