It is hard to do any real damage with Caffeine however taking too much wont feel nice !!
Make an effort to drink lots of water. Gateraid or similar is also a good move as it replaces lost electrolites as well.
My instructors page and www.studiotrax.net for all things recording.
my toons Brought to you by Dr BadGAS
my toons Brought to you by Dr BadGAS