That’s not to say there aren’t just as many illegitimate sites. Some platforms have a digital pharmacy that ships the medication to your home, while others send an electronic prescription to your local pharmacy. These are commonly prescribed for an enlarged prostate or male pattern baldness. All PDE5 inhibitors, including Viagra and Cialis, require a valid prescription regardless of the pharmacy or provider. Other conditions that may disqualify you from an ED prescription include a history of stroke, kidney or liver disease, cancer, diabetes, or a bleeding disorder. Oral ED medicines might not work or might be dangerous if you also take any of the following: Nitrate medicines.Viagra Coupons, Prices, and Savings Card Generic Names: Sildenafil Citrate Brand Names: Revatio Sildenafil is used to treat male sexual function problems (impotence or erectile . CHOOSE BRAND-NAME VIAGRA. The original little blue pill prescribed by doctors for over 20 years. Clinically proven to treat men with erectile dysfunction (ED) Ongoing . 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 .