Children's medicine once contained morphine.

 Link is in below👇👇

If you were a baby in the middle of the 1800s and you cried while teething, your parents might have given you Mrs. Winslow's Soothing Syrup. This "medicine" claimed that "it soothes the child, it softens the gums, [and] allays all pain." It may have done plenty of soothing, but it was also extremely dangerous—this concoction, like many patent medicines of the time, contained morphine.