Why does Hydrocodone make me sick, but Lortab does not?

in the past, I have taken a half lortab and then the other half 30 mins later before and it didnt make me sick, but i didnt notice any effect. i have been taking hydrocodone (it says generic for Lorecet 10-650) and it is making me extremely nauseous. i am not allowed to eat solid foods so i cant take it on a full stomach. and i was wondering the difference between the generic hydrocodone and the lortab

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Answer:
The issue is the Lorcet ten has more Tylenol in than the Lortab. Evidentally that extra 150mg's of Tylenol is doing it. This is general.

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Answer:
lortab comes in 2.5 mg ,5 mg ,7.5 mg and 10 mg. check what dosage you where taking before the 10 mg. ones you’re now.and actually there is a difference between generic and brand name .Generics can be 10-20% less of the active ingredients

Also Lortab is hydrocodone (vicoden) and loracet is oxycodone(percocet) which are stronger ,that could be why as well