Those with pre-existing conditions should always consult a healthcare provider before taking new medications or supplements. Most online providers require a picture of a valid ID, a selfie showing your face, and a recent blood pressure reading taken with a home blood pressure monitor or by a medical provider. Its effects might last longer if you have mild to moderate ED. Shipping: Discreet, fast shipping is a must. This increase in blood flow results in a firmer, longer-lasting erection. There are many safe, reliable online services offering ED prescriptions.Generic Viagra (sildenafil) is an alternative to the branded Viagra drug that can be used for treating erectile dysfunction (ED). It’s now sold by many manufacturers, including online. 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 . If you’re interested in buying Viagra online, five of the best options available are Hims, Roman, Lemonaid, Optum Store, and REX MD. Read on for full details on the process .