Did you know that the human brain does this ? Blocks and binds receptors to make chemicals make your brain needs. Learning about meds and the chemicals in your brain. It’s interesting I will say that confusing. I am currently learning taking switching meds lol. My brain is broken and I need help creating these chemicals. Anyhow you should google your brain in some free time. Interesting what is cannot and can do. What it can recreate, how it can retrain itself. So much.