The body takes longer to absorb it after a high-fat meal or alcohol. Generic versions of sildenafil, vardenafil and tadalafil are available. These tablets amplify the effects of nitric oxide. Sexual stimulation releases this chemical and these medications enhance its effect, allowing for an erection. These medicines all work well for ED. EPO plans, deductibles, etc. However, as you get older, your risk can increase.Work with your doctor to manage diabetes, heart disease or other chronic health conditions. See your doctor for regular checkups and medical screening tests. Stop . Oral medicines for ED usually work well and cause few side effects. The four main medicines taken by mouth for erectile dysfunction are: Avanafil (Stendra). Sildenafil . AdGet Medical Advice Online or On the Phone from a Verified Doctor 1-on-1 Now or Anytime. Talk to a Verified Doctor about Your Symptoms in 1-on-1 Online Chat Right Now or Anytime.4/5 (34K reviews)Site visitors: Over K in the past month.