The best candidates for an erectile dysfunction (ED) prescription are men who regularly have trouble getting or maintaining an erection that is firm enough for sexual activity. This includes those whose ED is caused by physical conditions like diabetes, high blood pressure, obesity, heart disease, or low testosterone. Men experiencing psychological factors such as stress, anxiety, or depression that affect their sexual performance may also benefit. Candidates should be in generally good health and not taking medications that could dangerously interact with ED drugs (such as nitrates for chest pain). A proper medical evaluation is important to determine the cause of ED and ensure that prescription medication is safe and appropriate for the individual. Men looking for a reliable, doctor-approved treatment—rather than over-the-counter or herbal remedies—are ideal candidates for a prescription.