In the postwar years, ephedrine was used legally as an antihistamine in the over-the-counter medicine Sudafed. The ephedrine method for meth, though, lay dormant for a long time. It was rediscovered by the underworld in the United States in the early 1980s. It democratized methamphetamine. One place this happened was in the San Diego area, largely due to a man by the name of Donald Stenger.
