Going to play Forbidden Alchemy for the first time tomorrow and just have a quick question.

Is it possible for an investigator to end up with more than one side effect card, or do new ones replace old ones like trauma cards?

As far as I know, investigators can have several side-effects. The rules doesn't say anything else. So far I've never had the issue come up, though.

Thanks. That's what I thought, and like you said I am sure it will not even come up