Nearly a third of those surveyed said they received an opioid prescription in the past two years, usually for arthritis, back pain, surgery or injury. About half of those had leftover medication.

While most were cautious about their use of opioids, what they did with the leftover meds was cause for concern. The vast majority (86%) said they kept it in case they had pain again. Only 9% threw their opioids in the trash or flushed it down the toilet, and 13% returned it to an approved location.

"The fact that so many older adults report having leftover opioid pills is a big problem, given the risk of abuse and addiction with these medications," said Alison Bryant, PhD, senior vice president of research for AARP. "Having unused opioids in the house, often stored in unlocked medicine cabinets, is a big risk to other family members as well.”

The researchers suspect that many older adults fear that they will not be able to obtain pain medication when needed because of laws and guidelines that discourage opioid prescribing. Several states now mandate that initial opioid prescriptions for acute pain be limited to a few days’ supply.