Sphenopalatine ganglion (SPG) block for symptomatic relief of acute migraine.

A shortcut review of the literature was conducted to examine whether administering a sphenopalatine ganglion (SPG) block provides symptomatic relief in adult patients with acute migraine. 381 papers were found of which 4 included data on patients relevant to the specific clinical question, these are discussed in the paper. The author, date and country of publication, patient group studied, study type, relevant outcomes, results and study weaknesses of the best papers are tabulated. The clinical bottom line is that to date there is not enough evidence that a SPG block is likely to provide sustained symptomatic relief of acute migraine in the emergency setting. Further work is needed to establish if it can provide benefit for this patient group.