ThyreXX Ingredients & Drug Interactions
What is this page for?
First and foremost: checking ThyreXX against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.
Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy
ThyreXX is a dietary supplement by Viatrexx Bio Incorporated with 3 active ingredients. Its ingredients are commonly taken for preventing iodine deficiency, supporting thyroid hormone production, general energy and metabolism support.Based on those ingredients, 891 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Bladderwrack, Iodine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against ThyreXX by Viatrexx Bio Incorporated
Ask about any prescription or over-the-counter medication and we check it for interactions with ThyreXX by Viatrexx Bio Incorporated — and tell you which ingredient is responsible.
AI summaries are generated from our interaction database for education only — always confirm with your pharmacist. How we use AI
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HelloPharmacist Scorecard of ThyreXX by Viatrexx Bio Incorporated
Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.
What’s inside
Low disclosure
ThyreXX is a liquid supplement with 3 active ingredients. Iodine is the primary component — a mineral your body needs for thyroid function.
Bladderwrack (Fucus vesiculosus) is a type of seaweed that's also high in iodine and has been used traditionally for thyroid support. The product also includes a proprietary micro blend and an ingredient called adrenal, whose specific roles aren't detailed in the available information.
The liquid is formulated with alcohol and water as inactive ingredients.
Does it work?
Strong evidence
For iodine, the evidence supports its use for preventing iodine deficiency and protecting the thyroid after radiation exposure — both are rated likely effective. Iodine may also help with oral mouth sores and gum disease, though that evidence is still preliminary.
For bladderwrack, we don't have reliable evidence to rate it for any condition — the data we hold simply isn't established enough to say whether it works for what people typically take it for.
How safe is it?
Well-documented data
Iodine is well tolerated when you stay within normal dietary amounts, but high doses can trigger thyroid problems like goiter, overactive or underactive thyroid, and in rare cases, thyroid cancer. You might also experience nausea, headache, a metallic taste, or stomach upset.
Bladderwrack carries the same concerns because of its high iodine content — and it may also concentrate heavy metals from seawater. Neither is recommended in pregnancy or while breastfeeding.
The safety data advises against bladderwrack during pregnancy and lactation due to excess iodine and the risk of thyroid disruption in the baby.
Meds to double-check
Moderate interaction found
Before taking ThyreXX, check with your pharmacist if you take lithium, antithyroid drugs (like propylthiouracil), thyroid hormone replacement (like levothyroxine), or amiodarone. All three drug types have moderate interactions with the iodine in this product.
Additionally, if you take blood thinners or certain enzyme-dependent medications, mention those too — bladderwrack may affect how they work, though the evidence is theoretical.
The bottom line
Scorecard at a glanceFormula with limited ingredient disclosure with clinical evidence supporting its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
ThyreXX is built around iodine, which works well for iodine deficiency and radiation protection, but it's not a casual supplement — it directly affects your thyroid. If you take lithium, antithyroid drugs, thyroid hormone replacement, or amiodarone, you absolutely need to talk with your pharmacist before starting this product.
Pregnant or breastfeeding? Skip this one.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jun 20, 2024.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about ThyreXX, straight from the product label.
| Brand | Viatrexx Bio Incorporated |
|---|---|
| Barcode (UPC) | 041910680500 |
| Net contents | 1.7 Ounce(s); 50 mL |
| Market status | On market |
| Date entered into DSLD | Jun 20, 2024 |
| DSLD ID | 309877 |
| Product type | Other Combinations |
| Supplement form | Liquid |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for ThyreXX by Viatrexx Bio Incorporated, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Iodine | 0 NP | -- |
| Bladderwrack | 0 NP | -- |
| Proprietary Micro Blend | 0 NP | -- |
| Adrenal | 0 NP | -- |
Other ingredients: Alcohol, Water
Tap any ingredient to jump to its full detail below.
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formulation
ThyreXX supports a healthy thyroid and adrenal.
Free of: Gluten, wheat, yeast, corn, dairy, soy, sugar & artificial colors/flavors.
Suggested/Recommended/Usage/Directions
Suggested use: As a dietary supplement, 1-5 spray(s) under the tongue, 1-3 time(s) a day or as recommended by your healthcare practitioner.
