A new survey finds more than half of U.S. doctors are reducing the number of opioid prescriptions they write. Almost 10 percent have stopped prescribing opioids altogether, The Boston Globe reports.

More than one-third of doctors surveyed said reducing opioid prescribing has hurt patients with chronic pain. The survey was conducted for the newspaper by the SERMO physicians social network, an online community that allows doctors to anonymously share ideas and concerns.

Doctors said the two main reasons they have cut back were the risks and hassles involved in prescribing opioids, and a better understanding of the painkillers’ risks.