Baclofen-induced myoclonus in patients with renal impairment: A case series

Baclofen is a derivative of gamma amino butyric acid and is used for control of pain and muscular spasms. It is primarily excreted via the kidneys. In patients with impaired renal functions, the half-life of baclofen is prolonged and symptoms of toxicity can occur with normal doses. Commonly reporte...

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Main Authors: Manudi Nushara Vidanapathirana, Thamalee Palliyaguruge, Eranga Wijewickrama
Format: Article
Language:English
Published: SAGE Publishing 2023-09-01
Series:SAGE Open Medical Case Reports
Online Access:https://doi.org/10.1177/2050313X231200966
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author Manudi Nushara Vidanapathirana
Thamalee Palliyaguruge
Eranga Wijewickrama
author_facet Manudi Nushara Vidanapathirana
Thamalee Palliyaguruge
Eranga Wijewickrama
author_sort Manudi Nushara Vidanapathirana
collection DOAJ
description Baclofen is a derivative of gamma amino butyric acid and is used for control of pain and muscular spasms. It is primarily excreted via the kidneys. In patients with impaired renal functions, the half-life of baclofen is prolonged and symptoms of toxicity can occur with normal doses. Commonly reported symptoms of baclofen toxicity are somnolence, altered mentation, seizures and respiratory depression. Myoclonus secondary to baclofen toxicity is scarcely reported. This case series describes two patients with chronic kidney disease (CKD) who were prescribed regular doses of baclofen for analgesia, and subsequently developed generalized myoclonus. The symptoms resolved with omission of baclofen and haemodialysis. There is currently no consensus on dose modification of baclofen in renal impairment for prevention of adverse neurological events. However, considering the surmounting evidence for low threshold of baclofen toxicity in CKD, dose adjustment protocols or consensus on contraindication need to be established.
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spelling doaj.art-cfa493d16250402b87633a087fe588142023-09-15T02:03:22ZengSAGE PublishingSAGE Open Medical Case Reports2050-313X2023-09-011110.1177/2050313X231200966Baclofen-induced myoclonus in patients with renal impairment: A case seriesManudi Nushara Vidanapathirana0Thamalee Palliyaguruge1Eranga Wijewickrama2Professorial Medical Unit, National Hospital of Sri Lanka, Colombo, Sri LankaProfessorial Medical Unit, National Hospital of Sri Lanka, Colombo, Sri LankaUniversity of Colombo, Sri LankaBaclofen is a derivative of gamma amino butyric acid and is used for control of pain and muscular spasms. It is primarily excreted via the kidneys. In patients with impaired renal functions, the half-life of baclofen is prolonged and symptoms of toxicity can occur with normal doses. Commonly reported symptoms of baclofen toxicity are somnolence, altered mentation, seizures and respiratory depression. Myoclonus secondary to baclofen toxicity is scarcely reported. This case series describes two patients with chronic kidney disease (CKD) who were prescribed regular doses of baclofen for analgesia, and subsequently developed generalized myoclonus. The symptoms resolved with omission of baclofen and haemodialysis. There is currently no consensus on dose modification of baclofen in renal impairment for prevention of adverse neurological events. However, considering the surmounting evidence for low threshold of baclofen toxicity in CKD, dose adjustment protocols or consensus on contraindication need to be established.https://doi.org/10.1177/2050313X231200966
spellingShingle Manudi Nushara Vidanapathirana
Thamalee Palliyaguruge
Eranga Wijewickrama
Baclofen-induced myoclonus in patients with renal impairment: A case series
SAGE Open Medical Case Reports
title Baclofen-induced myoclonus in patients with renal impairment: A case series
title_full Baclofen-induced myoclonus in patients with renal impairment: A case series
title_fullStr Baclofen-induced myoclonus in patients with renal impairment: A case series
title_full_unstemmed Baclofen-induced myoclonus in patients with renal impairment: A case series
title_short Baclofen-induced myoclonus in patients with renal impairment: A case series
title_sort baclofen induced myoclonus in patients with renal impairment a case series
url https://doi.org/10.1177/2050313X231200966
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