People with headache experience have pain, but also can suffer from all sorts of other neurological symptoms, indicates findings of a recent study. Gastric stasis, the delayed emptying of the stomach, is one of these symptoms. With gastric stasis, oral medications are slowly disintegrated, which may limit the efficacy of the medication. This research may have a significant impact on how migraineurs are treated.
Recent research has found that stomachs of people with migraine empty slowly all the time, not just during a migraine. It also does not appear to worsen during an acute attack.
A great summary of study details is available on About.com’s headache page.