ISSUE: FDA notified healthcare profesionals about a possible increased risk of heart failure with Mirapex (pramipexole). Results of recent studies suggest a potential risk of heart failure that needs further review of available data. Because of the study limitations, FDA is not able to determine whether Mirapex increases the risk of heart failure. FDA is continuing to work with the manufacturer to clarify further the risk of heart failure with Mirapex and will update the public when more information is available.
FDA evaluated a pooled analysis of randomized clinical trials and found that heart failure was more frequent with Mirapex than with placebo; however, these results were not statistically significant. FDA also evaluated two epidemiologic studies that suggested an increased risk of new onset of heart failure with Mirapex use. However, study limitations make it difficult to determine whether excess heart failure was related to Mirapex use or other influencing factors (see FDA Drug Safety Communication Data Summary for a detailed discussion of the studies).
BACKGROUND: Mirapex (pramipexole) is a prescription medicine used to treat the signs and symptoms of Parkinson's disease and moderate to severe symptoms of primary restless legs syndrome, in a class of medicines called dopamine agonists.
RECOMMENDATION: At this time, FDA has not concluded that Mirapex increases the risk of heart failure. Healthcare professionals should continue to follow the recommendations in the drug label when prescribing Mirapex. Patients should continue to take their Mirapex as directed and should contact their health care professional if they have any questions or concerns.
Healthcare professionals and patients are encouraged to report adverse events or side effects related to the use of these products to the FDA's MedWatch Safety Information and Adverse Event Reporting Program:
[09/19/2012 - Drug Safety Communication - FDA]