But you also deserve to do that safely. What Are the Symptoms of Erectile Dysfunction? Using the ED medicines we prescribe puts you at greater risk of severe reactions such as extreme dizziness, fainting, heart attack, and stroke. You deserve to put ED behind you and to enjoy your sex life. Make sure to get an estimate of when you can expect your prescription in the mail.Best Low Cost: GoodRx Fastest Delivery: Blink Health: Sesame Sign Up Now Key Specs Cost: Consultation prices vary based on the prescriber; $5 generic . Viagra vs Cialis? About 75 to 85 percent of the time both Viagra and Cialis are effective drugs for erectile dysfunction. Do not start, stop, or change the dosage of any . Viagra is only available with a doctor’s prescription. Keeping Viagra as a prescription-only medication is for the safety of the person using this medication. ED can be brought about due to other diseases, so having a thorough evaluation with a physician may help you get to the root of the problem. People See more.