Generic versions of sildenafil, vardenafil and tadalafil are available. The body takes longer to absorb it after a high-fat meal or alcohol. Your doctor will prescribe whatever he deems is best for you. These are commonly prescribed for an enlarged prostate or male pattern baldness. You can take it in a small dose daily or in a larger dose as needed. This medication is taken with or without food an hour before sex. Find out whether Viagra is covered under the prescription coverage component of your insurance plan.Get your Viagra prescription. After discussing your erectile dysfunction and your medical history, ask your doctor for a prescription for Viagra. You may have your doctor’s office . If you’re looking for a less costly Viagra, you might want to ask your doctor about sildenafil. It’s the active ingredient in both branded Viagra and the drug Revatio, which is a lower . You can take the drug 30 minutes to 4 hours before you anticipate sexual activity. Based on how well you respond to this dosage and any side effects you have, your .