Index finger pointing posture in a patient with drug-induced foot tremor

Gohei Yamada; Takanari Toyoda; Eiichi Katada; Noriyuki Matsukawa

doi:10.1016/j.prdoa.2021.100111

Index finger pointing posture in a patient with drug-induced foot tremor

Clin Park Relat Disord. 2021 Oct 7:5:100111. doi: 10.1016/j.prdoa.2021.100111. eCollection 2021.

Authors

Gohei Yamada¹, Takanari Toyoda¹, Eiichi Katada¹, Noriyuki Matsukawa²

Affiliations

¹ Department of Neurology, Nagoya City University West Medical Center, Aichi, Japan.
² Department of Neurology, Nagoya City University Graduate School of Medical Sciences, Aichi, Japan.

Abstract

A 41-year-old woman who had been taking paroxetine began taking tramadol for bilateral ankle pain. A few days later, the patient presented acutely with both feet tremors. During a mental arithmetic task, index-finger pointing posture briefly appeared on the left side. Co-administration of paroxetine and tramadol increases the risk of serotonin toxicity. This is the first reported case of index-finger pointing posture which was associated with serotonin toxicity.

Keywords: Drug-induced movement disorder; Index finger pointing posture; Paroxetine; Serotonin toxicity; Tramadol.

Publication types

Case Reports