Laudanum: alcoholic tincture of opium, sometimes sweetened with sugar (also called wine of opium). The century was marked by a widespread use: cheaper than a bottle of wine and not taxed as an alcoholic beverage. The addictive properties were not known.
Winslow's syrup for babies not only soothed their teething pain but also put them to sleep, sometimes permanently. The product contained 65 mg of morphine per fluid ounce, along with sodium carbonate, spirits foeniculi and aqua ammonia.
Coca-Cola, originally the ideal brain tonic. Coca-Cola is created by John Pemberton in Atlanta, GA, as a hangover cure and a stomach ache/headache remedy. Cocaine was an ingredient of Coke until 1904 when Congress banned it.