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 approved a new non-opioid pain medication developed by the Massachusetts-based company Vertex Pharmaceuticals on Thursday. The drug, which is called suzetrigine and will be sold under the brand name Journavx, is the first new type of pain medicine approved by the agency in more than 20 years.

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.