Have you had any changes in sexual desire? Preparing for your appointment You’re likely to start by seeing your family doctor. If approved, the provider will issue a prescription. Tell your doctor if any of these symptoms are severe or do not go away: headache. Depending on your particular health concerns, you might go directly to a specialist — such as a doctor who specializes in male genital problems urologist or a doctor who specializes in the hormonal systems endocrinologist. Treatment can be more successful for you when you involve your partner.Your doctor can explain the risks and benefits of each treatment and will consider your preferences. Your partner’s preferences also might play a role in your treatment choices. . Avanafil (Stendra). Sildenafil (Viagra). Tadalafil (Cialis). Vardenafil. These medicines are called PDE5 inhibitors. They enhance the effects of a chemical the body makes that . 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 .