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Inicio Psiquiatría Biológica Respiratory depression caused by low dose of olanzapine: A case report
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Vol. 30. Issue 2.
(May - August 2023)
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Vol. 30. Issue 2.
(May - August 2023)
Review Article
Respiratory depression caused by low dose of olanzapine: A case report
Depresión respiratoria causada por dosis baja de Olanzapina: informe de un caso
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Masatoshi Inoue
Tsushima City Hospital, postcode:496-8537, 3-73 Tachibana-cho, Tsushima-city, Aichi, Japan
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Table 1. Laboratory investigations for the patient. Blood gas data is venous.
Abstract
Objective

Olanzapine is widely used throughout the world to treat patients with schizophrenia and bipolar disorder. Olanzapine has numerous side effects, but respiratory depression has not been reported with doses as low as 5 mg.

Clinical case

An elderly woman presented with severe hypercarbia, hypoxia, and impaired consciousness possibly due to low doses of oral olanzapine. There is no accepted antidote for the side effects of olanzapine, so we followed the patient with respiratory support and electrolyte correction. Symptoms improved after 2 weeks and did not recur.

Results and conclusions

Elderly patients, women, and non-smokers may have elevated olanzapine concentrations and may do better with lower than usual doses. If somnolence is observed in a patient taking olanzapine, a blood gas should be obtained and appropriate respiratory care should be provided. We expect that this case report will add to the existing body of literature on the appropriate use of olanzapine.

Keywords:
Respiratory depression
Olanzapine
Schizophrenia
RESUMEN
Objetivo

Olanzapina se utiliza de manera amplia a nivel mundial para tratar a los pacientes con esquizofrenia y trastorno bipolar. Tiene numerosos efectos secundarios, pero no se había reportado depresión respiratoria con dosis bajas de 5 mg.

Caso clínico

Una mujer mayor acudió con hipercarbia severa, hipoxia y deterioro de la consciencia, debido posiblemente a la administración de dosis bajas de olanzapina oral. No existe antídoto aceptado para los efectos secundarios de olanzapina, por lo que seguimos a la paciente con soporte respiratorio y corrección de electrolitos. Los síntomas mejoraron transcurridas dos semanas, no produciéndose recidiva.

Resultados y conclusiones

Los pacientes mayores, mujeres, y no fumadores pueden tener concentraciones elevadas de olanzapina, siendo adecuado utilizar dosis más bajas de lo habitual. De observarse somnolencia en un paciente que toma olanzapina, deberán obtenerse gases sanguíneos, y aportarse cuidados respiratorios adecuados. Esperamos que este informe de caso ayude al cuerpo existente de la literatura con relación al uso adecuado de olanzapina.

Palabras clave:
Depresión respiratoria
Olanzapina
Esquizofrenia

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