Precautions
Caution: Do not exceed recommended dose.
Pregnant or nursing mothers, children under the age of 18 and individuals with a known medical condition should consult with a healthcare practitioner before taking this or any dietary supplement.
Pregnant or nursing mothers, children under the age of 18 and individuals with a known medical condition should consult with a healthcare practitioner before taking this or any dietary supplement. Keep out of reach of children.
Do not use if safety seal is damaged or missing.
Storage
Store in a cool, dry place.
FDA Disclaimer Statement
These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.
FDA Statement of Identity
Dietary Supplement
General Statements
For more information visit: Viatrexx.com
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
ThyreXX by Viatrexx Bio Incorporated label
The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.
Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.
View the full label (PDF)The Ingredients in ThyreXX by Viatrexx Bio Incorporated
These are the 3 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Spray(s) Dosage formLiquid Servings per container300 Amounts shown are per serving.
Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.
Proprietary Micro Blend
- › Iodine
- › Bladderwrack
- › Adrenal
Other (inactive) ingredients: Alcohol, Water. These complete the product’s ingredient list but are not active constituents.
ThyreXX by Viatrexx Bio Incorporated Drug Interactions
HelloPharmacist Interaction Report
ThyreXX by Viatrexx Bio Incorporated contains iodine and bladderwrack (an iodine-rich seaweed), both of which interact with several medication types.
The most serious concern is their combined effect on lithium — both ingredients can reduce thyroid function when taken alongside lithium, and there's a reported case of the opposite (elevated thyroid hormone) with bladderwrack and lithium together. If you take lithium, your thyroid function needs close monitoring with this product.
Read the full breakdown — every affected drug type, severity by severity
These ingredients also interact with antithyroid drugs (like propylthiouracil or methimazole), thyroid hormone replacement (like levothyroxine), and amiodarone — a heart rhythm medication with high iodine content. In each case, the iodine load from ThyreXX can disrupt how these medications work or push your thyroid into dangerous territory.
Bladderwrack carries additional theoretical interactions with blood thinners (anticoagulants) and several drug-metabolizing enzymes, though these haven't been confirmed in people yet.
Additionally, we couldn't check the ingredient listed as "Adrenal" — we hold no data for it. Use the medication checker on this page to run your exact prescriptions against the full product before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against ThyreXX?
Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.
Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in ThyreXX interact with 891 drugs. Click any drug to see the details.
2 of the 3 ingredients in ThyreXX interact with drugs. Each result below shows which ingredient is responsible. Bladderwrack Iodine
AmiodaroneCordarone, Pacerone
How Amiodarone interacts with ThyreXX — through 2 ingredients. Tap an ingredient for the detail:
BladderwrackCytochrome P450 2c8 (cyp2c8) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates +1 Moderate
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP2C8 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Amiodarone interactionIodineAmiodarone (cordarone) Moderate
Interaction Summary
Combining iodine with amiodarone might cause excessively high iodine levels.
Read the full Iodine + Amiodarone interactionCarbimazoleNeo-Mercazole
How Carbimazole interacts with ThyreXX — through 2 ingredients. Tap an ingredient for the detail:
IodineAntithyroid Drugs Moderate
Interaction Summary
Iodine might alter the effects of antithyroid drugs.
Read the full Iodine + Carbimazole interactionBladderwrackAntithyroid Drugs Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of antithyroid drugs.
