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HOME > J Mov Disord > Volume 2(2); 2009 > Article
Original Article
Anticholinergic Agents Can Induce Oromandibular Dyskinesia
Hee-Young Shin, Won Tae Yoon, Won Yong Lee
Journal of Movement Disorders 2009;2(2):69-71.
DOI: https://doi.org/10.14802/jmd.09018
Published online: October 30, 2009

Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

Corresponding author: Won Yong Lee, MD, PhD, Department of Neurology, Samsung Medical Center, Sungkyunkwan University School of Medicine, 50 Irwon-dong, Gangnam-gu, Seoul 135-710, Korea, Tel +82-2-3410-3593, Fax +82-2-3410-0052, E-mail neurolwy@skku.edu
• Received: October 5, 2009   • Revised: November 3, 2009   • Accepted: November 4, 2009

Copyright © 2009 The Korean Movement Disorder Society

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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  • Background and Purpose:
    Oromandibular dyskinesia (OMD) can occur spontaneously or they can be induced by the conventional dopamine receptor antagonists. Anticholinergic medications have rarely been reported to cause OMD in parkinsonian or non-parkinsonian patients.
  • Methods:
    We analyzed the clinical features of two parkinsonian and one non-parkinsonian patients who experienced OMD after anticholinergic medication.
  • Results:
    Each patient of our cases developed oromandibular symptoms in the temporal regions that were related to the addition of anticholinergic agents, and the symptoms were relieved following the discontinuation of the causative anticholinergic drugs. In one of our case, levodopa alone did not cause dyskinesia but augmented dyskinesia associated with anticholinergics.
  • Conclusions:
    Here we report two parkinsonian and one non-parkinsonian patients with OMD induced by the use of anticholinergic agents. In our cases, we could not find any other precipitating or actual secondary causes for the OMD symptoms in our patients. Furthermore, the fact that the OMD in our cases were ameliorated with cessation of anticholinergics suggests that it may be anticholinergic-induced.
Oromandibular dyskinesia (OMD) occurs as involuntary, repetitive, stereotypical movements of the lips, tongue, and sometimes the jaw during the day.1 It occurs spontaneously or can be induced by medication.2 Most of the conventional dopamine receptor antagonists can cause OMD, and co-administration of anticholinergic agents is a recognized risk factor for tardive dyskinesia.3 Several authors described previously a few cases of orobuccal dyskinesias caused by administration of anticholinergic medications in patients with parkinsonism,47 and non-parkinsonian patients.4,5,8
Here we report the experience of patients with dyskinesia that was limited to the oromandibular area and was induced by the use of anticholinergic drugs and relieved by withdrawal of causative drugs.
Case 1
A 6-year-old boy was referred to our clinic due to episodes of tremor and rigidity a few days prior to his visit to our clinic. He was diagnosed with acute lymphocytic leukemia (ALL), and treated with bone marrow transplantation and chemotherapeutic agents, including cyclosporine, azathioprine, and prednisolone. On examination, he showed resting tremor, rigidity and bradykinesia in both extremities, cervical dystonia and choreiform movements of the upper extremities, but no dyskinesias in his facial area. His parkinsonism and choreic limb movements were thought to be caused by cyclosporine-induced leukoencephalopathy with hemorrhage involving the bilateral basal ganglia. We medicated with biperiden at a dose of 6 mg per day to manage his parkinsonism. Levodopa was not administered to him for his parkinsonism. Three months after beginning treatment with biperiden, he began to experience abnormal involuntary movement in his oromandibular area. We discontinued the causative anti-cholinergic drug, biperiden but kept the other drug at the same dose. OMD markedly improved four months after the discontinuation of anticholinergics.
Case 2
A 76-year-old woman visited our clinic due to involuntary movements in her orofacial area. She was diagnosed with Parkinson’s disease 2 years prior and treated with levodopa at a dose of 600 mg per day. Trihexyphenidyl (4 mg per day) was added to her treatment regimen due to aggravated hand tremor. Three months after starting trihexyphenidyl, she experiences orofacial dyskinesia. On examination, she showed OMD and parkinsonian symptoms (Hoehn and Yahr stage 2) without any other drug-related complications. We could not find other causes for the OMD symptoms including history of head or facial trauma or denture. In addition, she had not received any other drugs, commonly used and known to cause tardive dyskinesia. We discontinued the trihexyphenidyl but continued the other medication for the treatment of her parkinsonism. The OMD disappeared within 2 months and did not recur for 2 years.
Case 3
