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Dietary supplement

Vitamin D3 100 mcg (4,000 IU) Ingredients & Drug Interactions

by Carlson

Vitamin D3 100 mcg (4,000 IU) label
See full label image
Softgel Capsule Category: Vitamin
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 30, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Vitamin D3 100 mcg (4,000 IU) 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

The interaction bottom line Most serious interaction: Moderate

Vitamin D3 100 mcg (4,000 IU) is a dietary supplement by Carlson with 1 active ingredient. Its ingredients are commonly taken for bone health and osteoporosis, correcting vitamin d deficiency, immune system support.Based on those ingredients, 717 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Vitamin D. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Vitamin D3 100 mcg (4,000 IU) by Carlson

Ask about any prescription or over-the-counter medication and we check it for interactions with Vitamin D3 100 mcg (4,000 IU) by Carlson — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Vitamin D3 100 mcg (4,000 IU) by Carlson

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.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Sep 24, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: vitamin D (cholecalciferol), at 100 mcg per softgel, which equals 4,000 IU—the maximum daily amount considered safe for long-term use in adults. The inactive ingredients are sunflower oil (the carrier) and the soft gel shell itself.

Does it work?

Strong evidence
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Strong

Clinical evidence supports at least one of this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: Bone support, immune function, and heart health.
  • We looked for evidence on: Cardiovascular disease (CVD), Corticosteroid-induced osteoporosis, Fall prevention, Fractures, Frailty, Heart failure — and 4 related terms.
  • The strongest evidence on file: Vitamin D is rated "Likely Effective" for Corticosteroid-induced osteoporosis (Natural Medicines).
  • Also on file: Vitamin D is rated "Possibly Effective" for Heart failure, Hyperparathyroidism-related bone loss.
  • Also on file: Vitamin D is rated "Possibly Ineffective" for Cardiovascular disease (CVD), Fractures.

Vitamin D at this dose is effective for treating vitamin D deficiency conditions, including rickets, osteomalacia (soft bones from low vitamin D), familial hypophosphatemia (a genetic calcium disorder), renal osteodystrophy (bone disease from kidney failure), and hypoparathyroidism (underactive parathyroid glands). The evidence we hold does not cover effectiveness for other uses like bone health in otherwise healthy people.

The evidence, ingredient by ingredient Vitamin D

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Vitamin D is generally well tolerated at recommended doses, but very high doses over extended time can cause toxicity, with symptoms including high blood calcium (hypercalcemia), bone loss in adults, and slowed growth in children. Some people taking excessive vitamin D have also experienced eye inflammation and light sensitivity.

Vitamin D is likely safe during pregnancy at recommended amounts, but some evidence suggests possible concern at higher doses—use only under your doctor's guidance. It is considered likely safe while breastfeeding at recommended doses.

Side effects, ingredient by ingredient Vitamin D

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Vitamin D.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: heart-rhythm medications.
  • For scale: 718 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking this product, double-check with your doctor or pharmacist if you take digoxin or other heart medications (verapamil, diltiazem), thiazide diuretics, atorvastatin, calcipotriene, or aluminum-based antacids. The most serious risk is with digoxin.

Also mention it if you take any medications broken down by the liver enzyme CYP3A4—a large group that includes many common drugs.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

This product is appropriate for people being treated for vitamin D deficiency or related bone and mineral disorders under medical supervision. If you take medications for your heart, blood pressure, cholesterol, or kidney disease, or use aluminum-containing antacids, talk with your doctor or pharmacist before adding this supplement—the dose is right at the safety threshold, and certain drug combinations need monitoring.

Start any new supplement by running it past the person who manages your prescriptions.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated May 19, 2022.

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

At a glance

General information

Key facts about Vitamin D3 100 mcg (4,000 IU), straight from the product label.

Brand Carlson
Barcode (UPC) 088395014338
Net contents 360 Softgel(s)
Market status On market
Date entered into DSLD May 19, 2022
DSLD ID 266362
Product type Vitamin
Supplement form Softgel Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free
From the label
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 Vitamin D3 100 mcg (4,000 IU) by Carlson, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Softgel(s)
Maximum serving Sizes:
1 Softgel(s)
Servings per container
360
UPC/BARCODE
088395014338
IngredientAmount% DV
Vitamin D100 mcg500%

Other ingredients: Sunflower Oil, Soft Gel Shell

Tap any ingredient to jump to its full detail below.

