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Treating Cluster Headaches With High-Flow Oxygen Appears Effective CHICAGO -- December 8, 2009 -- Patients with a cluster headache, which is characterized by bouts of excruciating pain usually near the eye or temple, were more likely to report being pain-free within 15 minutes of treatment with high-flow oxygen than patients who received a placebo treatment, according to a study published in the December 9 issue of JAMA. The current treatment for acute attacks of cluster headache is injection with the drug sumatriptan, but frequent dosing is not recommended because of adverse effects. Another treatment option is the inhalation of high-dose, high-flow oxygen, but its use may be limited because of the lack of a good quality controlled trial. Anna S. Cohen, PhD, National Hospital for Neurology and Neurosurgery, London, United Kingdom, and colleagues conducted a randomised, placebo-controlled trial of high-flow oxygen for the treatment of acute attacks of cluster headache. The study included 109 adults (aged, 18-70 years). Patients treated 4 cluster headache episodes alternately with high-flow oxygen (inhaled oxygen at 100%, 12 L/min, delivered by face mask, for 15 minutes at the start of an attack) or placebo (high-flow air). Patients were recruited and followed up between 2002 and 2007. The final analysis included 57 patients with episodic cluster headache and 19 with chronic cluster headache. Researchers found that 78% of the patients who received oxygen reported being pain-free or to have adequate relief within 15 minutes of treatment, compared with 20% of patients who received air. For other outcomes, such as being pain-free at 30 minutes or a reduction in pain up to 60 minutes, treatment with oxygen was superior to air. There were no serious adverse events related to the treatments. “To our knowledge, this is the first adequately powered trial of high-flow oxygen compared with placebo, and it confirms clinical experience and current guidelines that inhaled oxygen can be used as an acute attack therapy for episodic and chronic cluster headache,” the authors wrote. “This work paves the way for further studies to optimize the administration of oxygen and its more widespread use as an acute attack treatment in cluster headache, offering an evidence-based alternative to those who cannot take triptan agents.” SOURCE: JAMA E-mail this page to a friend or colleague! To print, use this version