IV: intravenous; IM: intramuscular.
* For patients weighing <50 kg or >64 years old, use a reduced dose of ketorolac (15 mg IV or 30 mg IM once).
ΒΆ Preventive therapy may be given either 30 to 60 minutes prior to sexual activity or as daily prophylaxis for patients with headache attacks that are frequent. Initial dosing may be subsequently titrated to effect as tolerated. If symptoms persist with the selected initial preventive medication used at a therapeutic dose, discontinue and switch to the alternative agent.