Medication interaction hub

What Supplements Interact with Carbidopa?

Carbidopa brand name: Lodosyn. Every interaction below applies to the brands too.

21 Interactions 2 Major 10 Moderate 9 Minor
Curated & coded by · Clinical Pharmacist · Updated September 22, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Carbidopa? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Carbidopa against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

Carbidopa (Lodosyn) keeps levodopa working in Parkinson's disease, so anything that blocks its absorption can cost real motor control, and two of the 21 supplements on this list do exactly that at a level rated major. Magnesium is the one that surprises people: in a human study it cut carbidopa absorption by 81 percent and levodopa's by 35. Activated charcoal is the other, since it soaks up many oral drugs. Read those two entries before anything else here.

Most of the rest follow the same pattern in milder form. Fiber supplements, gums, and mucilage-rich herbs can blunt absorption, so space them well apart from your dose; ten entries rate moderate and nine minor, largely for that reason. A few work differently. 5-HTP raises the odds of serotonin-related side effects when carbidopa is on board, and one supplement worsened movement symptoms in a small study of people taking levodopa with carbidopa.

— , Clinical Pharmacist · July 18, 2026

Major 2 Moderate 10 Minor 9 No known interaction 1,431

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Carbidopa: Top Interactions at a Glance

The most significant Carbidopa supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 21 interacting ingredients — plus 1,431 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Carbidopa + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Probable Activated Charcoal + Carbidopai

Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the route of administration.

Read the full interaction Major Likelihood Probable Magnesium + Carbidopai

Magnesium can reduce the bioavailability of levodopa/carbidopa.

Read the full interaction
The complete list

Every Supplement Checked Against Carbidopa

All 1,452 ingredients in our database, ranked by severity — 21 with a Carbidopa interaction on file and 1,431 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Carbidopa?

One-line answers, one card per combination — scroll through today’s 20 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Magnesium with Carbidopa?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Magnesium can reduce the bioavailability of levodopa/carbidopa.

Full Magnesium + Carbidopa answer

Can you take Black Psyllium with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Black Psyllium + Carbidopa answer

Can you take Gum Arabic with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, gum arabic can alter the absorption of oral drugs due to its fiber content.

Full Gum Arabic + Carbidopa answer

Can you take Griffonia Simplicifolia with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking Griffonia simplicifolia seed extract with carbidopa might increase the risk of serotonergic and other adverse effects.

Full Griffonia Simplicifolia + Carbidopa answer

Can you take Guar Gum with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Guar gum might reduce the absorption of some oral drugs, potentially decreasing their effectiveness.

Full Guar Gum + Carbidopa answer

Can you take Slippery Elm with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, slippery elm may slow the absorption and reduce serum levels of oral drugs.

Full Slippery Elm + Carbidopa answer

Can you take Tragacanth with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, tragacanth might alter absorption of oral drugs.

Full Tragacanth + Carbidopa answer

Can you take Thyroid Extract with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Food and medications can interfere with thyroid hormone absorption.

Full Thyroid Extract + Carbidopa answer

Can you take Agar with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Agar forms a thick gel, which may disrupt the absorption of nutrients and medications.

Full Agar + Carbidopa answer

Can you take Algin with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, algin can alter the absorption of oral drugs.

Full Algin + Carbidopa answer

Can you take Blond Psyllium with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Blond Psyllium + Carbidopa answer

Can you take Carob with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, carob might also impair the absorption of oral drugs.

Full Carob + Carbidopa answer

Can you take Karaya Gum with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Co-administration of oral drugs with bulk forming laxatives such as karaya gum may decrease, increase, or have no effect on the absorption o...

Full Karaya Gum + Carbidopa answer

Can you take Marshmallow with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, mucilage in marshmallow might impair absorption of oral drugs.

Full Marshmallow + Carbidopa answer

Can you take Xanthan Gum with Carbidopa?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, xanthan gum can alter the absorption of oral drugs due to its fiber qualities.

Full Xanthan Gum + Carbidopa answer

Can you take Activated Charcoal with Carbidopa?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the rout...

