The high rate of morphine addiction after the Civil War contributed greatly to the problem.
I was focusing in on the patent medicine side, because I brought up the PURE FOOD & DRUG ACTS. But, yes, doctors and the general public, who bought heroin, morphine, and opiates over the counter, addicted many poor souls, who thought that they were " curing " something or other.They weren't " cured " ; however, they certainly did become addicts, or killed themselves or others.