Aspirin and Heroin were both invented in a two-week period by the same man: Felix Hoffmann, a German chemist who worked for Bayer (and under Adolf Von Baeyer) in the late 1880’s.
Tidbit

Aspirin and Heroin were both invented in a two-week period by the same man: Felix Hoffmann, a German chemist who worked for Bayer (and under Adolf Von Baeyer) in the late 1880’s.