Sure sign of getting old Lee mate
Used to be quite a heavy drinker years ago and almost never got a hangover and used to drink anything and everything
Now that i have as good as stopped drinking its all gone pear shaped when i do take a fill of drink
Can only drink a fraction of what i used to be able to handle ( 15 or so pints used to be par for the course then onto spirits ! ) and nearly always feel drained and useless the next day !!
Drinkinf loads of Irn Bru the next day seems to do the trick for me though