Waddling Gait: A complication of valproate therapy and a thought beyond vitamin D deficiency

Journal Title: Sultan Qaboos University Medical Journal - Year 2020, Vol 20, Issue 1

Abstract

Proximal muscle weakness is a common presentation in paediatric-orthopaedic clinics and is frequently paired with a vitamin D deficiency diagnosis. Recently, side effects of the extensive use of antiepileptic and antipsychotic drugs such as sodium valproate in childhood disorders are being documented. Sodium valproate causes a time-dependent, drug-induced proximal myopathy. We report a 13-year-old female patient who presented at the Orthopaedic Outpatient Department at Lady Hardinge Medical College, New Delhi, India, in 2019 with an abnormal gait. The patient was taking a combination therapy of sodium valproate, risperidone and trihexyphenidyl for absence seizures and a mood disorder. Following clinical investigations, the patient was diagnosed with proximal myopathy. As a result of elevated serum alkaline phosphatase and creatine kinase myocardial band levels, sodium valproate was replaced with ethosuximide and a carnitine supplementation was prescribed. The patient fully recovered and regained full mobility. Proximal myopathy had been incorrectly managed and assumed to be caused by a vitamin D deficiency.

Authors and Affiliations

Amit Sharma, Siddhartha Sinha, Amit Narang, Dushyant K. Chouhan, Sumit Gupta

Keywords

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  • EP ID EP678543
  • DOI -
  • Views 248
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How To Cite

Amit Sharma, Siddhartha Sinha, Amit Narang, Dushyant K. Chouhan, Sumit Gupta (2020). Waddling Gait: A complication of valproate therapy and a thought beyond vitamin D deficiency. Sultan Qaboos University Medical Journal, 20(1), -. https://europub.co.uk./articles/-A-678543