The great patent medicine era.
D004358:Drug Therapy / Q000266:history; D004599:Electric Stimulation Therapy / Q000266:history / Q000295:instrumentation; D049672:History, 19th Century; D006801:Humans; D004366:Nonprescription Drugs / Q000266:history; D011781:Quackery / Q000266:history*
D004366:Nonprescription Drugs