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Drug interactions between Duopa and Rytary

Results for the following 2 drugs:
Duopa (carbidopa/levodopa)
Rytary (carbidopa/levodopa)

Interactions between your drugs

There were no interactions found in our database between Duopa and Rytary - however, this does not necessarily mean no interactions exist. Always consult with your doctor or pharmacist.


A total of 753 drugs are known to interact with Duopa.


A total of 753 drugs are known to interact with Rytary.

Drug and food interactions


levodopa food

Applies to: Duopa (carbidopa / levodopa) and Rytary (carbidopa / levodopa)

Alcohol can increase the nervous system side effects of levodopa such as dizziness, drowsiness, and difficulty concentrating. Some people may also experience impairment in thinking and judgment. You should avoid or limit the use of alcohol while being treated with levodopa. You may experience reduced effectiveness of levodopa in the presence of foods or enteral (tube) feedings with a high protein content. This may make the symptoms of Parkinson's disease worse. Talk with your doctor or nutrition counselor about the best foods to eat while you are taking this medication. Contact your doctor if your condition changes.

Switch to professional interaction data

Therapeutic duplication warnings

Therapeutic duplication is the use of more than one medicine from the same drug category or therapeutic class to treat the same condition. This can be intentional in cases where drugs with similar actions are used together for demonstrated therapeutic benefit. It can also be unintentional in cases where a patient has been treated by more than one doctor, or had prescriptions filled at more than one pharmacy, and can have potentially adverse consequences.


Dopaminergic agents for parkinsonism

Therapeutic duplication

The recommended maximum number of medicines in the 'dopaminergic agents for parkinsonism' category to be taken concurrently is usually one. Your list includes two medicines belonging to the 'dopaminergic agents for parkinsonism' category:

  • Duopa (carbidopa/levodopa)
  • Rytary (carbidopa/levodopa)

Note: The benefits of taking this combination of medicines may outweigh any risks associated with therapeutic duplication. This information does not take the place of talking to your doctor. Always check with your healthcare provider to determine if any adjustments to your medications are needed.

Drug Interaction Classification

The classifications below are a guideline only. The relevance of a particular drug interaction to a specific patient is difficult to determine using this tool alone given the large number of variables that may apply.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No information available.

Do not stop taking any medications without consulting your healthcare provider.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.