Premonitory symptoms in glyceryl trinitrate triggered migraine attacks: a case-control study
Abstract
Supplemental Digital Content is Available in the Text. Glyceryl trinitrate can provoke premonitory symptoms, namely yawning, nausea, photophobia, and concentration difficulties, which are most specific for an impending migraine-like headache.
How strong is the evidence?
Evidence Hub reads this as a case-control. Its evidence level is 4 of 5 (Low · observational). Observational designs can show an association but not prove cause.
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