Well around that same time people thought x-rays were so great they would bathe in them like at a tanning salon. Unexpectedly, they got radiation sickness and cancer and many died. I guess it was a darwinistically self limiting fad.
(Re:x-Rays and other “Science Zeigeists”)
Aspirin was relatively new during the Spanish Flu. It was used to reduce the fever by giving it in massive doses (by today’s standards), and exacerbated the death toll by half (by some estimates).