Compare entacapone vs. carbidopa / levodopa extended release

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Treats Parkinson's disease.

Comtan (entacapone) enhances the effect of carbidopa/levodopa. It's usually added on when carbidopa/levodopa starts to lose its effect on Parkinson's disease.

Treats Parkinson's disease.

Sinemet CR (carbidopa / levodopa extended release) is the first choice treatment for Parkinson's disease.

Upsides
  • Allows you to get more out of carbidopa/levodopa, especially in later stages of Parkinson's disease.
  • Comtan (entacapone) is available in a single pill combination with carbidopa/levodopa.
  • Sinemet CR (carbidopa / levodopa extended release) is released over a long period of time in your body and can allow you to take fewer pills less frequently.
Downsides
  • Must be taken with other medicines for Parkinson's disease
  • Can make you lightheaded especially if you suddenly stand up from sitting or lying down.
  • Can make you very sleepy
  • May require frequent adjustments before finding the dose that works best for you
  • Sinemet CR (carbidopa / levodopa extended release) can make you very sleepy. Don't drive or do anything that requires concentration until you know how your body reacts to it.
  • Your saliva, sweat and urine may have dark color and stain your clothing while taking Sinemet CR (carbidopa / levodopa extended release).
  • Sinemet CR (carbidopa / levodopa extended release) will lose its effect over time. If you notice it wearing off sooner than you'd like, talk to your doctor.
  • Sinemet CR (carbidopa / levodopa extended release) may cause unusual cravings in some people.
Used for
Dosage forms
  • Pill
  • Extended release
Price
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Reviews
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Side effects
21possible side effects
  • Difficulty controlling movements
    25%
  • Nausea
    14%
  • Muscle spasm
    10%
  • Changes in urine color
    10%
  • Diarrhea
    10%
  • Muscle rigidity
    9%
  • Dizziness
    8%
  • Abdominal pain
    8%
  • Fatigue
    6%
  • Constipation
    6%
  • Vomiting
    4%
  • Dry mouth
    3%
  • Shortness of breath
    3%
  • Purple spots on the skin
    3%
  • Increased sweating
    2%
  • Back pain
    2%
  • Anxiety
    2%
  • Sleepiness
    2%
  • Indigestion
    2%
  • Flatulence
    2%
  • Weakness
    2%
See more detailed side effects
15possible side effects
  • Difficulty controlling movements
    17%
  • Nausea
    6%
  • Hallucinations
    4%
  • Confusion
    4%
  • Dizziness
    3%
  • Depression
    2%
  • Urinary tract infection
    2%
  • Headache
    2%
  • Unusual dreams
    2%
  • Muscle spasms
    2%
  • Vomiting
    2%
  • Upper respiratory infection
    2%
  • Shortness of breath
    2%
  • Periods of immobility
    2%
  • Back pain
    2%
See more detailed side effects
Risks and risk factors
  • Falling asleep during the day
    • Taking other medicines for Parkinson's
  • Changes in behavior
  • Low blood pressure and fainting
    • Low blood pressure
    • Taking medicines for high blood pressure
  • Lack of impulse control
    • Taking other medicines for Parkinson's disease
  • Diarrhea
  • Difficulty controlling movements
See more detailed risks and warnings
  • Falling asleep during the day
    • Taking other medicines for Parkinson's
  • High fever and confusion
    • Stopping Sinemet CR (carbidopa / levodopa extended release) suddenly
  • Changes in behavior
  • Lack of impulse control
    • Taking other medicines for Parkinson's disease
  • Changes in blood pressure and falls
See more detailed risks and warnings