Cluster headaches
Subcutaneous sumatriptan and inhaled oxygen are first-line treatments for cluster headaches.31 A single, small study20 reported that chlorpromazine may prevent cluster headaches, which suggests that D2 receptor blockade may treat such headaches. However, limited supporting evidence relegates its use to a second- or third-line therapy.
In an open-label study (N = 5), olanzapine provided some relief of pain associated with cluster headache within 20 minutes of administration.22 In another study, patients with schizophrenia and comorbid cluster headaches improved with olanzapine.21
Because evidence is limited to small prospective studies, antipsychotic treatment of cluster headache is not well established.20-22 However, olanzapine may benefit patients with comorbid cluster headaches and schizophrenia.
Nausea
The signaling pathways that mediate emesis involve 5-HT3, D2, muscarinic, and histamine receptors.32 Before 5-HT3 antagonists were available, the FGAs metoclopramide, droperidol, prochlorperazine, and promethazine were used to manage acute emesis in emergency departments.23 A double-blind, placebo-controlled trial found IV droperidol, 1.25 mg, was more effective than metoclopramide, 10 mg, or prochlorperazine, 10 mg, for relieving moderate to severe nausea in adult patients.23 However, droperidol and prochlorperazine were associated with akathisia. In addition, this trial did not find a clinically significant difference between groups—including placebo—in anxiety, sedation, or need for rescue medications.23 Use of droperidol to treat nausea decreased after the drug received a “black-box” warning for QT prolongation and torsades de pointes.
Metoclopramide is effective for treating acute migraine and associated nausea24 and has been used to treat gastroparesis because of its effect on upper GI motility. Phenothiazines have been used to treat nausea and studies have shown prochlorperazine to be more effective than promethazine.25 Some studies of prochlorperazine have reported a 44% incidence of akathisia, which limits the drug’s use in patients who may be sensitive to such effects.33 Promethazine can cause sedation and risk of tissue necrosis at the injection site.34
Among SGAs, olanzapine effectively prevented acute and delayed chemotherapy-induced nausea and vomiting in a proof-of-concept study of patients receiving high and moderate emetogenic therapies.26,27 National Comprehensive Cancer Network guidelines cite olanzapine as a potential option for treating refractory and breakthrough emesis.35 In a small study (N = 50), olanzapine showed comparable anti-nausea effect to aprepitant—a neurokinin 1 receptor antagonist—and effectively prevented chemotherapy-induced nausea and vomiting in highly emetogenic chemotherapy.36
Related Resources
- Kelley NE, Tepper DE. Rescue therapy for acute migraine, part 2: neuroleptics, antihistamines, and others. Headache. 2012;52(2):292-306.
- Dusitanond P, Young WB. Neuroleptics and migraine. Cent Nerv Syst Agents Med Chem. 2009;9(1):63-70.
Drug Brand Names
- Aprepitant • Emend
- Aripiprazole • Abilify
- Chlorpromazine • Thorazine
- Dihydroergotamine • D.H.E 45
- Droperidol • Inapsine
- Ergotamine tartrate • Ergostat
- Haloperidol • Haldol
- Ketorolac • Toradol
- Lidocaine • Xylocaine, Lidoderm
- Meperidine • Demerol
- Metoclopramide • Reglan
- Olanzapine • Zyprexa
- Prochlorperazine • Compazine
- Promethazine • Phenergan
- Quetiapine • Seroquel
- Risperidone • Risperdal
- Sumatriptan • Imitrex
- Valproate • Depakote
Disclosures
Dr. Macaluso has received grant or research support from EnVivo Pharmaceuticals, Janssen L.P., and Pfizer, Inc.
Dr. Tripathi reports no financial relationship with any company whose products are mentioned in this article or with manufacturers of competing products.