Read the full Bladderwrack + Carbimazole interactionConjugated EstrogensCenestin, Enjuvia, Premarin, Premarin Vaginal Cream
How Conjugated Estrogens interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackCytochrome P450 3a4 (cyp3a4) Substrates, Thyroid Hormone Moderate
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Conjugated Estrogens interactionDesiccated Thyroid ExtractWesthroid, WP Thyroid
How Desiccated Thyroid Extract interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Desiccated Thyroid Extract interactionDesiccated Thyroid Extract (prescription Drug)Nature-Throid, Thyrar
How Desiccated Thyroid Extract (prescription Drug) interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Desiccated Thyroid Extract (prescription Drug) interactionDextrothyroxineCholoxin
How Dextrothyroxine interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Dextrothyroxine interactionHuman Chorionic Gonadotropin (hcg)Pregnyl
How Human Chorionic Gonadotropin (hcg) interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Human Chorionic Gonadotropin (hcg) interactionLevothyroxineEltroxin, Estre, Euthyrox, Levo-T, Levolet, Levothroid +5 more
How Levothyroxine interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Levothyroxine interactionLevothyroxine SodiumErmez, Thyquidity, Tirosint-Sol
How Levothyroxine Sodium interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Levothyroxine Sodium interactionLevothyroxine, LiothyronineArmour Thyroid
How Levothyroxine, Liothyronine interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Levothyroxine, Liothyronine interactionLiothyronineCytomel
How Liothyronine interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Liothyronine interactionLiotrixEuthroid 1, Euthroid 1/2, Euthroid 3
How Liotrix interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Liotrix interactionLiotrix, T4/t3Euthroid 2
How Liotrix, T4/t3 interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Liotrix, T4/t3 interactionLithium Carbonate (prescription Drug)Eskalith, Lithium Carbonate
How Lithium Carbonate (prescription Drug) interacts with ThyreXX — through 2 ingredients. Tap an ingredient for the detail:
IodineLithium Moderate
Interaction Summary
Combining iodine with lithium might have additive hypothyroid effects.
Read the full Iodine + Lithium Carbonate (prescription Drug) interactionBladderwrackLithium Moderate
Interaction Summary
Concomitant use of Fucus vesiculosus and lithium has resulted in hyperthyroidism.
Read the full Bladderwrack + Lithium Carbonate (prescription Drug) interactionMenotropinsMenopur, Repronex
How Menotropins interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Menotropins interactionMethenamine MandelateMandelamine, Methimazole
How Methenamine Mandelate interacts with ThyreXX — through 2 ingredients. Tap an ingredient for the detail:
IodineAntithyroid Drugs Moderate
Interaction Summary
Iodine might alter the effects of antithyroid drugs.
Read the full Iodine + Methenamine Mandelate interactionBladderwrackAntithyroid Drugs Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of antithyroid drugs.
Read the full Bladderwrack + Methenamine Mandelate interactionMethimazoleTapazole
How Methimazole interacts with ThyreXX — through 2 ingredients. Tap an ingredient for the detail:
BladderwrackAntithyroid Drugs Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of antithyroid drugs.
Read the full Bladderwrack + Methimazole interactionIodineAntithyroid Drugs Moderate
Interaction Summary
Iodine might alter the effects of antithyroid drugs.
Read the full Iodine + Methimazole interactionOspemifeneOsphena
How Ospemifene interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackCytochrome P450 3a4 (cyp3a4) Substrates, Thyroid Hormone Moderate
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Ospemifene interactionPotassium Iodide (prescription Drug)Thyro-Block
How Potassium Iodide (prescription Drug) interacts with ThyreXX — through 2 ingredients. Tap an ingredient for the detail:
IodineAntithyroid Drugs Moderate
Interaction Summary
Iodine might alter the effects of antithyroid drugs.
Read the full Iodine + Potassium Iodide (prescription Drug) interactionBladderwrackAntithyroid Drugs Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of antithyroid drugs.
Read the full Bladderwrack + Potassium Iodide (prescription Drug) interactionPropylthiouracil, PtuPropylthiouracil
How Propylthiouracil, Ptu interacts with ThyreXX — through 2 ingredients. Tap an ingredient for the detail:
IodineAntithyroid Drugs Moderate
Interaction Summary
Iodine might alter the effects of antithyroid drugs.
Read the full Iodine + Propylthiouracil, Ptu interactionBladderwrackAntithyroid Drugs Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of antithyroid drugs.