A 62-year-old man was referred to us due to involuntary movement of the oromandibular area. He suffered from forceful involuntary eye closing without orofacial movements, and was diagnosed with blepharospasm 2 years prior. He was treated with procyclidine at a dose of 10 mg per day. One year after administration of procyclidine, he complained of abnormal movements in his oromandibular area and occasionally crunched his lips. Because his abnormal movement was suggested to be a drug-induced OMD, we discontinued treatment with procyclidine. His OMD was markedly relieved 4 weeks after the discontinuation of procyclidine. His blepharospasm also improved following periorbital injection of botulinum toxin type A.
Each patient of our cases developed oromandibular symptoms in the temporal regions that were related to the addition of anticholinergic agents, and the symptoms were relieved following the discontinuation of the causative anticholinergic drugs.
Several parkinsonian patients including our two cases have been reported to develop OMD following the introduction of anticholinergic therapy regardless of co-administration of levodopa (Table 1).47 In the previous report, levodopa alone did not cause dyskinesia but augmented dyskinesia associated with anticholinergics.7 This finding was also observed in one of our cases. Relatively high frequency of anticholinergic-induced OMD in parkinsonian patients may be caused by the pre-existing imbalance between the activity of dopaminergic and cholinergic systems in the basal ganglia as well as alterations in striatal cholinergic neurons.9,10 Anticholinergic agents might diminish gamma-aminobutyric acid-ergic inhibition of dopaminergic nigral neurons and increase in endogenous striatal dopaminergic activity.9
OMD has also been observed following introduction of anticholinergic agents to non-parkinsonian patients including one of our cases (Table 2).4,5,8 It was recently suggested that anticholinergic agents increase the risk of tardive dyskinesia (TD) in patients treated with neuroleptic drugs.8 Unlike the patients in the previous report, the patients in the present study had never taken any neuroleptic drugs, which are known to affect the dopaminergic system.
Because of the relatively delayed onset (for patient 1 and 2, 3 months and for patient 3, 12 months after medication) of OMD in our cases, their OMD might be diagnosed as a TD. Because TD is traditionally used to describe abnormal movements developing after chronic exposure to dopamine receptor blocking agents, rather drug-induced OMD would be more appropriate for our cases. In addition, in contrast to other forms of TD, the OMD in our patients was markedly improved by the discontinuation of the causative drugs. The mechanism of TD was explained by the reduction of cholinergic neurons in specific subregions of the striatum and nucleus accumbens in a rodent model.11
The main concerns of our cases are that complete resolution had not been observed in all the cases and there was no re-challenge with the anti-cholinergic medications. However, we could not find any other precipitating or actual secondary causes for the OMD symptoms in our patients. Furthermore, the fact that the OMD in our cases were ameliorated with cessation of anticholinergics suggests that it may be anticholinergic-induced.
Table 1.
Reported cases of oromandibular dyskinesia induced by anticholinergic drugs in parkinsonian patients
Reference author Age/gender Diagnosis Anticholinergics (dose/day) Co-administered drug (dose/day) Onset of dyskinesia Time to improvement
Fahn and David4 76/M PD Trihexyphenidyl (NA) NA 3 days 2 days
Ethopropazine (NA)
76/F PD Trihexyphenidyl (NA) NA NA NA
Birket-Smith5 65/F PD Procyclidine (15–30 mg/d) None NA 7 days
Biperiden (12 mg/d) 5 days 6 days
72/F PD Biperiden (12 mg/d) None 42 days 42 days
Orphenadrine (150 mg/d) 7 days 56 days
71/F PD Biperiden (15–30 mg/d) None 93 days 28 days
Orphenadrine (150 mg/d)
74/F PD Biperiden (12 mg/d) None 14 days NA
Prophenamine (150 mg/d) 7 days 14 days
Warne, et al.6 73/M DIP Benzhexol (15 mg/d) NA 2 days 14 days
Benzhexol (15 mg/d) with ethopropazine (150 mg/d) NA 14 days
Hauser and Olanow7 60/M PD Trihexyphenidyl (4 mg/d) Levodopa (400 mg/d) 3 days 5 days
Our case 1 6/M Parkinsonism Biperiden (6 mg/d) None 3 months 4 months
Our case 2 76/F PD Trihexyphenidyl (4 mg/d) Levodopa (600 mg/d) 3 months 2 months

PD: Parkinson’s disease, DIP: drug-induced parkinsonism, NA: not available.

Table 2.
Reported cases of oromandibular dyskinesia induced by anticholinergic drugs in non-parkinsonian patients
Reference author Age/gender Diagnosis Anticholinergics (dose/day) Co-administered drug (dose/day) Onset of dyskinesia Time to improvement
Fahn and David4 78/F ET Trihexyphenidyl (NA) NA NA NA
66/M Depression Procyclidine (NA) NA 2 days NA
Birket-Smith5 63/F ET Benzhexol (4 mg/d) None 30 days 15 days
66/F Tremor Procyclidine (15 mg/d) None 42 days 30 days
Suzuki, et al.8 40/M TD Biperiden (3 mg/d) Risperidone (3–6 mg/d) 14 days 23 days
28/F TD Biperiden (6 mg/d) Risperidone (9 mg/d) 2 months 6 weeks
TD Biperiden (2–4 mg/d) Risperidone (2 mg/d) 2 months 6 weeks
Our case 3 62/M Blepharospasm Procyclidine (10 mg/d) None 12 months 4 weeks

ET: essential tremor, TD: tardive dyskinesia, NA: not available.

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