Pengwuino said:
Yes it is possible to OD on chocolate. Well, technically it is an OD on sugar.
Gert Fyllking of the Swedish radio station RIX FM carried out an experiment in live radio, where he tried to see if he could get drunk from enough chocolate containing liqueur (it was a part of a section that is called "ask us" where the listeners send in questions that they want an answer for and the crew finds the answers).
Needless to say, he didn't succeed. After having devouered around 30 of them in a short period of time, he got so sick that he couldn't continue eating them.
After the experiment they asked an M.D. about why this occurred. The M.D. answered that after a while the human body gets a sugar shock and you basically can't eat more. This was because the blood-sugar level in your body is so high and since it was eaten during such a short time period the insulin couldn't counter much of it that you feel sick and is therefore unable to continue eating.
I'd say that this qualifies as a form of poisioning, since it has simillarities to alcohol poisoning.
So yes, you can have an OD by eating chocolate, but it must contain sugar and it must be consumed over a short period of time.
NOTE: Maybe move this to biology?