Madam, cetirizine hydrochloride, an antihistamine, is the active constituent of Zyrtec® that functions as competitive peripheral H1 receptor inhibitor.1 Cetirizine is known to have reduced blood-brain barrier penetration due to its larger mass, lipophobic properties and increased attraction for peripheral H1 receptors. Oculogyric crisis is a neurologic impairment defined by bilateral dystonic, ...

Background A 36-year-old Thai female who underwent a thymectomy under general anesthesia developed acute abnormal movements in the craniofacial region immediately after awakening with preserved consciousness. Phenomenology Intermittent abnormal movements included oculogyric crisis; tongue protrusion; blepharospasm; and oro-mandibular dystonia consisting of risus sardonicus, jaw opening, and r...

Antidopaminergic drugs are known to induce extrapyramidal symptoms. Clebopride, a dopamine antagonist, also can produce parkinsonism, tardive dyskinesia, tardive dystonia, hemifacial dystonia, or oculogyric crisis; however, acute dystonic reaction caused by clebopride has not been reported in adults. We report two young men who experienced acute cervical dystonia within a few days of taking cle...

This article will review the case of a young patient with mental retardation, autistic disorder, and Tourette Syndrome who exhibited a favourable treatment response preferentially to risperidone. His presentation, however, was complicated by an exquisite sensitivity to risperidone displayed in the form of recurrent oculogyric crises. In this article, we will outline a review of the case, a surv...

This article will review the case of a young patient with mental retardation a , autistic disorder, and Tourette Syndrome who exhibited a favourable treatment response preferentially to risperidone. His presentation, however, was complicated by an exquisite sensitivity to risperidone displayed in the form of recurrent oculogyric crises. In this article, we will outline a review of the case, a s...