One of my closest friends of 15+ years has recently been prescribed Sertraline for depression and anxiety. In the time since, his personality has had a definite, noticeable change. He's becoming arrogant, cocky, fixated on calling out errors made by others etc. Examples 'I'm a fucking genius, I've nailed it, everyone go home no one can best this' about an idea he had to solve a problem, 'No, not that one, there's another XYZ business locally, God how could you not remember that? You've lived here how many years and you don't know that? Are you ok?' when I made a mistake talking about a location. Probably sounds minor written down but they're big noticeable changes from how I've ever known him to be over the entire friendship.
I apologise now if I sound ignorant and I don't mean to offend at all, but could it be the anti-depressants causing it? And if so, should I tell him? I feel like he should know, in part because it's making talking to him hard work, but moreso because I'm worried about him, is this something he should be aware of so he can tell his GP/MH support team? But how would you go about it? I don't want him to feel like I'm putting him down or having a go at him.
I'm as sure as I can be that this ISN'T how he really is. I knew him long before he began to suffer with his MH, we've been in very regular contact the whole time, and he's never shown any hints of arrogance/nastiness before now.
WWYD?