[Note: One trade name for the antidepressant pramipexole is Mirapex.]
Objective: Compulsivity has been associated with use of dopamine agonists used to treat Parkinson's disease (PD).
Increasing use of these agents to treat fibromyalgia (FM) raises concern for this unexpected toxicity in a new group of patients.
This is the first report of compulsive gambling and shopping among patients taking dopamine agonists for treatment of FM.
Design: A retrospective chart review of all patients in a large, active FM research practice was used to identify compulsivity associated with dopamine agonists and describe its remission following dug withdrawal.
Results: Of 3,006 patients with FM treated between 2002 and 2006, 1,356 had taken >/=1 dose of a dopamine agonist ( >95% pramipexole).
Twenty-one (3 male, 18 female) were identified with:
• Compulsive gambling (33%),
• Shopping (40%)
• Or both (27%) after taking a 4.5 mg mean dose of pramipexole at bedtime for 14.4 +/- 14.9 months.
Compulsivity resolved in 3-10 days for 19 of 21 patients and by 3 months for all following a monitored, compulsory tapered discontinuation over 7 days.
Conclusions: While biologic aspects of PD and FM differ considerably, compulsive gambling and shopping have become important, yet unexpected concerns related to use of dopamine agonists for patients with FM and their treating clinicians.
Source: Journal of Gambling Studies, Feb 25, 2009 [E-pub ahead of print] PMID: 19241148, Holman AJ. Pacific Rheumatology Research, Renton, Washington, USA. [E-mail: AJHSeattle@aol.com]