Grandpa and Grandma always had this stuff around, when I was a kid, just in case. Sometimes I think we over complicate, and blow things, way out of proportion !!!
Quinine is an antimalarial drug which is made from Cinchona bark[9]. The mode of action of quinine is similar to chloroquine. … Quinine alone or with other antimalarial medications is used to treat malaria cases especially in pregnant women near delivery[12].
https://en.wikipedia.org/wiki/Quinine