Label statements
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.
Seals/Symbols

IGEN Non-GMO Tested

FDA Statement of Identity

Dietary Supplement

Formulation

Bone support Immune function Heart health

IGEN Non-GMO Tested Gluten-free Milk/Casein-free No artificial preservatives

Scientific research indicates Vitamin D3 plays an important role in promoting teeth, bone, and muscle health; immune and cardiovascular system function; and calcium absorption.

Potency & quality guaranted An FDA regulated facility

General Statements

Providing the highest quality nutritional supplements since 1965

Suggested/Recommended/Usage/Directions

Directions: Adults: take one soft gel daily at mealtime.

Storage

Keep bottle tightly closed. Store away from heat and moisture.

FDA Disclaimer Statement

These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Vitamin D3 100 mcg (4,000 IU) by Carlson label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Vitamin D3 100 mcg (4,000 IU) label

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)
What’s inside

The Ingredients in Vitamin D3 100 mcg (4,000 IU) by Carlson

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size1 Softgel(s) Dosage formSoftgel Capsule Servings per container360 Amounts shown are per serving.

Vitamin D

Interacts with
717 drugs
100 mcg per serving Form: Cholecalciferol

Vitamin D is a fat-soluble vitamin that helps your body absorb calcium and is important for healthy bones, muscles, and immune function. Many people,...

Vitamin D monograph & interactions

Other (inactive) ingredients: Sunflower Oil, Soft Gel Shell. These complete the product’s ingredient list but are not active constituents.

Interaction report

Vitamin D3 100 mcg (4,000 IU) by Carlson Drug Interactions

Want to check YOUR meds against Vitamin D3 100 mcg (4,000 IU)?

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 checker
717Drugs
80 Moderate 637 Minor

Ingredients driving the most interactions

Vitamin D 717

Individual Drug Interactions

The ingredients in Vitamin D3 100 mcg (4,000 IU) interact with 717 drugs. Click any drug to see the details.

1 of the 1 ingredient in Vitamin D3 100 mcg (4,000 IU) interact with drugs. Each result below shows which ingredient is responsible. Vitamin D

Each ingredient & the kinds of drugs it affects

For each ingredient in Vitamin D3 100 mcg (4,000 IU) with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Vitamin D8 drug types · 717 drugs

Aluminum

Vitamin D might increase aluminum absorption and toxicity, but this has only been reported in people with renal failure.
The protein that transports calcium across the intestinal wall can also bind and transport aluminum. This protein is stimulated by vitamin D, which may therefore increase aluminum absorption. This mechanism may contribute to increased aluminum levels and toxicity in people with renal failure, when they take vitamin D and aluminum-containing phosphate binders chronically.

Likelihood Probable Evidence B
Atorvastatin (Lipitor)

Vitamin D might reduce absorption of atorvastatin.
A small, low-quality clinical study shows that taking vitamin D reduces levels of atorvastatin and its active metabolites by up to 55%. However, while atorvastatin levels decreased, total cholesterol, low-density lipoprotein (LDL) cholesterol, and high-density lipoprotein (HDL) cholesterol levels did not substantially change. Atorvastatin is metabolized in the gut by CYP3A4 enzymes, and researchers theorized that vitamin D might induce CYP3A4, causing reduced levels of atorvastatin. However, this proposed mechanism was not specifically studied.

Likelihood Probable Evidence B
Calcipotriene (Dovonex)

Taking calcipotriene with vitamin D increases the risk for hypercalcemia.
Calcipotriene is a vitamin D analog used topically for psoriasis. It can be absorbed in sufficient amounts to cause systemic effects, including hypercalcemia. Theoretically, combining calcipotriene with vitamin D supplements might increase the risk of hypercalcemia.

Likelihood Probable Evidence D
Digoxin (Lanoxin)

Theoretically, hypercalcemia induced by high-dose vitamin D can increase the risk of arrhythmia from digoxin.
High doses of vitamin D can cause hypercalcemia. Hypercalcemia increases the risk of fatal cardiac arrhythmias with digoxin. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and digoxin concurrently.

Likelihood Possible Evidence D
Diltiazem (Cardizem, Others)

Theoretically, hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of diltiazem for arrhythmia.
High doses of vitamin D can cause hypercalcemia. Hypercalcemia can reduce the effectiveness of verapamil in atrial fibrillation. Theoretically this could also occur with diltiazem. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and diltiazem concurrently.

Likelihood Probable Evidence B
Thiazide Diuretics

Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Thiazide diuretics decrease urinary calcium excretion, which could lead to hypercalcemia if vitamin D supplements are taken concurrently. This has been reported in people being treated with vitamin D for hypoparathyroidism, and also in elderly people with normal parathyroid function who were taking a thiazide, vitamin D, and calcium-containing antacids daily.

