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Common drugs taken by thousands of patients battling Parkinson’s may turn them into compulsive gamblers, research warns.

New evidence has uncovered a link between dopamine agonists and problems with controlling irresistible urges.

Binge eating, frequent shopping and compulsive sexual behaviours were also listed as possible compulsive effects of the Parkinson’s drugs.

French researchers believe more than half of patients taking the drugs to combat their condition may succumb to impulse control disorders. 

About 127,000 people in the UK have Parkinson’s, while figures suggest there are around one million sufferers in the US.

Dopamine, a chemical in the brain that regulates movement, is gradually reduced in patients with the progressive neurological condition.

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It can be treated with levodopa, which converts to dopamine in the brain, or with dopamine agonists, which work by activating dopamine receptors. 

Researchers at the Sorbonne University in Paris studied 411 patients who had been diagnosed with Parkinson’s to make the conclusion.





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Volunteers were followed for an average of three years and were quizzed about impulse control disorders, such as compulsive shopping.

A staggering difference was noted in the rates of compulsive behaviour between patients who had taken the drugs and those who hadn’t.

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For those who had never used the drugs, 12 per cent had gone on to struggle with the disorders – compared to 52 per cent in the other group. 

The researchers also uncovered the risk of impulse control disorders was greater for those on higher doses of dopamine agonists. 

The drugs pramipexole and ropinirole were the two medications associated with the highest risk of developing the disorders.

A total of 30 people with impulse control disorders who stopped taking dopamine agonists were also followed during the study. 

The disorders gradually stopped over time, with half of the people no longer having issues after a year, the researchers noted.

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Dr Jean-Christophe Corvol, study author, published the findings of the trial in the journal Neurology.

He said: ‘Our study suggests that impulse control disorders are even more common than we thought in people who take dopamine agonists.

‘These disorders can lead to serious financial, legal and social and psychological problems.’ 

Related: 16 warning signs of Parkinson’s disease (provided by Espresso)




16 warning signs of Parkinson's disease: This disorder of the central nervous system is one of the world’s most visible afflictions, and not just because it affects famous folks like Michael J. Fox and the late Muhammad Ali. For one thing, symptoms hinder both fine and gross motor skills, and are therefore very pronounced (as this list clearly shows). For another, people diagnosed with PD often live with it for years or even decades as it becomes steadily more debilitating. Last but certainly not least, millions of people around the world suffer from it. No age group or race is immune from its effects, which are often detectable decades before diagnosis. For that reason, the early warning signs listed here should prompt a visit to the doctor.



16 warning signs of Parkinson’s disease

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