 Unused prescription opioid pain medicines can spell trouble. Safely dispose of opioids before they can hurt your family. Find a drug take-back option such as medicine drop boxes. Visit www.fda.gov slash drug disposal. Not pain relief appliances. One appliance relieves pain for your back, and the other appliance relieves pain for your joints, such as knees, shoulders, and elbows. For back pain relief, you just lay in bed and put the appliance under your back.