Some medications should not be taken with sildenafil. Our futuristic methods offer a new and updated approach to achieving optimum health and wellness, through our online digital health platform, also known as telemedicine. Continue to take sildenafil even if you feel well. Sildenafil is only available by prescription, so you must talk with a medical provider first. Most people start to feel the effects of Sildenafil within minutes after taking it. What should I do if I forget a dose? Nu Image Medical may not offer the medications or services mentioned in this article.Cost Overdose Ask your doctor Q&A Drug Images What is Viagra? If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a . Sildenafil (Liqrev, Revatio) is used to improve the ability to exercise in adults (Liqrev, Revatio) and children 1 year of age and older (Revatio) with pulmonary arterial . On this page Highlights for sildenafil Sildenafil oral tablet is available as a brand-name drug and as a generic drug. Brand names: Viagra, Revatio. Sildenafil .