Brief Psychotic Disorder Medication
- Author: Mohammed A Memon, MD; Chief Editor: David Bienenfeld, MD more...
Medication Summary
The goals of pharmacotherapy are to reduce morbidity and to prevent complications.
Antipsychotics
Class Summary
Are high-potency agents (eg, haloperidol, droperidol) that provide rapid, predictable, and effective sedation in the management of patients who are acutely psychotic. They are less sedating and more easily titrated but are more likely to cause extrapyramidal syndrome (EPS) than lower-potency agents. They are often combined in the same syringe with a benzodiazepine (eg, lorazepam, diazepam) for better sedation and anxiolysis and for less dystonia or akathisia. For prophylaxis of extrapyramidal adverse effects, temporary use of a serotonin-dopamine antagonist may be needed. Administered IM or IV. (In a less emergent setting, administered PO [haloperidol only]). Haloperidol also has a monthly depot form (haloperidol decanoate) that is not useful for brief psychotic disorder because of short duration of the disorder. Depot antipsychotics are not intended for use in the emergent setting.
Haloperidol (Haldol)
Controls psychosis and provides rapid tranquilization. Administer with a benzodiazepine to protect against lowered seizure threshold. In emergencies, select high-potency antipsychotic available in tab, liquid, or IM form. In author's experience, Haldol IV can be used effectively in small doses of 1-2 mg q8h for 2-3 d for acute psychotic agitation, and it can be continued PO for the next several d until symptoms completely subside. Note that IV route is also effective for delirium in case of difficulty differentiating brief psychotic disorder and delirium.
Thiothixene (Navane)
Blocks postsynaptic blockade of CNS dopamine receptors, inhibiting dopamine-mediated effects. Provides rapid tranquilization in PO and IM forms.
Risperidone (Risperdal)
Unlike haloperidol, risperidone has serotonergic blocking effects that alleviate negative symptoms of psychosis (eg, anhedonia, avolition, amotivation, flat affect). Well tolerated with fewer extrapyramidal adverse effects than with typical antipsychotics. Doses > 6 mg/d increase risk of extrapyramidal effects.
Olanzapine (Zyprexa)
May inhibit serotonin, muscarinic, and dopamine effects. Efficacy similar to risperidone, fewer dose-dependent adverse effects but more concern about weight gain.
Quetiapine (Seroquel)
May act by antagonizing dopamine and serotonin effects. Efficacy similar to risperidone and olanzapine. Fewer dose-dependent adverse effects and less concern of weight gain.
Paliperidone (Invega)
Major active metabolite of risperidone and first oral agent allowing once-daily dosing. Indicated for treatment of acute schizophrenia. Mechanism of action not completely understood but thought to mediate central receptor antagonism of dopamine type 2 (D2) and serotonin type 2 (5HT2A). Also elicits antagonist activity at adrenergic alpha1 and alpha2 receptors and histamine-1 receptors. Has no affinity for cholinergic, muscarinic, or beta-adrenergic receptors. Available as extended-release drug delivery system via osmotic pressure.
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