A small study by Italian researchers shows that acupuncture can be used to interrupt an episode of cluster headaches. Four patients were treated either with acupuncture alone, or acupuncture plus the drug verapamil. Acupuncture was given with diminishing frequency for a twelve week period, and according to traditional Chinese medicine principles. All patients experienced an interruption to their cluster headaches.
(Acupuncture in cluster headache: four cases and review of the literature. Neurology Science, 28 May 2014.)