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We treated 64 emergency room patients with a primary vascular headache with dihydroergotamine (DHE), meperidine, or butorphanol. Post-treatment pain scores were lowest in the DHE group (p less than 0.01). Eight of 21 patients receiving DHE had greater than 90% reduction in pain compared with three of 19 patients receiving butorphanol and none of 22 receiving meperidine.

The cases presented provide support for the clinical utility of alpha-2 agonists during opioid dose reduction in patients with OIH as well suggesting that they may contribute to the recovery of normal nociceptive and antinociceptive responses.

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