Hey there,
I wasnt allowed to drink for 6 months after my transplant. When I asked my doc about it, he said, " we translant you so you can live." So yes you can drink but dont do it in excess.
If it makes you feel better, I have taken my rejection meds with a swig of beer. Probably not the best idea I have ever had but I havent seen any ill effects from it <img title="Wink" src="include/wysiwyg/tinymce/jscripts/tiny_mce/plugins/emotions/img/smiley-wink.gif" alt="Wink" border="0" />
Good luck!