Hydrocodone syrup question?

Hydrocodone can make some epople really drowsy or dizzy. I'm not sure why your head hurts though, that is not a typical side effect. If the headache gets worse or you feel like you are going to pass out, then I would get some help. Otherwise, you are most likely just experiencing normal side effects. Some stomach upset/nausea can be normal too, especially if you did not eat with it.