Headache drug lacks evidence.
D000287:Administration, Topical; D000329:Advertising; D000700:Analgesics / Q000627:therapeutic use; D029772:Bryonia; D006261:Headache / Q000188:drug therapy*; D006801:Humans; D015990:Placebo Effect; D011192:Potassium Dichromate / Q000627:therapeutic use
D000700:Analgesics; D011192:Potassium Dichromate