Drug interactions
Carbidopa + Iron
Severity: Moderate
Carbidopa and Iron: moderate interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Oral iron can lower the absorption of levodopa and carbidopa, which may weaken symptom control in Parkinson's disease.
What this interaction means in plain words
Carbidopa and Iron can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Carbidopa belongs to Central Nervous System; Iron belongs to Gastrointestinal Tract.
Why it happens
Iron chelates levodopa and carbidopa in the gut, reducing absorption.
What to do
Separate iron from carbidopa/levodopa by at least 2 to 3 hours and monitor motor response.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Carbidopa
Other interactions of Iron
- Acetohydroxamic acid + Iron Moderate
- Aluminum hydroxide + Iron Moderate
- Baloxavir marboxil + Iron Moderate
- Calcium acetate + Iron Moderate
- Calcium carbonate + Iron Moderate
- Calcium citrate + Iron Moderate
Frequently asked questions
Can I take Carbidopa with Iron?
MediHelp rates the interaction as moderate. Carbidopa and Iron can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Oral iron can lower the absorption of levodopa and carbidopa, which may weaken symptom control in Parkinson's disease.
How serious is the interaction between Carbidopa and Iron?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Separate iron from carbidopa/levodopa by at least 2 to 3 hours and monitor motor response.
What other medicines interact with Carbidopa?
MediHelp also lists interactions of Carbidopa with, for example, Metoclopramide, Amlodipine-atorvastatin, Amlodipine-benazepril. The full list is on the Carbidopa page.
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