When I had major surgery three years ago, the button to give myself a dose of hydromorphone only worked every 10 minutes. I imagine systems like this are pretty

When I had major surgery three years ago, the button to give myself a dose of hydromorphone only worked every 10 minutes. I imagine systems like this are pretty common. When I left the hospital five days later, my prescription wasn't anything nearly so strong—and this was a surgery with a months-long recovery.