Mirapex vs. Sinemet for Parkinson's Disease: Important Differences and Potential Risks.

Key takeaways

Pramipexole (Mirapex, Mirapex ER) and Sinemet (carbidopa/levodopa) are both used to treat Parkinson's disease (PD), but they work differently. Pramipexole is a dopamine agonist that helps raise dopamine levels in the brain to improve mpvement problems, while Sinemet combines two medications - carbidopa and levodopa - to increase dopamine levels. Pramipexole is available in both immediate-release and extended-release forms, with the immediate-release needing to be taken three times a day and the extended-release once daily. Sinemet also comes in immediate-release and extended-release forms, but it generally needs to be taken multiple times per day regardless of the form.Pramipexole can cause side effects like extreme sleepiness, dizziness, and compulsive behaviors, while Sinemet can cause involuntary movements, dark-colored urine, and hallucinations. Both medications can make you very sleepy and should not be stopped suddenly without consulting your healthcare provider.

Pramipexole

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Carbidopa / levodopa

(Sinemet)

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Summary for Mirapex

Prescription only

Pramipexole is used to treat Parkinson's disease (PD) and restless legs syndrome (RLS). It's approved for adults and works as a dopamine agonist to help control movements. For PD, you can take the immediate-release tablets by mouth, usually 3 times a day. There's also an option to take the extended-release tablets just once a day. For RLS, only the immediate-release tablets are available. Side effects include nausea, drowsiness, and dizziness. Pramipexole is a generic medication. The brand name Mirapex is no longer available.

Indications for Mirapex

Parkinson's disease (PD)
Moderate-to-severe restless legs syndrome - immediate-release tablets only

Pros and Cons for Mirapex

Pros

Can help improve movement and shaking
Comes as immediate-release (3 times daily) and extended-release (once daily)

Cons

Can cause nausea and sleepiness
Have to slowly lower the dose to stop the medication to prevent possible withdrawal symptoms

Common Side Effects for Mirapex

Early Parkinson’s disease:

Nausea (28%)
Dizziness (25%)
Sleepiness (22%)
Trouble sleeping (17%)
Constipation (14%)
Weakness (14%)

Restless legs syndrome:

Nausea (16%)
Headache (16%)
Tiredness (9%)
Sleepiness (6%)
Constipation (4%)

Warnings for Mirapex

Sleepiness or falling asleep during activities
Low blood pressure when standing up
Trouble controlling impulsive behavior
Hallucinations and changes in behavior and thoughts
Trouble controlling body movements
Changes in your posture
Severe muscle damage (rhabdomyolysis)
Possible worsening of RLS symptoms
Withdrawal symptoms while lowering the dose or after stopping the medication

Summary for Sinemet

Prescription only

Carbidopa / levodopa (Sinemet) is a first-choice option for Parkinson's disease (PD) in adults. It's also used to treat adults with conditions that cause PD symptoms, like shakiness and slowed movement. This medication helps raise and keep dopamine levels high in the brain to help with movement. But it's usually taken multiple times per day to relieve PD symptoms. Immediate-release tablets are available as brand name Sinemet and generic. Extended-release tablets and orally disintegrating tablets are generic only. Side effects can include movement problems, nausea, and possible hallucinations.

Indications for Sinemet

Parkinson's disease (PD)
Parkinsonism (conditions that cause people to have PD symptoms, like slowness, stiffness, and tremors)

Pros and Cons for Sinemet

Pros

First-choice option for treating PD symptoms
Available in many forms: immediate-release (IR) tablets, extended-release (ER) tablets, and orally disintegrating tablets (ODTs)
Might work within 1 hour

Cons

Usually need to take many times per day to control PD symptoms
Can make you very sleepy and possibly fall asleep suddenly
Can darken the color of your saliva, sweat, and urine

Common Side Effects for Sinemet

Involuntary movements (dyskinesia or dystonia)
Nausea

Warnings for Sinemet

Sleepiness or falling asleep during activities
High fevers and confusion when lowering the dose or stopping too suddenly
Hallucinations and changes in behavior and thoughts
Difficulty controlling impulsive behavior
Risk of depression and thoughts of suicide
Low vitamin B6 levels and seizures
Caution use in people with a history of heart attack and arrhythmia
Caution use in people with a history of stomach ulcers
Higher eye pressure in people with glaucoma
Caution use in people with phenylketonuria (PKU) - orally disintegrating tablets only