I see this question everywhere. =P

It varies from game to game. Quick save before you eat any mushroom and after an hour or
so, you'll receive the effect of that type of mushroom. Remember which ones are bad, and
which are good. Some (I think) have no effect.

PS. If you restart, the mushroom effects will be different. For my old game, the brown
mushrooms were the energy mushrooms. ;)

in my game the orange mushroom is the stamina 1 and the brown 1 is the stomache ache

In my game the orange and brown ones are good. but he's right, it does vary from game to
game.

in mi game...
orange= energy
brown = sleepy
if you eat both at the same time nethier will effect you....
if you take one of each mushrooms at once all you will get is a stomach ache (i think red
n black the ones with the poka dots are the ones that will kill you)