Sinemet (Carbidopa/Levodopa)

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Sinemet Brand
Dosage Quantity & Price
Carbidopa/Levodopa (Generic alternate to Sinemet) Generic
Dosage Quantity & Price
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Table of contents:

Sinemet is a prescription drug used to treat the symptoms of Parkinson's disease. It is a combination of two medications, levodopa, and carbidopa, which work together to restore the balance of key chemicals in the brain, allowing it to properly control body movements.

Sinemet contains two active ingredients, carbidopa, and levodopa. Levodopa helps the body produce dopamine, which is needed to control movement. Carbidopa is used to prevent levodopa from breaking down before it reaches the brain, where it is needed to alleviate Parkinson's symptoms.

Sinemet can be indicated to treat Parkinson-like symptoms such as muscle stiffness, shakiness, and difficulty moving. It is indicated in these conditions to permit the administration of lower doses of levodopa with reduced nausea and vomiting, with more rapid dosage titration, with a somewhat smoother response, and with supplemental pyridoxine.

Uses and Dosage

Sinemet is available in tablet form and is taken by mouth with or without food as directed by a healthcare provider, typically 3 to 4 times a day. It may be beneficial to take Sinemet with food to minimize nausea, but a high-protein diet should be avoided as it can reduce the amount of levodopa absorbed by the body, unless directed otherwise by a doctor. To ensure that Sinemet is absorbed properly, take it at least a few hours apart from any iron supplements or products containing iron, such as multivitamins with minerals. Patients should consult with their doctor or pharmacist for more information about taking Sinemet, including any possible drug interactions and specifically tailored instructions for their medication regimen.

The recommended starting dosage of Sinemet is typically one tablet of 25 mg carbidopa / 100 mg levodopa, taken three times per day. Dosage may be increased by up to 1 whole tablet per day or every other day, as needed, to a maximum dosage of 8 tablets per day. The dosage should be adjusted by a healthcare professional as needed and based on individual patient factors. It is also worth noting that the maximum daily recommended dose of carbidopa is 200 mg.

Side Effects

Common Side Effects of Sinemet (Carbidopa/Levodopa):

  • Common cold
  • Confusion
  • Depression
  • Dizziness
  • Headache
  • Unusual dreams
  • Vomiting

Serious Side Effects of Sinemet (Carbidopa/Levodopa):

  • Compulsive behaviors (behaviors that you cannot resist or control). Symptoms can include:
    • binge eating (periods when you eat large amounts of food)
    • gambling
  • Melanoma (a type of skin cancer). Symptoms can include:
    • a mole that’s growing in size or bleeding, or has changed color
    • itchiness
  • Feeling very tired or falling asleep during daily activities. Symptoms can include:
    • drowsiness while driving
    • falling asleep while talking
  • Allergic reaction.
  • Depression.
  • Dyskinesia (abnormal, involuntary movements).
  • Hallucinations (hearing or seeing things that are not real).
  • Shortness of breath
  • Urinary tract infection (UTI)
  • Dark-colored saliva, sweat, or urine

Form and Strength

Sinemet (Carbidopa/Levodopa) is available in the following forms and strengths:

Sinemet - Regular Release Tablet

  • 25/100 mg
  • 25/250 mg

Carbidopa/Levodopa: Regular Release Tablet

  • 10/100 mg
  • 25/100 mg
  • 25/250 mg


  • Caution should be exercised when taking Sinemet with other medications, as this could increase the risk of certain side effects or interactions. Be sure to inform your doctor of any other medications you are taking before starting treatment with Sinemet.
  • In some cases, Sinemet can cause low blood pressure, especially when standing up from a sitting or lying position. This can lead to dizziness or fainting. To minimize the risk of this happening, try to stand up slowly and rest for a few moments before walking.
  • Sinemet can also cause drowsiness or impair your ability to drive or operate heavy machinery. Avoid these activities until you know how Sinemet affects you.
  • Sinemet can cause changes in mood or behavior. If you notice any changes in your mood or behavior, or if you have thoughts of self-harm or suicide, contact your doctor immediately for further evaluation and treatment.
  • Caution should be exercised when taking Sinemet with other medications, as this could increase the risk of certain side effects or interactions. Be sure to inform your doctor of any other medications you are taking before starting treatment with Sinemet.
  • Sinemet is not generally recommended for use in children, as there is limited data available on its safety and effectiveness in this population.

Frequently Asked Questions (FAQ)

How long does it take Sinemet (carbidopa / levodopa) to work?

Sinemet starts working quickly and can provide relief of Parkinson's symptoms within 30 to 60 minutes after taking it.

Is Sinemet safe for everyone to use?

Sinemet may not be safe for everyone to use. Discuss all potential risks and benefits with your doctor before starting any new medication.

Can Sinemet be used in combination with other medications?

Yes, Sinemet can be used in combination with other medications for Parkinson's disease. However, talk to a doctor about all the medications you are taking, as some medications may interact with Sinemet.

Can Sinemet be used in pregnancy?

There is limited data available on the safety of Sinemet use in pregnancy. Women who are pregnant or planning to become pregnant should talk to their doctor before taking Sinemet.


It's important to purchase Sinemet from verified Canadian pharmacy.

Additional information

Generic name:



Regular Release Tablet, Scored Tablet, Tablet


10/100mg, 25/100mg, 25/250mg

Quantities Available:

100, 200