Oxymorphone
"I've been on pain meds for 30  years. Changed to Opana ER 20 x 2. This made a large difference but still had breakthrough pain so DR added Opana IR 10mg. These I break up into thirds, halves, or quarters as needed.  I couldn't use Norco because of breathing problems. This dosage isn't perfect but I'm no longer whining every time I get in or out of the car. 2 major surgeries coming over the summer. I hope Opana continues to work."