Parkinson's Meds May Raise Impulsive Behavior Risk

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Medications for Parkinson's May Raise Risk for Impulsive Behaviors
Medications for Parkinson's May Raise Risk for Impulsive Behaviors

HealthDay News -- Medications commonly used to treat Parkinson's disease may raise the risk of impulse control disorders such as compulsive gambling, compulsive shopping, and/or hypersexuality, according to a new review published online in JAMA Internal Medicine.

To explore any risk for the development of impulse control issues, the study authors analyzed FDA data on 2.7 million domestic and foreign adverse drug events reported between 2003 and 2012. Of these, 1,580 events were specifically identified as involving what investigators categorized as "serious" impulse control scenarios, with about half involving American patients. The remaining cases involved patients in 21 other countries.

The study authors found that nearly 45% of these events (n=710) were linked directly to the use of any of six different dopamine receptor agonist medications, and most involved male patients (more than 65%) with an average age of 55 years. The other 55% of cases were associated with the use of other medications.

More than 60% of the time, the impulse control cases involving dopamine receptor agonists involved patients with Parkinson's, whereas nearly a quarter involved patients with restless leg syndrome. Breaking it down, the team identified 628 instances of pathological gambling, 465 cases of hypersexuality, and 202 examples of compulsive shopping.

"What we have here is a striking example of a major problem in drug safety," study researcher Thomas Moore, a senior scientist with the Institute of Safe Medication Practices and a lecturer in epidemiology and biostatistics at George Washington University in Washington, DC, told HealthDay. "And that is the issue of how drugs can sometimes provoke psychiatric side effects that actually make people behave in extremely destructive and abnormal ways."


Moore TJ, et al. JAMA Intern Med. 2014; doi:10.1001/jamainternmed.2014.5262

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