Box , Mission, KS If your pharmacy does not participate, you may be able to submit a request for a rebate in connection with this Savings Offer. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. If you often forget doses, it may help to set an alarm to remind you. What Are the Symptoms of Erectile Dysfunction? Follow-up support: Make sure you can get the help you need if questions or concerns arise after ordering. Finally, we checked customer reviews to better understand user experiences with each platform. The usual dose is 50mg, when you need it.Getting a 3-month supply. You may be able to get a day supply of Viagra. If approved by your insurance company, getting a day supply of the drug could reduce your number of trips to the. Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. 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 hypertension (PAH; high blood pressure in the vessels carrying blood to the . Typical dosing for Sildenafil (Viagra) The typical dose is to take 50 mg of sildenafil (Viagra) by mouth, about 1 hour before sex, as needed. The maximum recommended dose is mg. Don’t take sildenafil (Viagra) more than once daily (at any dose). Written by Brian Leonard, PharmD, BCACP, BCGP.