isn't 'alchemist' used in most manhua? I think they are both fine tbh, but I voted alchemist because it was already used. in event that alchemist is revealed to be another distinct study, however, it would be better to use pharmacist. that said, I don't think I've seen many (any that I recall, actually) manhua that make this distinction. also, if 'pharmacist' doesn't sound good, 'apothecary' (https://en.m.wikipedia.org/wiki/Apothecary) can be used instead. the drawback on this word is that it sounds like it is a noun describing the study of pharmacy while in fact it is a noun describing a person who engages in such study. any of these three are fine to me though.