Olanzapine-associated myoclonus
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Updated: May 26, 2026

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale
Published on: July 8, 2025
Jennifer Block Rosen1, Mark J Milstein, Sheryl R Haut
1Montefiore Medical Center, 111 East 210th Street, Bronx, NY 10467, USA.
Abstract:
Olanzapine is an atypical antipsychotic drug that infrequently has been reported to cause seizures and myoclonus despite a small proconvulsant risk. This is the first report of generalized myoclonus induced in a patient who had been maintained on low dose olanzapine for over seven years without any change in her dose. Olanzapine was discontinued, and the myoclonic jerks completely resolved within 48 h.
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