Objectives. Goreisan is a traditional Chinese medicine that is effective for the management of climate–related chronic headache. However, no large clinical scientific study of goreisan has yet been reported. The purpose of this study is to investigate the clinical characteristics of the chronic headache patients in whom goreisan is effective.
Patients and Methods. We prescribed goreisan for 45 patients who were diagnosed with primary headache at our headache clinic. The patients age was from 14 to 77 years–old. The study population included 8 men and 37 women. We evaluated the clinical effects of goreisan for 39 patients at one months after the prescription. Final diagnoses were migraine without aura for 21, migraine with aura for 5, tension type headache for 15, medication overuse headache for 6 patients, respectively.
Results. The intensity or frequency of the headache improved in 33 patients. No effect was observed in 6 patients. Three patients whose headache did not related with climate showed no effect of goreisan. Climate–related primary headache was patient’s self–reported diagnoses, however, this information was valuable to predict the effect of goreisan.
Conclusion. Goreisan was effective for the patients with climate–related primary headache. Goreisan may suppress primary headache by protecting glymphatic flow.
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