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Briani C, Cagnin A, Chierichetti F, Tiberio M, Battistin L, Pizzolato G: Thiethylperazine-induced parkinsonism: in vivo demonstration of dopamine D2 receptors blockade. Eur J Neurol. 2004 Oct;11(10):709-10.
Thiethylperazine (Torecan) is a piperazine phenothiazine employed to relieve vertigo. Its use may be associated with extrapyramidal side effects (dystonia, akathisia, tardive dyskinesia) (Sulkava, 1984), but parkinsonism has rarely been described. We describe a woman who, 1 month after the onset of thiethylperazine treatment, developed parkinsonism that disappeared 2 months after withdrawal of the drug. However, cerebral single-photon emission computed tomography (SPECT) with the dopamine (DA) D2 receptors ligand 123I-iodobenzamide (123I-IBZM) revealed a persistent reduced DA D2 receptors activity (by 45%) in the basal ganglia (BG), which may be clinically not effective. |
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