You are getting headaches because of withdrawal. Although the headache comes quickly it is just withdrawal. Well, that is what my doctor told me anyways.
withdrawl? i just took one and i always get a bit of upset stomach even when i eat and then i get a headache but in between vicodin i switch meds often so i'm not on one for any length of time because i'd be taking 10 a day where now i never exceed 4 or 5. but the headache is always guaranteed now days
I was told by a Dentist that Vicodin causes pressure in the head and if you lay down after taking the meds, elevate your head to help from getting a headache. After you take meds, lay down or be still for a while and that will hopefully make upset stomach stop until meds are absorbed. Do you get dizzy too when moving around? Just curiuos.
narcotic/headaches 
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