So, first of all, I know this ain't the perfect place to ask this, but it's the best I could think of right now. So here we are anyways.

Some context first: Basically, someone close to me is taking Zoloft to treat anxiety/depression. I've noticed he's never been advised about possible side effects, such as "don't mix this shit with alcohol if you value your life"... I've also figured out that, despite him being in therapy, it's not been prescribed to him at all, so he's self-medicating. We haven't talked about how dangerous this seems to me yet, as it's been recent developments, but to be honest this is not even the main thing why I'm looking for advice.

Because, basically, he's currently going through a traumatic loss of a close family member - or what should be traumatic, because for all I'm seeing he's been eerily calm and almost cheery. To be fair he flew halfways across the earth, so what I'm seeing is limited, but all of his vibes are - well - off. I'm more emotional and worried than he is and I've never even met that person, I just know how important they are to him. So, what I'm mostly worried about right now is how much of that calmness/detachment could be the Zoloft - and what will likely happen once the stach of Zoloft runs out, because with this loss goes his way to get the drug. I just want to know what to prepare for - because I don't know if I can handle this without being prepared for what I might have to expect to come. Mostly I'm just afraid, because God fucking knows I'm far from mentally stable. I've got my own issues under control, but I'm afraid of him crashing and not being able to deal with that.