I had never heard of this before. Apparently this drug that treats Restless Leg Syndrome can turn you into a compulsive gambler.

Update: Litigation Involving Mirapex and Its Link with Compulsive Gambling Disorders
February 15, 2007
If you or someone you know have been prescribed Mirapex and have developed a compulsive gambling addiction, and you wish to consult with us, please send us an e-mail or call us at 1-800-553-9910.
Robins, Kaplan, Miller & Ciresi L.L.P. has filed over 58 Mirapex gambling lawsuits in federal court on behalf of clients who developed a compulsive gambling disorder while on Mirapex and are currently involved in the discovery phase of the litigation, including reviewing many internal documents of the Mirapex manufacturers. A trial ready date has been set by the court. We represent many people who have been negatively affected by Mirapex, and we continue to investigate individual cases and to file meritorious cases in court. Our lawyers will evaluate your case for free and at no cost to you. If you or someone you know have been prescribed Mirapex and have developed a compulsive gambling addiction, and you wish to consult with us, please send us an e-mail by clicking on this link: contact us.
Mirapex Gambling and Other Compulsive Behaviors
According to a study by Mayo Clinic doctors released in July 2005, the drug Mirapex may cause compulsive gambling addictions.1 The Mayo study builds upon earlier research which suggested a link between dopamine agonist drugs, like Mirapex, and a range of compulsive behaviors, such as compulsive gambling. For example, a study published in 2003 by researchers at the Muhammad Ali Parkinson Research Center at the Barrow Neurological Institute in Arizona found increased pathological gambling in those being treated with high-dose dopamine agonist therapy, and in particular with Mirapex.2 The lead author of the Mayo Clinic study has explained that when a patient develops the Mirapex side effects of compulsive behaviors but then stops using Mirapex, the results are very dramatic “like a light switch being turned off when they stopped the drug.”3
Expanding on the Mayo Clinic study, three doctors associated with the FDA and one associated with Duke University reviewed the FDA’s Adverse Event Reporting System, which contained 39 reports of Mirapex users with pathological gambling addiction as of March 2005. In the February 2006 Archives of Neurology, Dr. Ana Szarfman and her colleagues noted that this incidence of gambling is “380 times greater than expected.” 4
Most recently, Mayo Clinic doctors published another study in January 2007 about additional patients who developed pathological gambling while been treated with Mirapex for Restless Legs Syndrome (RLS).5 These Mayo doctors concluded that the close time relationship between their patients’ use of dopamine agonist drugs like Mirapex and their gambling behavior suggested that these drugs caused the gambling problems.
February 15, 2007
If you or someone you know have been prescribed Mirapex and have developed a compulsive gambling addiction, and you wish to consult with us, please send us an e-mail or call us at 1-800-553-9910.
Robins, Kaplan, Miller & Ciresi L.L.P. has filed over 58 Mirapex gambling lawsuits in federal court on behalf of clients who developed a compulsive gambling disorder while on Mirapex and are currently involved in the discovery phase of the litigation, including reviewing many internal documents of the Mirapex manufacturers. A trial ready date has been set by the court. We represent many people who have been negatively affected by Mirapex, and we continue to investigate individual cases and to file meritorious cases in court. Our lawyers will evaluate your case for free and at no cost to you. If you or someone you know have been prescribed Mirapex and have developed a compulsive gambling addiction, and you wish to consult with us, please send us an e-mail by clicking on this link: contact us.
Mirapex Gambling and Other Compulsive Behaviors
According to a study by Mayo Clinic doctors released in July 2005, the drug Mirapex may cause compulsive gambling addictions.1 The Mayo study builds upon earlier research which suggested a link between dopamine agonist drugs, like Mirapex, and a range of compulsive behaviors, such as compulsive gambling. For example, a study published in 2003 by researchers at the Muhammad Ali Parkinson Research Center at the Barrow Neurological Institute in Arizona found increased pathological gambling in those being treated with high-dose dopamine agonist therapy, and in particular with Mirapex.2 The lead author of the Mayo Clinic study has explained that when a patient develops the Mirapex side effects of compulsive behaviors but then stops using Mirapex, the results are very dramatic “like a light switch being turned off when they stopped the drug.”3
Expanding on the Mayo Clinic study, three doctors associated with the FDA and one associated with Duke University reviewed the FDA’s Adverse Event Reporting System, which contained 39 reports of Mirapex users with pathological gambling addiction as of March 2005. In the February 2006 Archives of Neurology, Dr. Ana Szarfman and her colleagues noted that this incidence of gambling is “380 times greater than expected.” 4
Most recently, Mayo Clinic doctors published another study in January 2007 about additional patients who developed pathological gambling while been treated with Mirapex for Restless Legs Syndrome (RLS).5 These Mayo doctors concluded that the close time relationship between their patients’ use of dopamine agonist drugs like Mirapex and their gambling behavior suggested that these drugs caused the gambling problems.