What is it about?
People who suffer from frequent headaches sometimes fall into a vicious cycle: they take painkillers more and more often, and the medications themselves begin to cause additional headaches — a condition doctors call medication-overuse headache (MOH). Our study is the first to look at how this condition affects sleep. We followed 171 patients with MOH and 173 people with ordinary headaches over two years. We found that six out of ten MOH patients had chronic insomnia, and nearly four out of ten had restless legs syndrome — significantly more than in people whose headaches were not complicated by painkiller overuse. Insomnia in these patients was also more severe: the most disabling form was 4.5 times as common. The key discovery was timing. Insomnia typically appeared about four months after patients had already developed MOH, suggesting that the headache–painkiller cycle was driving their sleep problems, not the other way around. When patients received treatment aimed at breaking the overuse cycle — education, withdrawal of excess painkillers, and preventive headache medication — their sleep improved dramatically, even though no sleeping pills were used. Chronic insomnia dropped from 67% to 33%, restless legs from 39% to 15%, and daytime sleepiness disappeared entirely.
Featured Image
Photo by Claudia Wolff on Unsplash
Why is it important?
This is the first prospective study to investigate sleep disorders specifically in patients with medication-overuse headache. Until now, the link between painkiller overuse and sleep disturbances had never been formally examined, and the current European Academy of Neurology guideline on MOH management does not mention sleep at all. Our findings have two immediate clinical implications. First, doctors treating patients with frequent headaches and painkiller overuse should routinely ask about sleep quality — insomnia and restless legs are far more common in this group than previously recognised. Second, and perhaps most importantly, these sleep disorders can be reversed simply by treating the headache problem itself, without adding sleeping pills. This matters because sleeping medications carry their own risks of dependency, which is the last thing a patient already struggling with painkiller overuse needs. The study also offers a new perspective on mechanism: the fact that restless legs syndrome improved only in MOH patients (and not in controls) suggests that chronic analgesic use itself may be disrupting the brain pathways that regulate leg movements during sleep — a finding that opens a new direction for research into drug-induced sleep disorders.
Perspectives
This study grew out of a pattern I kept seeing in my headache clinic over many years: patients with medication-overuse headache almost always complained about poor sleep, yet when I searched the literature, I found that no one had systematically studied this connection. It seemed like a blind spot — sleep specialists focused on sleep, headache specialists focused on headache, and neither group was looking at the overlap in MOH patients. What surprised me most was not that sleep disorders were common — I expected that — but how clearly the timing told the story. Insomnia appeared months after the overuse pattern was already established, which gave us confidence that we were seeing a consequence, not just a coincidence. And the fact that sleep improved after headache treatment, without any sleeping pills, was the most gratifying result of all. It confirmed what I had suspected clinically but had never been able to prove. I hope this work encourages neurologists to look beyond the headache itself and ask their patients a simple question: 'How are you sleeping?' It might reveal a burden that is treatable — and one they do not need an extra prescription for.
Elena Lebedeva
The Ural State Medical University
Read the Original
This page is a summary of: Sleep Disorders in Medication‐Overuse Headache: Prevalence and Associated Factors, European Journal of Neurology, July 2026, Wiley,
DOI: 10.1111/ene.70685.
You can read the full text:
Resources
Contributors
The following have contributed to this page