Full Activated Charcoal + Carbidopa answer

Can you take Coffee Charcoal with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Coffee charcoal can reduce the absorption of orally administered drugs and should be separated from oral drug administration by at least two...

Full Coffee Charcoal + Carbidopa answer

Can you take European Mandrake with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concurrent use might increase absorption of some drugs because of inhibited gastrointestinal (GI) motility caused by European...

Full European Mandrake + Carbidopa answer

Can you take Glucomannan with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, glucomannan may decrease absorption of drugs taken orally.

Full Glucomannan + Carbidopa answer

Can you take Octacosanol with Carbidopa?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Concomitant use may worsen symptoms of Parkinson disease.

Full Octacosanol + Carbidopa answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Carbidopa is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Carbidopa, and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Carbidopa sits in 3 interaction categories. Open any one to see what the group means:

Oral Drugs 17 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

17 of the supplement ingredients on this page reach Carbidopa through this category.

Carbidopa (Lodosyn) 2 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

2 of the supplement ingredients on this page reach Carbidopa through this category.

Levodopa/Carbidopa (Sinemet) 2 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

2 of the supplement ingredients on this page reach Carbidopa through this category.

About Carbidopa

Carbidopa is a prescription medication used alongside levodopa or carbidopa-levodopa to treat the symptoms of Parkinson's disease and related parkinsonism conditions.

Generic name: Carbidopa  ·  Brand name: Lodosyn.

See the full Carbidopa drug information

Related: does Carbidopa deplete any nutrients?

Carbidopa has 1 reported nutrient association in the research literature — see the Carbidopa nutrient depletion report.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Carbidopa

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Carbidopa.

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Grounded search over our product catalog — every verdict comes from our interaction database, never AI guesswork. How we use AI

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Photograph any Supplement Facts panel — we read the ingredients and check each one against your medications. Free, in seconds.

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Products that contain Carbidopa-interacting ingredients

Real supplements from the NIH label database that contain the top interacting ingredients on this page — each one is worth a full label check before combining with Carbidopa.

Detox Support by myDNAhealth contains Magnesium SlimStyles Weight Loss Drink Mix French Vanilla by Natural Factors contains Magnesium SlimStyles Weight Loss Drink Mix Double Chocolate by Natural Factors contains Magnesium Dyno-Mins Magnesium Potassium & Bromelain by Nature's Plus contains Magnesium
Pharmacist Counseling Corner

Carbidopa & Supplements: Common Questions

What supplements interact with Carbidopa?
Our database currently documents 21 ingredients with a known Carbidopa interaction (2 major, 10 moderate, 9 minor). The practical move: scan the major group first, then look up the exact supplements you take rather than reading all 21. The highest-ranked right now: Activated Charcoal, Magnesium, Coffee Charcoal.
Which Carbidopa supplement interactions are the most serious?
The 2 major-rated combinations — led by Activated Charcoal and Magnesium — deserve real caution: these are the ones generally best avoided, or used only with your prescriber watching. If you take any of them today, don't panic and don't stop anything abruptly — call your pharmacist first. Jump to the ranked list.
Can I take vitamins or supplements while on Carbidopa?
Plenty of supplements coexist fine with Carbidopa; a shorter list does not. Rather than memorizing it, check the specific ingredients on your labels — the ranked list above covers every one we've checked, and multi-ingredient products can be checked label-by-label with our scanner. Try the label scanner or the interaction checker.
Do brands like Lodosyn have the same supplement interactions as Carbidopa?
Yes — Lodosyn all contain Carbidopa, so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
Does Carbidopa deplete any vitamins or nutrients?
It might — Carbidopa has 1 reported nutrient-depletion association in the research literature, which is a different question from interactions: instead of a supplement changing the drug, the drug may lower a nutrient over time. See the Carbidopa nutrient depletion report for the specifics and what to discuss with your pharmacist.
What about Carbidopa and my other medications?
This page covers Carbidopa against supplements and herbal ingredients. Checking Carbidopa against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker, or read the full Carbidopa drug information.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

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Sourcing

Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of September 22, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.