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Monday, April 15, 2019

Medication-Induced Movement Disorders and Other Adverse Effects of Medication

By: SOPHIA F. DZIEGIELEWSKI

The medication-related conditions listed in DSM-5 are not considered mental disorders. The information presented, however, is important, as it may support the diagnostic assessment. Lacasse (2014) warns that placing a diagnosis of a mental disorder can create a pathway to treatment with psychiatric drugs.

Two important diagnostic areas most often associated with these medications are in schizophrenia spectrum disorders and use of neuroleptics and in the depressive disorders and discontinuance syndromes related to stopping antidepressant medications. The conditions listed here were previously covered in DSM-IV and DSM-IV-TR in a combined section, Other Disorders That May Be a Focus of Clinical Attention. In addition, when used with the previous multi-axial system, they were coded on Axis I.

These conditions were reorganized and placed in their own place to emphasize the conditionsprominence, and designating a separate attention for them clearly highlights the importance of recognizing medication effects and how the resulting presentation can affect and confuse the mental health diagnosis. The medication-related conditions listed here can lead to a temporary or permanent movement-based disorder or influence behavior because of the adverse effects being experienced.

The APA (2013) gives two primary reasons for including these in a separate article. The first is the helpful information these categories can provide in management and subsequent treatment of client problems. In these conditions, the medications are either the primary or secondary effect and clearly influence any subsequent diagnosis. The second reason is how helpful acknowledgment of these medication-related conditions can be for making the diagnostic impression. Recognizing these conditions can assist with the differential diagnosis and completing a more comprehensive and accurate diagnostic impression.

For example, a client suffering from an anxiety disorder may report feeling restless and fidgety. These types of symptoms may be consistent with extreme anxiety. If the symptoms alone are assessed without a good supporting history, the abnormal fidgety and rocking movementsrelationship to medication may be missed.

The medication-related condition most representative of these symptoms is neuroleptic-induced akathisia. Therefore, recognizing the etiology of symptoms can clarify what is medication related and what may be symptoms consistent with a mental disorder.

Several different categories are all termed neuroleptic-induced; the conditions in this area are medication related, and the types of medications are the neuroleptics. Because the term neuroleptic may be considered outdated in some of the literature, the reader is cautioned that often this term is used interchangeably with the term antipsychotics (APA, 2013).

Although explaining all the differences between the types of antipsychotic medication is beyond the scope of this article, it is important to distinguish between typical and atypical types. The newer medications in this category, referred to as atypical medications, may also have some serious side effects but fewer neuroleptic or movement-related symptoms, which are the focus of this article. (See Quick References 3.7 and 3.8).

Q Quick References 3.7 UICK REFERENCE 3.7

Typical Antipsychotic Medications*

Chlorpromazine (Thorazine) Thioridazine (Mellaril) Trifluoperazine (Stelazine)
Fluphenazine (Prolixin)
Haloperidol (Haldol)
Loxapine (Loxitane)
Thiothixene (Navane)
Fluphenazine (Prolixin) Haloperidol (Haldol) Loxapine (Loxitane) Thiothixene (Navane)

Side Effect Profiles and Parkinsonian Symptoms Include:

DystoniaAcute contractions of the tongue (stiff or thick tongue) AkathisiaMost common form of extrapyramidal symptoms (e.g., inner restlessness)
*Generic medications listed first.


QU Quick References 3.8 ICK REFERENCE 3.8

Selected Atypical Medications*

Clozapine (Clozaril)
Risperidone (Risperdal)
Olanzapine (Zyprexa)
Quetiapine (Seroquel)
Ziprasidone (Geodon)
Aripiprazole (Abilify)
Pimozide (Orap)

Selected Side Effects Include:

Weight gain
Diabetes
*Generic medications listed first.

Medications often referred to as traditional or neuroleptic antipsychotic medications are dopamine inhibitors that block other neurotransmitters, including acetylcholine, histamine, and norepinephrine. For example, this article describes medication-induced acute dystonia and medication-induced acute akathisia; both conditions are related to medications used to treat extrapyramidal symptoms. These problematic symptoms may develop a few days after starting a medication or increasing or decreasing the dosage of a medication. The term extrapyramidal symptoms (EPS) describes a side effect profile that affects a clients motor movements and can accompany use of the neuroleptic medications.

Dystonia, which is characterized by sudden and painful muscle stiffness, may present in clients as grimacing, difficulty with speech or swallowing, oculogyric crisis (upward rotation of the eyeballs), muscle spasms of the neck and throat, and extensor rigidity of the back muscles (Carpenter, Conley, & Buchanan, 1998). Clients may also complain of a thick or stiff tongue that impairs their ability to speak. These reactions often occur within the first few days of treatment.

Another symptom is akathisia, which is often considered less obvious than dystonia, although it is the most common form of EPS. Akathisia is an extreme form of motor restlessness that may be mistaken for agitation (National Alliance on Mental Illness [NAMI], 2003). The individual feels compelled to constantly move, and many times clients report an inner restlessness evidenced by a shaking leg or constant pacing. During assessment, these clients cannot sit still, and the restlessness in their legs can result in uncontrollable foot tapping. Although akathisia generally appears early in the course of treatment and can be related to other EPS, it can also occur independently (Carpenter et al., 1998).

Another form of EPS which results from long-term treatment with older antipsychotic medications, is tardive dyskinesia (TD). This condition involves pronounced involuntary movements of any group of muscles, most commonly the mouth and tongue (NIMH, 2009).This syndrome generally occurs with elderly individuals, especially women. Prolonged use of these medications can also result from movement-related symptoms characteristic of dystonia and akathisia referred to as tardive dystonia and tardive akathisia.

A less frequent side effect associated with the older or traditional antipsychotic medications is
neuroleptic malignant syndrome (NMS). Recognizing this syndrome can be difficult. It often includes serious medical complications and illness (pneumonia, etc.) and untreated or unrecognized symptoms related to the EPS mentioned earlier (PDR, 2013). Benzer (2007) reported that although NMS occurs in only 0.1% to 0.04% of cases, one of four cases of NMS can end in death. This condition is typically more common in males.  Symptoms of NMS include severe rigidity of the muscles, high fever, confusion, pallor, sweating, and rapid heart rate. One early sign of the condition is high blood pressure. Once a client has been assessed with NMS, any further drug treatment must always be monitored closely by a medically trained professional.

The last conditions to be coded are the other medication-induced movement disorders. In this classification, like the other groups, the movement disorders are related to medications. These problematic medication-influenced movements, however, are caused by medications other than the neuroleptics.

Another category in this section is antidepressant discontinuation syndrome, the set of symptoms that occur after an antidepressant medication has been taken for at least a month and then reduced or discontinued. In this condition, the discontinuation of these medications can result in a multitude of symptoms that were not present before the medication was taken initially, including a variety of somatic symptoms such as nausea and hypersensitivity to noise and light. (See Quick Reference 3.9.)

QU Quick Reference 3.9.)ICK REFERENCE 3.9

Medication-Induced Movement Disorders

Neuroleptic-Induced Parkinsonism
Other Medication-Induced Parkinsonism

Neuroleptic Malignant Syndrome
Medication-Induced Acute Dystonia
Medication-Induced Acute Akathisia
Tardive Dystonia
Tardive Akathisia
Medication-Induced Postural Tremor
Other Medication-Induced Movement Disorder
Antidepressant Discontinuance Syndrome

References

SOPHIA F. DZIEGIELEWSK, 2015, DSM-5TM in Action, by John Wiley & Sons, Inc.

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