Some people may also have ringing in their ears tinnitus or dizziness. Don’t view occasional erection problems as a reflection on your health or masculinity, and don’t automatically expect to have erection trouble again during your next sexual encounter. Click here for an email preview. Children 1 year of age and older weighing 20 kg or less—10 mg 3 times a day. Have you had any changes in sexual desire?VIAGRA is available by prescription only in 25 mg, 50 mg, and mg tablets. Patients should always ask their doctors for medical advice about adverse events. You are . If you have erectile dysfunction (ED), your doctor may recommend that you take Viagra. It’s a prescription drug that’s used in adult males* with ED. With ED, you . 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 .