I'm sure you'll get a very scientific response (Mark?

) but all I can say is that alcohol is toxic and kills brain cells in the healthiest of brains. I know that I permanently feel hung over as it is and don't want to add to the horrible feeling or to my recovery time!
I'd say if it makes you feel bad don't do it!It's your body's way of telling you it doesn't like what you're doing!
I've seen it suggested to stick to one drink so maybe you could try that. At Christmas I had perrier with a splash of wine in a nice wine glass just to feel like it was a celebration.
If your friends give you a hard time just remind them that now they have a designated driver! Or consider new friends or ways to socialise.
I think you had your accident around the same time I did... I hope your feeling much better and getting back to the things you enjoy that matter!
CC