You don’t have to have a latent disorder for a drug to cause it, but often times drugs do trigger it if you do. There are plenty of people who have gotten e.g. an anxiety disorder or bipolar from heavy use of weed who had no family history of such things. Personally I do have a family history of bipolar and I already have GAD and a little OCD so I try to avoid it altogether, but I occasionally smoke with friends (I’m talking once every few months, which is still probably risky).
You don’t have to have a latent disorder for a drug to cause it, but often times drugs do trigger it if you do. There are plenty of people who have gotten e.g. an anxiety disorder or bipolar from heavy use of weed who had no family history of such things. Personally I do have a family history of bipolar and I already have GAD and a little OCD so I try to avoid it altogether, but I occasionally smoke with friends (I’m talking once every few months, which is still probably risky).