Compare entacapone vs. carbidopa / levodopa

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

Comtan (entacapone)

Prescription only
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 (carbidopa / levodopa) 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 (carbidopa / levodopa) is widely available as a regular pill, a quick dissolving pill or a liquid taken through a feeding tube.
  • Sinemet (carbidopa / levodopa) is available in generic.
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
  • Can make you very sleepy.
  • Can stain your saliva, sweat and urine a dark color.
  • Will lose its effect over time as your disease progresses.
  • May need to be taken several times during day to control symptoms of Parkinson's disease
  • May cause unusual cravings in some people.
Used for
Dosage forms
  • Pill
  • Pill
  • Dissolving tablet
Price
Lowest price near you
$122.9
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Lowest price near you
$18.44
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Reviews
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Side effects
10possible 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%
See more detailed side effects
The Sinemet (carbidopa / levodopa) FDA package insert doesn’t have numbers about how common side effects are.
Risks and warnings
  • Falling asleep during the day

    Taking other medicines for Parkinson's

  • Low blood pressure and fainting

    Low blood pressure

    ...and 1 more risk factors

  • Lack of impulse control

    Taking other medicines for Parkinson's disease

See more detailed risks and warnings
  • Falling asleep during the day

    Taking other medicines for Parkinson's

  • High fever and confusion

    Stopping Sinemet (carbidopa / levodopa) suddenly

  • Lack of impulse control

    Taking other medicines for Parkinson's disease

See more detailed risks and warnings