Migraine Treatment Guidelines

Medication Administration

The American Academy of Allergy and Clinical Immunology recommends a standard parenteral dose of diphenhydramine as 25-50 mg, which can be administered IV separately 1
Ketorolac should be administered IV over at least 15 seconds, with a maximum daily dose not exceeding 120mg for patients under 65 years of age, and has an onset of analgesic effect in ~30 minutes with maximum effect in 1-2 hours 1
Promethazine should be administered at a concentration no greater than 25 mg/mL and at a rate not exceeding 25 mg/minute, preferably through the tubing of an IV infusion set that is known to be functioning properly 1

The combination of medications (LR fluid, ketorolac, diphenhydramine, and promethazine) addresses multiple aspects of migraine, including anti-inflammatory and analgesic effects, potential side effects, nausea, sedative properties, and hydration, which may improve migraine symptoms 1

Administering promethazine too quickly can cause severe adverse reactions, including hypotension, and careful monitoring of the IV site is necessary to avoid extravasation risk 1
Both diphenhydramine and promethazine have sedative properties and may cause significant drowsiness, and ketorolac therapy should not exceed 5 days due to the risk of adverse effects 1