RECOGNITION AND ASSESSMENT | DIFFERENTIAL DIAGNOSIS

Distinguishing Tardive Dyskinesia from Drug-Induced Parkinsonism

Differential diagnosis is critical for appropriate management of TD and DIP

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aFor the clinical diagnosis of TD, the offending agent must have been used for ≥3 months (or ≥1 month in individuals ≥60 years of age) and the movements must have been present for ≥4 weeks.2
b
DIP often appears 2 to 4 weeks after initiating or increasing the dose of a DRBA, usually by 3 months.2
cRepetitive chewing movement, sometimes with lip smacking, pouting, opening/closing of the mouth, or tongue protrusion.8
d
Typically manifested by repetitive rocking and swaying body movements.9
e
Typically repetitive, stereotypic movements in the distal limbs (e.g., repetitive foot tapping, “piano-playing” finger and toe movements, and hand rubbing).8,9 
fDRBA discontinuation or reduction can initially trigger or exacerbate TD that had been masked by DRBA treatment.10
gIncreasing the DRBA dose may diminish the chances of recovery from TD.10,11

ACh, acetylcholine; AP, antipsychotic; APA, American Psychiatric Association; D2, dopamine receptor subtype D2; DIMD, drug-induced movement disorder; DIP, drug-induced parkinsonism; DRBA, dopamine receptor–blocking agent; TD, tardive dyskinesia; VMAT2, vesicular monoamine transporter 2.
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1. Ward KM, Citrome L. Neurol Ther. 2018;7(2):233-248.
2. American Psychiatric Association. Diagnostic and Statistical Manual of Mental Disorders. 5th ed. American Psychiatric Association; 2013.
3. Gerlach J, et al. Acta Psychiatr Scand. 1988;77(4):369-378.
4. Boumans CE, et al. Schizophr Bull. 1994;20(2):339-344.
5. Caroff SN, Campbell EC. Psychiatr Clin North Am. 2016;39(3):391-411.
6. Ballesteros J, et al. J Clin Psychopharmacol. 2000;20(2):188-194.
7. Shin HW, Chung SJ. J Clin Neurol. 2012;8(1):15-21.
8. Savitt D, Jankovic J. J Neurol Sci. 2018;389:35-42.
9. Waln O, Jankovic J. Tremor Other Hyperkinet Mov (N Y). 2013;3:tre-03-161-4138-1.
10. Hauser RA, et al. CNS Spectr. 2022;27(2):208-217.
11. Stahl SM. CNS Spectr. 2017;22(6):427-434.
12. Lester DB, et al. CNS Neurosci Ther. 2010;16(3):137-162.
13. Stahl SM. Antipsychotic agents. Stahl’s Essential Pharmacology. 4th ed. Cambridge University Press; 2013:145-252.
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Your Resources on Tardive Dyskinesia and Other DIMDs

These free educational resources are sponsored and developed by Neurocrine Biosciences, Inc.
Discover TD®
In this interactive application, users can differentially diagnose and develop appropriate management plans for hypothetical, virtual patients with various movement disorders.
DIMD Course
Enroll in this free, virtual self-paced learning platform delving into various clinical aspects of the most common DRBA-induced movement disorders and earn a recognized certificate of completion. 

Media Platforms

TD Dialogues® Podcast
Hear from experts in insightful conversations as they discuss the challenges of recognizing TD and share real-world strategies to effectively support patients in managing symptoms.
Neurocrine Medical: Brave Science™ YouTube Channel
This channel features educational videos designed to further understanding of TD, including content on the proposed mechanism of disease in TD and differentiating TD from drug-induced parkinsonism.

Explore the DIMD Ecosystem Library

Want to explore our collection of DIMD educational resources on your own? Use the link below to view the full content library.
This educational content was sponsored and developed by Neurocrine Biosciences, Inc. This non-CME program is intended to provide general information about drug-induced movement disorders and not medical advice for any particular patient.

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