Trazodone's Link to Tardive Dyskinesia: Causes, Symptoms & Treatment

Understanding Tardive Dyskinesia

Tardive dyskinesia is a disorder characterized by involuntary and repetitive body movements, often of the face such as grimacing, tongue protrusion, puckering and smacking of lips, or blinking. These symptoms are caused by long-term use of certain medications such as antipsychotics or antidepressants. Tardive dyskinesia is most commonly seen in people who have been using antipsychotic medications for mental illnesses like schizophrenia or bipolar disorder.

What Causes Tardive Dyskinesia?

The exact cause of tardive dyskinesia is unknown, but it is believed to occur due to prolonged dopamine receptor blockade in the brain. Antipsychotic and antidepressant medications work by blocking dopamine receptors, which can change chemical signaling over time. Eventually this disrupted signaling causes abnormal and involuntary movements to emerge.

The longer a person is exposed to these dopamine-blocking medications, the higher their risk of developing tardive dyskinesia. However, it can develop after even a few months on the medication in some people. Older people also seem to be the most vulnerable to developing this disorder.

Risk Factors for Tardive Dyskinesia

There are several risk factors that can increase a person's likelihood of getting tardive dyskinesia:

• Taking antipsychotic medications, especially first-generation drugs like haloperidol, for long periods of time
• Being an older adult
• Having diabetes
• Taking medications that interact with antipsychotics, like antidepressants or drugs for Parkinson's symptoms
• Having mood disorders like depression or impulse control issues

Trazodone and Tardive Dyskinesia Risk

Trazodone is an antidepressant drug that is sometimes used off-label to treat insomnia. Like other antidepressants and antipsychotics, it affects signaling of key neurotransmitters like serotonin and dopamine in the brain.

Does Trazodone Cause Tardive Dyskinesia?

There have been a handful of case reports of tardive dyskinesia occurring in patients taking trazodone. However, this side effect appears to be very rare compared to traditional antipsychotic medications. In an analysis of over 100,000 patients taking antidepressants, the risk of tardive dyskinesia with trazodone specifically was extremely low.

If trazodone is causing tardive dyskinesia symptoms, they would likely emerge after taking it regularly for 6 months or longer. Those at highest risk with this medication would be elderly patients who are taking interacting drugs like antipsychotics.

Lowering TD Risk with Trazodone

While trazodone is an unlikely culprit for causing tardive dyskinesia, it is still smart for patients and doctors to be aware of this potential risk. There are a few things that can be done to lower the odds of trazodone causing persistent abnormal movements:

• Use the lowest effective dosage
• Take occasional breaks from using the medication under doctor supervision
• Closely monitor symptoms in elderly patients
• Avoid combining trazodone with antipsychotic or Parkinson's drugs

Diagnosing Tardive Dyskinesia

Getting an accurate diagnosis of tardive dyskinesia usually begins with giving your doctor a full account of your symptoms and their timeline, as well as all current medications you are taking. Bringing video footage of the abnormal movements to your appointment can also be very helpful for diagnosis.

Physical Exam and Patient History

If symptoms sound consistent with tardive dyskinesia, the next step will be a full neurological exam to check muscle tone, coordination, eye movements, and examine the abnormal movements. Your doctor will also take a very thorough history of all prescription medications you have ever taken to look for causes.

Assessing Symptom Severity

To determine the right course of treatment, your doctor will evaluate the severity of your tardive dyskinesia symptoms using assessment tools like:

• The Extrapyramidal Symptom Rating Scale (ESRS)
• The Abnormal Involuntary Movement Scale (AIMS)

This scoring helps categorize your symptoms as mild, moderate, or severe tardive dyskinesia.

Additional Testing

In some cases, blood tests may be ordered to check for nutritional deficiencies or markers of heavy metal toxicity. Brain imaging like CT scans or MRIs are also sometimes performed to rule out stroke or structural abnormalities causing similar symptoms.

Treating Tardive Dyskinesia from Trazodone

Stopping the Offending Drug

The first step in treating tardive dyskinesia is to stop the antipsychotic, antidepressant, or other culprit medication that is believed to be causing the abnormal movements. This may reverse symptoms, especially if caught in earlier stages. However, it can take many months for dopamine receptors to return to normal functioning.

Adding TD Medications

If stopping trazodone does not fully resolve symptoms, the next step is adding a medication specifically for tardive dyskinesia treatment. The FDA has approved VALBENAZINE (Ingrezza) and DEUTETRABENAZINE (Austedo) in recent years to reduce TD symptoms.

These drugs work by selectively targeting and calming overactive dopamine receptors. In studies, both Valbenazine and Deutetrabenazine rapidly improved tardive dyskinesia symptoms compared to placebo, with mild side effects.

Lifestyle Changes

Making certain lifestyle modifications can also help minimize symptoms while treating the underlying cause of tardive dyskinesia:

• Get more restful sleep
• Exercise regularly
• Reduce stress through yoga, meditation, etc.
• Avoid alcohol and tobacco
• Consume antioxidants like vitamin E and vitamin C

With the right treatment plan tailored to the individual, many people with tardive dyskinesia can find significant relief from their symptoms and improve quality of life.

Disclaimer: This article is for informational purposes only and does not constitute medical advice. Always consult with a healthcare professional before starting any new treatment regimen.