Read the full Bladderwrack + Propylthiouracil, Ptu interactionTestosterone UndecanoateAndriol, Aveed, Jatenzo, Kyzatrex
How Testosterone Undecanoate interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackCytochrome P450 3a4 (cyp3a4) Substrates, Thyroid Hormone Moderate
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Testosterone Undecanoate interactionThyroglobulinProloid
How Thyroglobulin interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Thyroglobulin interactionThyroid HormoneEtwon
How Thyroid Hormone interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackThyroid Hormone Moderate
Interaction Summary
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Read the full Bladderwrack + Thyroid Hormone interactionAdo-trastuzumab EmtansineKadcyla
How Ado-trastuzumab Emtansine interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Ado-trastuzumab Emtansine interactionAbciximabReoPro
How Abciximab interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackAnticoagulant/antiplatelet Drugs Minor
Interaction Summary
Theoretically, taking Fucus vesiculosus with antiplatelet or anticoagulant drugs might increase the risk of bruising and bleeding.
Read the full Bladderwrack + Abciximab interactionAbemaciclibVerzenio
How Abemaciclib interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Abemaciclib interactionAbiraterone
How Abiraterone interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Abiraterone Acetate interactionAbrocitinibCibinqo
How Abrocitinib interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackAnticoagulant/antiplatelet Drugs, Cytochrome P450 2c9 (cyp2c9) Substrates Minor
Interaction Summary
Theoretically, taking Fucus vesiculosus with antiplatelet or anticoagulant drugs might increase the risk of bruising and bleeding.
Read the full Bladderwrack + Abrocitinib interactionAcalabrutinibCalquence
How Acalabrutinib interacts with ThyreXX — through 1 ingredient. Tap an ingredient for the detail:
BladderwrackCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
Read the full Bladderwrack + Acalabrutinib interactionEach ingredient & the kinds of drugs it affects
For each ingredient in ThyreXX with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.
Bladderwrack
Amiodarone (Cordarone)
Theoretically, combining Fucus vesiculosus with amiodarone might cause excessively high iodine levels.
Fucus vesiculosus contains high concentrations of iodine. Amiodarone contains 37.3% iodine and can increase iodine levels. Concomitant use might increase the risk of having excessive iodine levels and adversely affecting thyroid function. Monitor thyroid function.
Antithyroid Drugs
Due to its iodine content, Fucus vesiculosus might alter the effects of antithyroid drugs.
Fucus vesiculosus contains high concentrations of iodine. Iodine in high doses has been reported to cause both hyperthyroidism and hypothyroidism, depending on the individual's past medical history. Taking Fucus vesiculosus while using antithyroid drugs could alter the effects of the antithyroid drugs.
Lithium
Concomitant use of Fucus vesiculosus and lithium has resulted in hyperthyroidism.
There is a case of hyperthyroidism occurring in a patient taking Fucus vesiculosus and lithium. Monitor thyroid hormones closely in patients taking lithium and Fucus vesiculosus concomitantly.
Thyroid Hormone
Due to its iodine content, Fucus vesiculosus might alter the effects of thyroid hormone.
Fucus vesiculosus contains high concentrations of iodine. Iodine in high doses has been reported to cause both hyperthyroidism and hypothyroidism, depending on the individual's past medical history. Taking Fucus vesiculosus while using thyroid hormone could alter the effects of thyroid hormone.
Anticoagulant/Antiplatelet Drugs
Theoretically, taking Fucus vesiculosus with antiplatelet or anticoagulant drugs might increase the risk of bruising and bleeding.
In vitro evidence suggests that a constituent of Fucus vesiculosus, known as fucoidan, has anticoagulant effects. However, in clinical research, fucoidan does not seem to have significant anticoagulant activity when taken orally, possibly due to poor absorption.
Cytochrome P450 2C8 (Cyp2C8) Substrates
Theoretically, concomitant use of Fucus vesiculosus with CYP2C8 substrates might increase the risk for adverse effects.
In vitro research shows that fucoidan, a constituent of Fucus vesiculosus, inhibits CYP2C8. This interaction has not been reported in humans.
Cytochrome P450 2C9 (Cyp2C9) Substrates
Theoretically, concomitant use of Fucus vesiculosus with CYP2C9 substrates might increase the risk for adverse effects.
In vitro research shows that fucoidan, a constituent of Fucus vesiculosus, inhibits CYP2C9. This interaction has not been reported in humans.
