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Migraine is a common and often disabling neurovascular disorder. Changes in the metabolism and the central processing of serotonin, as well as abnormalities in the modulation of the central and peripheral trigeminal nociceptive pathways, have been shown to play signifi cant roles in migraine pathophysiology. Recent evidence suggests that a low serotonin state facilitates activation of the trigeminal nociceptive pathways. In addition, several pharmacological agents that modulate serotonin are used in the treatment of migraine. Specifi cally there are seven FDA approved, 5-hydroxytryptamine (5-HT) 1B/1D receptor agonists, used for the acute abortive therapy of migraine. Zolmitriptan is one such triptan. Zolmitriptan is available as a tablet, orally disintegrating tablet and as a nasal spray. It is rapidly absorbed and detectable within the plasma, within 2 to 5 minutes for the nasal spray and within 15 minutes for the tablet. Zolmitriptan reaches peak plasma levels in 2-4 hours, with good levels maintained for up to 6 hours. Although the metabolism of zolmitriptan is predominantly hepatic, only 25% of zolmitriptan is bound to plasma proteins. Thus it is unlikely for drug interactions involving the dis- placement of highly protein-bound drugs. Zolmitriptan is very well tolerated with less than half of participants in clinical trials reporting adverse events, most of which were mild and transient. Although rare, serious cardiovascular events have been reported with all triptans. However, when patients are appropriately selected, zolmitriptan is both, a safe and effective acute migraine abortive agent. In this article, we will fi rst briefl y review the biological role of serotonin and the literature linking serotonin to migraine pathophysiology. This will be followed by a comprehensive review of the pharmacodynamics, pharmacokinetics and effi cacy of zolmitriptan. Finally, the clinical application of the use of zolmitriptan in migraine therapy will be discussed.

A Review of the Pharmacokinetics, Pharmacodynamics and Efficacy of Zolmitriptan in the Acute Abortive Treatment of Migraine