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. It changes depending on the dose. They have the same benefits and risks as their brand-name counterparts. We also looked at additional services, such as access to digital pharmacies and home delivery options. It might work longer if you have mild to moderate erectile dysfunction. Answer: Sildenafil is the generic name for Viagra. You can take it in a small dose daily or in a larger dose as needed.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 . Check to see if an online pharmacy is legitimate. Never order medicines from an online pharmacy that doesn’t list its phone number and physical address, has prices . Best Low Cost: GoodRx Fastest Delivery: Blink Health: Sesame Sign Up Now Key Specs Cost: Consultation prices vary based on the prescriber; $5 generic .