Abstract
Onabotulinum toxin has been used to treat a variety of headaches. We report a case of a 29-year-old woman who developed temporary and reversible atrophy of corrugator supercilii muscle after onabotulinum toxin (Botox, Allergan, Irvine, CA, USA) injection. To our best knowledge this has not been described in the literature before.
Published Version
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