P-R Photo/Julie Robinson Robard Although this trade card for Mrs. Winslows Soothing Syrup for teething babies looks loving and nurturing, each fluid ounce of the medication contained 65 percent morphine sulphate. First marketed in Bangor, Maine, in 1849, the formula claimed to sooth any human or animal. Heavy advertising in the form of colorful trade cards, newspaper ads, recipe books and calendars assured that Mrs. Winslow was one of the most recognized and trusted names in patent medicines. In 1911, the American Medical Association put out a publication that incriminated Mrs. Winslows Soothing Syrup as a "baby killer." It continued to be sold in England until 1930.