Your grandmother's teething medicine was liquid morphine. πΌ . . . Mrs. Winslow's Soothing Syrup hit shelves in 1849 with 65 mg of morphine per ounce β enough to sedate an adult. Mothers dosed teething babies with a spoonful. The American Medical Association finally called it a 'baby killer' in 1911. It stayed on shelves until the 1930s.
Source
American Medical Association, 1911, 'Nostrums and Quackery' report labeling Mrs. Winslow's Soothing Syrup a 'baby killer'
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