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Table of Contents > Supplements > Phenylalanine > Interactions
Possible Interactions with: Phenylalanine

If you are currently being treated with any of the following medications, you should not use phenylalanine without first talking to your healthcare provider.

Antidepressant Medications, Monoamine Oxidase Inhibitors (MAOIs)
Phenylalanine may cause a severe increase in blood pressure in people taking MAOIs (such as phenelzine, tranylcypromine, pargyline, and selegiline). This severe increase in blood pressure (also called "hypertensive crisis") can lead to a heart attack or stroke. For this reason, individuals taking MAOIs should avoid foods and supplements containing phenylalanine.

Baclofen
The absorption of baclofen, a medication used to relieve muscle spasms, may be reduced by phenylalanine. Therefore, it is best to avoid taking this medication with a meal, especially one that is high in protein content, or with phenylalanine supplements.

Levodopa
A few case reports suggest that phenylalanine may reduce the effectiveness of levodopa, a medication used to treat Parkinson's disease. Some researchers speculate that phenylalanine may interfere with the absorption of this medication. Therefore, phenylalanine should not be taken at the same time as levodopa.


Drug Interactions
Baclofen
Levodopa-containing Medications

Copyright © 2004 A.D.A.M., Inc

The publisher does not accept any responsibility for the accuracy of the information or the consequences arising from the application, use, or misuse of any of the information contained herein, including any injury and/or damage to any person or property as a matter of product liability, negligence, or otherwise. No warranty, expressed or implied, is made in regard to the contents of this material. No claims or endorsements are made for any drugs or compounds currently marketed or in investigative use. This material is not intended as a guide to self-medication. The reader is advised to discuss the information provided here with a doctor, pharmacist, nurse, or other authorized healthcare practitioner and to check product information (including package inserts) regarding dosage, precautions, warnings, interactions, and contraindications before administering any drug, herb, or supplement discussed herein.

 
RELATED INFORMATION
Phenylalanine
  Uses of this Supplement
Depression
Parkinson's Disease
  Supplements with Similar Uses
View List by Use
  Drugs that Interact
Summary
Baclofen
Levodopa-containing Medications
  Supplements with Similar Side Effects
View List by Side Effect
  Supplements with Similar Warnings
View List by Warning
  Learn More About
Nutrition
 

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