Diacetylmorphine—aka heroin—was more than twice as powerful as morphine, which was already ten times stronger than opium. At a time when pneumonia and tuberculosis were the leading causes of death and antibiotics didn’t yet exist, Dreser believed he had unearthed the recipe for an elixir that would suppress coughing as effectively as codeine, an opium derivative, but without codeine’s well-known addictive qualities.
