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Extrapyramidal side effects in a blue and gold macaw (Ara ararauna) treated with haloperidol and clomipramine.

Author(s): Starkey SR, Morrisey JK, Hickam HD, Albright JD, Lynch MJ

Affiliation(s): Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA.

Publication date & source: 2008-09, J Avian Med Surg., 22(3):234-9.

Publication type: Case Reports

A diagnosis of adverse extrapyramidal symptoms (EPS) was reached in a 14-year-old female blue and gold macaw (Ara ararauna) that presented with disseminated dystonia (manifesting as pacing, head bobbing, and circling), intermittent ataxia, and coarse-muscle tremors of 60 hours duration. The patient had been treated 23 days previously with haloperidol decanoate (1.7 mg/kg IM once), and for 3 days before hospitalization with clomipramine HCl at a prescribed dosage of 3.9 mg/kg PO q12h. The patient was treated with supportive care, a gradual reduction in the clomipramine dose, and intramuscular and oral diphenhydramine (2 mg/kg q12h). As commonly observed in human patients with drug-induced EPS, a dramatic resolution of clinical signs was observed within 2 hours after the first intramuscular administration of diphenhydramine. It is recommended that EPS be considered in macaws experiencing neurologic signs secondary to clomipramine administration and, in particular, in those treated concurrently or previously with haloperidol.

Page last updated: 2009-02-08

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