* Specific glucocorticoid dose and tapering regimens may vary according to individual cluster episode patterns. For patients unable to take glucocorticoids due to risk of adverse effects such as hyperglycemia or hypertension, verapamil or other alternative preventive agents may be given alone. Refer to UpToDate topic for additional details.
¶ An electrocardiogram may be obtained at baseline and should be obtained after each dose increment above a total daily dose of 480 mg to assess for cardiac arrhythmias.
Δ For patients with partial response to verapamil, additional alternative therapy may provide adjunctive benefit. Alternative preventive therapies are used alone or in combination for other patients who do not respond or have a contraindication to verapamil. Refer to UpToDate topic for additional details.