So, he is not against all types of medication - he is against certain types of medication. That is fine. But for himself. Your body = your choice. No-one should tell you what medication you should and should not do aside from a trained medical professional.
Besides, I don't believe it is difficult to tell if your natal family are arguing or having a great time, just because you are all loud. Sorry, but surely he can read emotions? That is a way of undermining you and at the same time being negative about your family.
There is a book called Coercive Control by Evan Stark, which talks about how women snap as a result of being controlled. His cases are far more extreme than what you say, though no physical violence is good, but his argument is about the entire context of the snapping, and not just that one point.
He argues that snapping in the context of coercive control is about asserting the will to live more freely. You can snap in lots of ways.
Stark has a section on the differences between high conflict relationships and controlling, abusive ones. But the really interesting point is the way in which control happens at the micro-level of your life. It is about what you wear, who you see, where you go, when you sleep, what you eat - all of these things. And the controller uses the knowledge he has about you to fit the strategies to what works.
He fits this within the larger context of inequalities in society. It is quite an academic text, but he has been instrumental in getting coercive control on to the political agenda.
The Crown Prosecution Service has guidelines on coercive control, which list areas of evidence. I personally think it would be extremely difficult to prosecute where it is less overt and more manipulative; partly because it works by making you think you are wrong in your own beliefs and behaviours. Which is why it is important to recognise it and set very clear boundaries (and become more autonomous, regardless).
I am on my phone but I will try to link to the CPS guidelines. Not because I think you should prosecute your DH, but to look at the list of behaviours and make a judgement about how many fit.