Patients at the New England Center for Headache decreased their migraine and cluster headache intensity by applying capsaicin cream to their nasal passages. (ntoi.ie)
The only use I know of for pure capsaicin is in the pharmaceutical industry where it is used in making capsaicin creams for treating topical pain and arthritis pain. (fieryfoodscentral.com)
Dave, Where can I get capsaicin cream at more than usual.1 % strength? (fieryfoodscentral.com)