The role of Caffeine in migraine: trigger or treatment?

Migraine, a prevalent neurological disorder, is characterized by recurrent, severe headaches often accompanied by nausea, vomiting, and sensitivity to light and sound. The dual role of caffeine as both a potential trigger and a treatment for migraines has been the subject of numerous studies. This review examines the available evidence regarding caffeine’s impact on migraines, drawing from a variety of studies up to June 2020. It is noted that caffeine can act as a trigger in a small percentage of migraine sufferers, with withdrawal from caffeine being a more frequent cause of migraine attacks. Specifically, caffeine or its withdrawal was identified as a trigger in 2.4% to 30% of cases in various studies. However, the exact mechanisms by which caffeine influences migraines are still under investigation.

Caffeine’s effectiveness in treating acute migraines has been well-documented, especially when used in combination with other analgesics. Studies have shown that combinations such as acetaminophen, aspirin, and caffeine can be more effective than single analgesics in relieving migraine symptoms. Caffeine’s role in these treatments is thought to be due to its vasoconstrictive properties and its ability to enhance the absorption and efficacy of other pain relievers.

Despite its benefits, chronic overuse of caffeine can lead to medication-overuse headaches, and sudden cessation can trigger withdrawal headaches. Migraine patients are advised to monitor their caffeine intake carefully, maintaining a consistent daily amount to avoid triggering headaches. Moderate consumption of caffeine (less than 200 mg per day) is generally considered safe and may be beneficial in some cases.