TOPLINE:

Vomiting during a migraine attack is associated with rapid pain relief for some patients, and those who had previously experienced such relief were more likely to intentionally induce vomiting as a self-treatment strategy, a cross-sectional study found.

METHODOLOGY:

• Researchers conducted a cross-sectional study at a headache center in Florence, Italy, in 2023, including 106 adults (mean age, 43 years; 86% women) who had a diagnosis of migraine with or without aura, chronic migraine, or medication overuse headache.
• Participants completed a questionnaire that focused on the frequency of vomiting during migraine attacks, the number of vomiting episodes per attack, pain intensity on a numerical rating scale (0-10) during attacks with and without vomiting, the time taken for pain relief, pain recurrence patterns, and voluntary vomiting induction behaviors.
• The primary outcomes were the prevalence, temporal patterns, and degree of vomiting-induced migraine pain relief (VIMPR), defined as pain reduction or cessation following vomiting episodes.
• Data on demographic and clinical characteristics were additionally collected.

TAKEAWAY:

• About 77% of patients experienced vomiting during migraine attacks, and 55% reported experiencing VIMPR. Of these patients, 27% achieved complete pain freedom, while 73% reported temporary relief followed by pain recurrence. Among those whose pain returned, 58% said that it was less severe than before vomiting.
• Migraine attacks with vomiting were significantly more painful than those without vomiting (median pain intensity, 9 vs 7; P < .001). Pain intensity did not vary significantly by the number of vomiting episodes per attack.
• Among patients experiencing VIMPR, pain relief began within seconds in 29% of patients, within minutes in 40%, and within hours in 31%.
• Voluntary vomiting induction was significantly more common among patients who had previously experienced VIMPR than among those who had not (40% vs 11%; P = .007), suggesting that some patients may use it as a self-treatment strategy.

IN PRACTICE:

“The rapid onset of VIMPR reported by patients and the learned behavior of voluntary vomiting induction are consistent with the involvement of endogenous antinociceptive mechanisms,” the investigators wrote. They added, “To better understand the role of vomiting in migraine pathophysiology, future studies should prioritize multimodal approaches combining prospective data collection, ideally complemented by neurophysiological/neuroimaging monitoring.”

SOURCE:

The study was led by Antonio Munafò, MD, Careggi University Hospital, Florence, Italy. It was published online on May 27 in Headache: The Journal of Head and Face Pain.

LIMITATIONS:

The exploratory investigation relied on an ad hoc, nonvalidated questionnaire and retrospective self-reports, introducing a potential recall bias. The lack of data on acute medication use during individual migraine attacks was a significant limitation. Also, recruitment of participants from a single headache center may have introduced selection bias and limited the generalizability of the findings. Lastly, the relatively small sample size prevented detailed subgroup characterization, and the absence of objective neurobiological measures, such as neuroimaging and monitoring of neurophysiologic parameters, prevented detailed mechanistic interpretations.

DISCLOSURES:

The study did not receive any specific funding. Disclosure information for the study investigators is available in the original article.

This article was created using several editorial tools, including AI, as part of the process. Human editors reviewed this content before publication.