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Inhaled cannabis reduces self-reported headache severity by 47.3% and migraine severity by 49.6%, according to a recent study by Washington State University researchers published in the Journal of Pain. The study also found no evidence that cannabis caused ‘overuse headache,’ a pitfall of more conventional treatments. The researchers did see patients using larger doses of cannabis over time, indicating they may be developing tolerance to the drug.
Source: Cannabis reduces headache and migraine pain by nearly half