Cytochrome P450 2D6 (Cyp2D6) Substrates
Theoretically, concomitant use of Fucus vesiculosus with CYP2D6 substrates might alter the effects of these substrates.
In vitro research shows that fucoidan, a constituent of Fucus vesiculosus, both inhibits and induces CYP2D6. This interaction has not been reported in humans.
Cytochrome P450 3A4 (Cyp3A4) Substrates
Theoretically, concomitant use of Fucus vesiculosus with CYP3A4 substrates might increase the risk for adverse effects.
In vitro research shows that fucoidan, a constituent of Fucus vesiculosus, inhibits CYP3A4. This interaction has not been reported in humans.
Iodine
Amiodarone (Cordarone)
Combining iodine with amiodarone might cause excessively high iodine levels.
Amiodarone contains 37.3% iodine and can increase iodine levels. Concomitant use with iodine might increase the risk of having excessive iodine levels and adversely affecting thyroid function. Monitor thyroid function.
Antithyroid Drugs
Iodine might alter the effects of antithyroid drugs.
Iodine in high doses has been reported to cause both hyperthyroidism and hypothyroidism, depending on the individual's past medical history. Taking iodine while using antithyroid drugs could alter the effects of the antithyroid drugs.
Lithium
Combining iodine with lithium might have additive hypothyroid effects.
Lithium can inhibit thyroid function. Several case reports suggest that concomitant use of lithium and potassium iodide can reduce thyroid function in otherwise healthy adults. Monitor thyroid function.
Brand information
Manufacturer and brand details for ThyreXX, from the product label.
Viatrexx Bio Incorporated
See all Viatrexx Bio Incorporated products- Name
- Viatrexx
- Phone Number
- 1.888.743.6652
- Web Address
- Viatrexx.com
ThyreXX by Viatrexx Bio Incorporated: Common Questions
Does ThyreXX by Viatrexx Bio Incorporated interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What's iodine actually for?
Why is bladderwrack in here?
Can I take this if I'm pregnant?
What side effects might I get?
Can this mess up my thyroid?
I'm taking thyroid medicine — is this okay?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if ThyreXX is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind ThyreXX’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Iodine
Interacts with 7 drugsIodine is an essential mineral your body needs to make thyroid hormones, and most people get enough from iodized salt, dairy, and seafood. Supplements help when you are truly deficient, but...
Read the full Iodine monograph → Herb & supplement monographFucus Vesiculosus
Interacts with 891 drugsFucus vesiculosus (bladderwrack) is a brown seaweed rich in iodine that has been used traditionally for thyroid concerns, weight, and skin. There is little solid human evidence to support mo...
Read the full Fucus Vesiculosus monograph →Sources & How We Checked
ThyreXX's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- NIH Dietary Supplement Label Database (DSLD) — The official product label on file for this supplement.
- Natural Medicines (Therapeutic Research Center) — Evidence-graded clinical reference behind the ingredient interaction data.
Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.
The 41 references behind this product’s interaction data
Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.
Iodine 26 references
- McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
- Goodman GA, Rall TW, Nies AS, Taylor P. The Pharmacological Basis of Therapeutics, 9th ed.
- Ghent WR, Eskin BA, Low DA, Hill LP. Iodine replacement in fibrocystic disease of the breast. Can J Surg 1993;36:453-60.
- Potassium iodide for nuclear exposure. Pharmacist's Letter/Prescriber's Letter 2001;17(12):171214.
- Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
- Cabezas C, Bustamante B, Holgado W, Begue RE. Treatment of cutaneous sporotrichosis with one daily dose of potassium iodide. Pediatr Infect Dis J 1996;15:352-4. PubMed
- Sterling JB, Heymann WR. Potassium iodide in dermatology: a 19th century drug for the 21st century-uses, pharmacology, adverse effects, and contraindications. J Am Acad Dermatol 2000;43:691-7. PubMed
- Yarrington CD, Pearce EN. Dietary iodine in pregnancy and postpartum. Clin Obstet Gynecol 2011;54:459-70. PubMed
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