I just tested my theory. I drank a Energy drink. No change. I drank a Crazy drink and I lost 3 of my rewards.
After losing some time off the "going crazy" moodlet, I gained back 1 of my rewards.
It appears this is a side effect of the crazy drink. I'll edit this same post (as to prevent overflow of this thread) after I do some more testing.
Okay i've tested all of my mood drinks.It appears that Crazy Drink is the only one to cause this. And you get them back as soon as the "going crazy" mood lit wears off. Energy drink, sorrow annihilator, party drink, romance drink and skill gain drink have no effect on this whatsoever. I am going to assume this isn't a glitch, just a normal side effect of the crazy drink.
Crazy drink's discription did say "There's no telling what your sim will do."