GLP-1 drugs may possess a new power: Easing migraines. In a small, preliminary study, a GLP-1 drug nearly halved the number of days people spent with a migraine in a given month.
The results, presented June 21 at the European Academy of Neurology Congress in Helsinki, Finland, expand the possible benefits of the powerful new class of obesity and diabetes drugs. These pernicious, debilitating headaches are estimated to affect one billion people worldwide.
Earlier studies have shown that GLP-1 agonists can reduce the pressure inside the skull, a squeeze that’s been implicated in migraines. Neurologist Simone Braca of the University of Naples Federico II in Italy and his colleagues explored whether liraglutide, an older relative of Ozempic and Wegovy, might help migraine sufferers. Thirty-one adults, 26 of them women, got daily injections of liraglutide for 12 weeks. These adults all had obesity and continued to take their current migraine medicines too.
At the start of the experiment, participants had headaches on about 20 days out of a month. After 12 weeks of liraglutide, the average number dropped to about 11 days. “Basically, we observed that patients saw their days with headache halved, which is huge,” Braca says. Participants’ weight stayed about the same during the trial, suggesting that headache reductions weren’t tied to weight loss.
If the results hold up in larger studies, they may point to treatments for migraine sufferers who aren’t helped by existing drugs. The results may also lead to a deeper understanding of the role of pressure inside the head in migraines, Braca says.
The trial, described in Headache June 17, was an early look at the effects of liraglutide on migraines; it didn’t include a comparison group, and participants and researchers all knew that everyone received liraglutide. Larger trials that include comparison groups, and perhaps people without obesity, will clarify the drug’s effect on headaches.
A new class of migraine drugs, called CGRP blockers, has been incredibly effective for many people, but they don’t help everyone, Braca says. “What I would like to say to these patients is that research is going forward.”