Children younger than 1 year of age—Use and dose must be determined by your doctor. How should this medicine be used? It is used for the treatment of erectile dysfunction. Remove the cap by pushing it down and twisting it counter-clockwise. Your doctor may adjust your dose as needed and tolerated.Refill and transfer prescriptions online or find a CVS Pharmacy near you. Shop online, see ExtraCare deals, find MinuteClinic locations and more.  · Sildenafil is used to treat erectile dysfunction and pulmonary arterial hypertension. Includes sildenafil side effects, interactions and indications. Get drug information Search for a drug by name or NDC number and get complete drug information. It’s like the printout attached to your refill—only electronic. Help me find my .