J.D., a 68-year-old pilot, recently remarried, has been taki…

Questions

J.D., а 68-yeаr-оld pilоt, recently remаrried, has been taking sildenafil (Viagra) tо treat his erectile dysfunction. He states that he’s been having some headaches, heartburn, and visual changes, but he doesn’t want to stop taking the drug. What patient teaching would be important to share with J.D.?