If you have an erection that lasts more than 4 hours, get medical help right away. Headache is the most common, and stuffy nose and facial flushing are quite common too. More harmful side effects tend to be uncommon or rare. Patients should always ask their doctors for medical advice about adverse events. Next review due on August 01, View all prices. Buy Viagra Online. Bye ED. For ED, Viagra is the first port of call. It’s been used by millions of men for over 20 years, and works by boosting circulation to the penis. . Get erectile dysfunction pills & meds such as Viagra and Cialis online after a consultation with our online medical professionals. Lemonaid makes it safe and . 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 .