Clinical studies revealed several side effects of Allegra, and migraines appear to be possible. However, they were also reported in people taking a placebo, and the studies did not discriminate between migraines and other types of headaches. If you are taking Allegra and migraines occur, your healthcare provider can recommend treatment options or may prescribe a different allergy medicine.
Does Allegra Cause Migraines?
Allegra® (
fexofenadine hydrochloride) is a prescription medication used for treating seasonal
allergies and hives. As with most medicines, there are several possible
Allegra side effects, and
headaches appear to be one of them. This data comes from clinical trials where the drug was studied extensively and side effects were documented.
Allegra and Migraines: Understanding Clinical Trials
Before medicines are approved, they must go through several clinical studies in which thousands of people are given a particular medicine and are then compared to a group of people who were not given the medicine (these people took a sugar pill, or placebo). In these studies, side effects are always documented. As a result, it is possible to see which side effects occur, how often they appear, and how they compare to the group not taking the medicine. Side effects are then usually separated into those side effects that occur in more than 1 percent of people (common side effects) and those that occur in less than 1 percent of people (rare side effects).
Headaches (including migraines) were reported in up to 10.3 percent of adults taking Allegra once a day for allergies. Up to 7.2 percent of people taking a placebo reported a headache. These studies did not separate
migraine headaches from other
types of headaches.
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