When do you find benefit in sequencing different dopamine receptor blockers for emergency treatment of migraine?

I do not think that intravenous dopamine-receptor antagonists provide a specific migraine-abortive benefit. They either cause drowsiness, which may be helpful to the patient in terms of inducing sleep, or cause akathisia that makes the patient want to leave the emergency room as soon as possible. At least in the latter case, it solves the problem for the emergency room physician.

Previous answer (June 10, 2026):

Under all circumstances do I advocate the use of specific medications for the aborti...

Prochlorperazine has the strongest evidence of efficacy for IV acute treatment of migraine disorder. I have not routinely switched to metoclopramide IV if prochlorperazine was not effective. I am not aware of specific studies to guide this answer.

We do switch treatments within the same class when it comes to other abortive or preventative treatments.

It would be reasonable to try a different anti-dopaminergic medication for IV treatment if the first choice is not effective.

In the treatment of ...