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Hydrocodone and other opiates can also have a powerful nauseating effect. But be it the ibuprofen or the hydrocodone causing it, eat some food, wait 15minutes, then take the medication. I've found when taken "with" food, it doesn't really help much since they both hit your stomach at the same time. Pro-tip: Eat something that'll taste decent coming back up Naproxen (Aleve) is another popular OTC NSAID which lasts much longer than Ibuprofen. If that's causing your stomach ache, it'd be half as many.
Sucks about the crash, but glad you didn't get too broken.