Drinking slows down my brain and reduces the number of threads running in parallel. Sometimes very useful to enable normal-passing interaction in social environments. Or just to be able to focus. Lots of people with ADHD drink to achieve a more single threaded experience.

Edit to add: I don't meant to encourage drinking as a tool for managing ADHD. It works but it's a blunt and dangerous tool. If you're at that point, you'll absolutely love the results you get from the healthier strategies: Understanding yourself; developing a suite of tools that don't involve a slippery slope; and curating your social and physical environment carefully.