Plenty of stuff. For example, Mercury, which was used as an ointment and a laxative, among other uses. Here's a surprisingly readable excerpt from a medical tex

Plenty of stuff. For example, Mercury, which was used as an ointment and a laxative, among other uses. Here's a surprisingly readable excerpt from a medical text written in 1787: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5545546/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5545546/