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Levodopa
Levodopa is the precursor required by the brain to produce dopamine, a neurotransmitter (chemical messenger in the nervous system). People with Parkinson’s disease have depleted levels of dopamine. Levodopa is used to increase dopamine in the brain, which reduces the symptoms of Parkinson’s disease. Levodopa is broken down by the body before it reaches the brain. To avoid this, levodopa is used with carbidopa, a drug that protects levodopa from breakdown. Levodopa is available alone or in a combination product.
Summary of Interactions with Vitamins, Herbs, & Foods
 May Be Beneficial: Depletion or interference—This medication may deplete these substances from the body or interfere with how they work; extra intake may help replenish them. | Vitamin B6 |
| May Be Beneficial: Side effect reduction and/or prevention—These substances may help reduce the likelihood and/or severity of a potential side effect caused by the medication.
| none |
| May Be Beneficial: Supportive interaction—These substances may help this medication work better. | none |
 Avoid: Reduces drug effectiveness—When taking this medication, avoid these substances as they may decrease the medication's absorption and/or activity in the body. | none |
| Avoid: Adverse interaction—When taking this medication, avoid these substances, as the combination may cause undesirable or dangerous interactions. | none |
 Check: Explanation needed—When taking this medication, read the article details and discuss them with your doctor or pharmacist before taking these substances. | none |
An asterisk (*) next to an item in the summary indicates that the interaction is supported only by weak, fragmentary, and/or contradictory scientific evidence.
Also indexed as:
- Dopar,
- Larodopa,
- levodopa
About this treatment
Interactions with Vitamins
Vitamin B6
Levodopa is broken down in the body by a process requiring vitamin B6. Breakdown may deplete available vitamin B6. Carbidopa blocks levodopa breakdown and prevents vitamin B6 depletion. People taking levodopa/carbidopa (Sinemet®), or levodopa plus carbidopa (Lodosyn®) have no risk for levodopa-induced vitamin B6 deficiency; it is not a problem for people to supplement vitamin B6 while taking Sinemet.
For people taking levodopa alone, small amounts of vitamin B6 (5–10 mg per day) may prevent levodopa-induced vitamin B6 deficiency. Amounts of vitamin B6 slightly higher than those required to replace depleted levels, may reduce the effectiveness of levodopa therapy and should not be taken.
Interactions with Foods & Other Compounds
Food
Food, especially foods high in protein, compete with levodopa for absorption. However, levodopa may be taken with food to avoid stomach upset. It is important to take levodopa at the same time every day, always with or always without food. People with questions about levodopa and food should ask their prescribing doctor or pharmacist. Taking sustained-release Sinemet® CR with food may increase blood levels of levodopa. It is important to take Sinemet® CR at the same time every day, always with or always without food. People with questions about Sinemet® CR and food should ask their prescribing doctor or pharmacist.
Last Review: 05-11-2011
Copyright © 2011 Aisle7. All rights reserved. www.Aisle7.net
Please read the disclaimer about the limitations of the information provided here. Do NOT rely solely on the information in this article. The Aisle7 knowledgebase does not contain every possible interaction.
Learn more about Aisle7, the company.
The information presented in Aisle7 is for informational purposes only. It is based on scientific studies (human, animal, or in vitro), clinical experience, or traditional usage as cited in each article. The results reported may not necessarily occur in all individuals. For many of the conditions discussed, treatment with prescription or over-the-counter medication is also available. Consult your doctor, practitioner, and/or pharmacist for any health problem and before using any supplements or before making any changes in prescribed medications. Information expires June 2011.
© 1995-2011 Healthwise, Incorporated. Healthwise, Healthwise for every health decision, and the Healthwise logo are trademarks of Healthwise, Incorporated. This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. How this information was developed to help you make better health decisions.
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