Children 1 year of age and older weighing 20 to 45 kg—20 mg 3 times a day. Is my erectile dysfunction most likely temporary or chronic? Alternatively, the medicine may be taken 30 minutes to 4 hours before sexual intercourse. Request an appointment There is a problem with information submitted for this request. Be prepared for questions such as these: What other health concerns or chronic conditions do you have?For ED treatment, PlushCare physicians can prescribe brand-name or generic Viagra, Cialis, Levitra, and Stendra. The prescription is electronically sent to the pharmacy of . endocrinologist mental health professional How to find a urologist Your primary care physician can refer you to a specialist qualified to treat ED. Some other ways you can . 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 prescription .