Likelihood Probable Evidence D
Verapamil (Calan, Others)

Hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of verapamil for arrhythmia.
Hypercalcemia due to high doses of vitamin D can reduce the effectiveness of verapamil in atrial fibrillation. Avoid vitamin D doses above the tolerable upper intake level (4000 IU daily for adults) and monitor serum calcium levels in people taking vitamin D and verapamil concurrently.

Likelihood Probable Evidence B
Cytochrome P450 3A4 (Cyp3A4) Substrates

Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
There is some concern that vitamin D might induce CYP3A4. In vitro research suggests that vitamin D induces CYP3A4 transcription. Additionally, observational research has found that increased UV light exposure and serum vitamin D levels are associated with decreased serum levels of CYP3A4 substrates such as tacrolimus and sirolimus, while no association between UV light exposure or vitamin D levels and levels of mycophenolic acid, a non-CYP3A4 substrate, was found. A small, low-quality clinical study shows that taking vitamin D reduces levels of the CYP3A4 substrate atorvastatin and its active metabolites by up to 55%; however, the clinical effects of atorvastatin were not reduced. While researchers theorized that vitamin D might induce CYP3A4, this proposed mechanism was not specifically studied.

Likelihood Possible Evidence D
Vitamin D full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Vitamin D3 100 mcg (4,000 IU), from the product label.

Carlson

See all Carlson products
Name
Carlson Division of J.R. Carlson Laboratories, Inc.
City
Arlington Heights
State
IL
ZipCode
60004
Phone Number
888-234-5656
Web Address
carlsonlabs.com
Pharmacist Counseling Corner

Vitamin D3 100 mcg (4,000 IU) by Carlson: Common Questions

Does Vitamin D3 100 mcg (4,000 IU) by Carlson interact with any medications?
Yes. Based on its ingredients, Vitamin D3 100 mcg (4,000 IU) has a known interaction with 717 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Vitamin D3 100 mcg (4,000 IU) contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is this dose safe to take every day?
Yes—4,000 IU is the tolerable upper intake level for adults, meaning it's safe for daily long-term use. But it's the ceiling, not a target. If you're taking it under medical guidance for a deficiency, your doctor will let you know when to stop or adjust. If you're taking it on your own, ask your doctor or pharmacist whether you actually need it.
Can I take this while pregnant?
Vitamin D is likely safe during pregnancy at recommended doses, but the data also hints at possible concern at higher amounts. This dose is at the upper limit, so use it only under your doctor's guidance during pregnancy. They'll tell you if it's right for you and your baby.
What are the symptoms of taking too much vitamin D?
Vitamin D toxicity causes high blood calcium, which can lead to bone loss, poor growth in children, eye inflammation, and light sensitivity. Serious cases can involve kidney damage and anemia. This typically happens with very high doses over time, not from a single dose or short-term use at recommended levels.
Can I take this with my blood pressure or heart medication?
It depends on which medication you take. Certain blood pressure and heart rhythm drugs can interact with vitamin D. Check with your doctor or pharmacist before combining them—they may want to monitor your blood calcium or adjust your dose.
Does this product have any fillers or other inactive ingredients?
Yes—it contains sunflower oil as a carrier and a soft gel shell. There are no unnecessary fillers beyond what's needed to make the softgel.
Is vitamin D in this product the same as the vitamin D your skin makes from sunlight?
The product facts we hold don't cover that comparison. What we can tell you is that this product contains vitamin D (cholecalciferol), the form your body uses, and it's effective for treating vitamin D deficiency disorders.

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

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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.

Vitamin D3 100 mcg (4,000 IU) label
Go deeper

The Full Monographs Behind Vitamin D3 100 mcg (4,000 IU)’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Vitamin D

Interacts with 717 drugs

Vitamin D is a fat-soluble vitamin that helps your body absorb calcium and is important for healthy bones, muscles, and immune function. Many people, especially those with low sun exposure,...

Read the full Vitamin D monograph →
Sources

Sources & How We Checked

Vitamin D3 100 mcg (4,000 IU)'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.

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 25 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.

