Write down any symptoms you’ve had, including any that might seem unrelated to erectile dysfunction. When taken at the correct time and paired with sexual stimulation, the erection lasts long enough for successful intercourse. Preparing for your appointment You’re likely to start by seeing your family doctor. How can I best manage other health conditions with my erectile dysfunction? It might work longer if you have mild to moderate erectile dysfunction. Oral medicine for ED also might not be safe or work well if you have: Very low blood pressure, called hypotension, or uncontrolled high blood pressure, called hypertension. Your partner might see your inability to have an erection as a sign of diminished sexual interest.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 drug that’s used in . Your doctor or other health care professional can recommend one for you based on these factors, other health conditions you have and any other medicines you . 1 day ago · While some countries sell Viagra over-the-counter, in the United States, Viagra and similar ED medications like sildenafil, Cialis, and tadalafil, require a prescription .