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Drug interactions between Extendryl JR and prednisone

Results for the following 2 drugs:
Extendryl JR (chlorpheniramine/methscopolamine/phenylephrine)

Interactions between your drugs

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

Extendryl JR

A total of 467 drugs are known to interact with Extendryl JR.


A total of 452 drugs are known to interact with prednisone.

Drug and food interactions


chlorpheniramine food

Applies to: Extendryl JR (chlorpheniramine / methscopolamine / phenylephrine)

Alcohol can increase the nervous system side effects of chlorpheniramine 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 chlorpheniramine. Do not use more than the recommended dose of chlorpheniramine, and avoid activities requiring mental alertness such as driving or operating hazardous machinery until you know how the medication affects you. Talk to your doctor or pharmacist if you have any questions or concerns.

Switch to professional interaction data

Therapeutic duplication warnings

No warnings were found for your selected drugs.

Therapeutic duplication warnings are only returned when drugs within the same group exceed the recommended therapeutic duplication maximum.

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
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 interaction information available.

Further information

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