The prescription pills, sold under the brand name Journavx and made by Vertex Pharmaceuticals, are taken twice a day and represent the first new class of pain medications in 20 years—and the first non-opioid painkiller since that class first appeared on the market in the 1980s.

The U.S. Food and Drug Administration said it approved Vertex Pharmaceuticals’ Journavx for short-term pain that often follows surgery or injuries.

Despite high demand for an option like Journavx, doctors fear the drug’s price could be a major hangup for insurers, potentially limiting patients’ ability to access it.