Vitamin D 25 references
  1. McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
  2. Tatro DS, ed. Drug Interactions Facts. Facts and Comparisons Inc., St. Louis, MO. 1999.
  3. Koutkia P, Chen TC, Holick MF. Vitamin D intoxication associated with an over-the-counter supplement. N Engl J Med 2001;345:66-7. PubMed
  4. Bar-Or D, Yoel G. Calcium and calciferol antagonize effect of verapamil in atrial fibrillation. Br Med J 1981;282:1585-6.
  5. Demontis R, Leflon A, Fournier A, et al. 1 alpha(OH) vitamin D3 increases plasma aluminum in hemodialyzed patients taking AI(OH)3. Clin Nephrol 1986;26:146-9.
  6. Crowe M, Wollner L, Griffiths RA. Hypercalcemia following vitamin D and thiazide therapy in the elderly. Practitioner 1984;228:312-3.
  7. Parfitt AM. Thiazide-induced hypercalcemia in vitamin D-treated hypoparathyroidism. Ann Intern Med 1972;77:557-63. PubMed
  8. Thiazide diuretics and the risk of osteoporosis. Pharmacist's Letter/Prescriber's Letter 2003;19(11):191105.
  9. Moon J. The role of vitamin D in toxic metal absorption. J Am Coll Nutr 1994;13:559-64.
  10. Demontis R, Reissi D, Noel C, et al. Indirect clinical evidence that 1alphaOH vitamin D<SUB>3</SUB> increases the intestinal absorption of aluminum. Clin Nephrol 1989;31:123-7.
  11. Adler AJ, Berlyne GM. Duodenal aluminum absorption in the rat: effect of vitamin D. Am J Physiol 1985;249:G209-13. PubMed
  12. Schwartz JB. Effects of vitamin D supplementation in atorvastatin-treated patients: A new drug interaction with an unexpected consequence. Clin Pharmacol Ther 2009;85:198-203. PubMed
  13. Dietary reference intakes for calcium and vitamin D. Institute of Medicine, November 30, 2010. Available at: http://www.iom.edu/~/media/Files/Report%20Files/2010/Dietary-Reference-Intakes-for-Calcium-and-Vitamin-D/Vitamin%20D%20and%20Calcium%202010%20Repo
  14. Cox KA, Dunn MA. Aluminum toxicity alters the regulation of calbindin-D28k protein and mRNA expression in chick intestine. J Nutr 2001;131:2007-13. PubMed
  15. Escribano, J., Balaguer, A., Pagone, F., Feliu, A., and Roque, I. Figuls. Pharmacological interventions for preventing complications in idiopathic hypercalciuria. Cochrane.Database.Syst.Rev. 2009;(1):CD004754. PubMed
  16. Carlton, S., Clopton, D., and Cappuzzo, K. A. Vitamin D deficiency: appropriate replenishment therapies and the effects of vitamin D toxicity. Consult Pharm 2010;25(3):171-177. PubMed
  17. Wang, H., Xia, N., Yang, Y., and Peng, D. Q. Influence of vitamin D supplementation on plasma lipid profiles: a meta-analysis of randomized controlled trials. Lipids Health Dis. 2012;11:42. PubMed
  18. Turner AN, Carr Reese P, Fields KS, Anderson J, Ervin M, Davis JA, Fichorova RN, Roberts MW, Klebanoff MA, Jackson RD. A blinded, randomized controlled trial of high-dose vitamin D supplementation to reduce recurrence of bacterial vaginosis. Am J Obstet G PubMed
  19. Weiner M, Epstein FH. Signs and symptoms of electrolyte disorders. Yale J Biol Med. 1970;43(2):76-109.
  20. Lappe J, Watson P, Travers-Gustafson D, Recker R, Garland C, Gorham E, Baggerly K, McDonnell SL. Effect of Vitamin D and Calcium Supplementation on Cancer Incidence in Older Women: A Randomized Clinical Trial. JAMA. 2017 Mar 28;317(12):1234-1243. PubMed
  21. Roth DE, Leung M, Mesfin E, Qamar H, Watterworth J, Papp E. Vitamin D supplementation during pregnancy: state of the evidence from a systematic review of randomised trials. BMJ. 2017;359:j5237. PubMed
  22. Murai IH, Fernandes AL, Sales LP, et al. Effect of a single high dose of vitamin D3 on hospital length of stay in patients with moderate to severe COVID-19: A randomized clinical trial. JAMA. 2021.
  23. Wang Z, Schuetz EG, Xu Y, Thummel KE. Interplay between vitamin D and the drug metabolizing enzyme CYP3A4. J Steroid Biochem Mol Biol 2013;136:54-8. PubMed
  24. Doyle D, Browne U, Brickley A, Murphy D. Vitamin D-induced hypercalcaemia and acute kidney injury in sarcoidosis. BMJ Case Rep 2023;16(1):e250580. PubMed
  25. Williamson A, Martineau AR, Sheikh A, Jolliffe D, Griffiths CJ. Vitamin D for the management of asthma. Cochrane Database Syst Rev 2023;2(2):CD011511. PubMed

See these in context on the Vitamin D monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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