It’s not known to. Weight loss wasn’t reported in clinical studies of Ubrelvy.
Weight loss isn’t a known side effect of any drugs used to treat migraine. But weight loss can be a side effect of some drugs used to prevent migraine attacks, such as Topamax (topiramate). Also, some people temporarily lose their appetite during or after a migraine. So, having frequent migraines could lead to weight loss over time.
If you’re concerned about the effect of migraine or migraine treatment on your weight, talk with your doctor.