Osfortis Ingredients & Drug Interactions
by BioGaia
What is this page for?
First and foremost: checking Osfortis 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
Osfortis is a dietary supplement by BioGaia with 2 active ingredients. Its ingredients are commonly taken for bone health and osteoporosis, correcting vitamin d deficiency, immune system support.Based on those ingredients, 715 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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HelloPharmacist Scorecard of Osfortis by BioGaia
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
Partial disclosure
Osfortis contains 2 active ingredients: vitamin D and Osfortis itself (for which we hold no interaction data). Vitamin D is a fat-soluble vitamin that your body uses to absorb calcium and maintain bone and immune health.
The product also contains inactive ingredients — maltodextrin, calcium stearate, and hydroxypropyl methylcellulose — which are fillers and binders that help form the capsule.
Does it work?
Strong evidence
Vitamin D is effective for treating familial hypophosphatemia, osteomalacia (soft bones from vitamin D deficiency), renal osteodystrophy (bone disease from kidney failure), rickets (childhood bone disease), and hypoparathyroidism (underactive parathyroid glands). We hold no effectiveness data for the Osfortis ingredient itself in our records.
How safe is it?
Well-documented data
Vitamin D is generally well tolerated at recommended doses. However, very high doses over time can cause vitamin D toxicity, with symptoms of high blood calcium (hypercalcemia) — and rarely, bone loss in adults, slowed growth in children, eye problems, or kidney problems.
During pregnancy and breastfeeding, vitamin D is often used at recommended amounts, but only under your doctor's guidance. Do not take more than advised without talking to your doctor first.
Meds to double-check
Moderate interaction found
Before taking Osfortis, double-check with your pharmacist if you take thiazide diuretics, verapamil, diltiazem, digoxin, atorvastatin, calcipotriene, aluminum-containing antacids, or any medications metabolized by the liver enzyme CYP3A4 — all have Moderate or Minor interactions with vitamin D. The concern centers on high-dose vitamin D raising blood calcium levels or changing how your medications work.
The bottom line
Scorecard at a glancePartially disclosed formula with clinical evidence supporting its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
Osfortis is appropriate if you need vitamin D for conditions like rickets, osteomalacia, or certain parathyroid disorders — especially under medical supervision. If you take heart medications, blood pressure pills, cholesterol drugs, or psoriasis treatments, check with your pharmacist before starting, because vitamin D can interact with several of them.
Stick to recommended doses and have your doctor or pharmacist review your full medication list.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 2 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 Osfortis, straight from the product label.
| Brand | BioGaia |
|---|---|
| Barcode (UPC) | 602359460254 |
| Net contents | 60 Probiotic Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Jun 20, 2024 |
| DSLD ID | 311009 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Dairy 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 Osfortis by BioGaia, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Vitamin D | 10 mcg | 50% |
| Osfortis | 0 NP | -- |
Other ingredients: Maltodextrin, Calcium Stearate, Hydroxypropyl Methylcellulose
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.
Formula
Probiotic capsules with Vitamin D3
BioGaia Osfortis is a dietary supplement containing the patented probiotic Limosilactobacillus reuteri Osfortis (L. reuteri ATCC PTA 6475) and Vitamin D3. Vitamin D contributes to the maintenance of normal bones.
Osfortis with Vitamin D
Brand IP Statement(s)
BioGaia Osfortis is a dietary supplement containing the patented probiotic Limosilactobacillus reuteri Osfortis (L. reuteri ATCC PTA 6475) and Vitamin D3.
BioGaia Groundbreaking probiotics Driven by science
Registered trademarks belong to BioGaia AB. Protected by corresponding patents of US 7,344,867, US 9,968,643 and other issued and pending patent applications.
Formulation
Because L. reuteri Osfortis naturally colonizes humans it has a strong adaptation to persist and interact with humans. L. reuteri Osfortis has been tested in clinical trials and proven effective and safe.
For bone health
Country of origin: Spain.
Clinically proven
Vegan capsules, Non-GMO ingredients, no artificial colors, flavors, dairy or soy.
Milk free Lactose free
Vegan capsules, non-GMO ingredients, no artificial colors, flavors, dairy or soy.
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.
Suggested/Recommended/Usage/Directions
Use: One (1) capsule twice daily, with or without food. Use regularly for bone health.
Storage
Storage: Store in a dry place, at room temperature. Open container should used within one month. Close the cap tightly after each use to reduce moisture.
Precautions
Keep out of reach of children.
To report a serious adverse event, call (888) 485-2135.
Intended for adults.
Recommended daily dose should not be exceeded.
FDA Statement of Identity
Probiotic Supplement
General Statements
BioGaia is a Swedish healthcare company and has been a world leader in research and development of probiotics since 1990.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Osfortis by BioGaia 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 Osfortis by BioGaia
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Servings per container30 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.
Vitamin D
Interacts with715 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,...
Vitamin D monograph & interactionsOsfortis
Other (inactive) ingredients: Maltodextrin, Calcium Stearate, Hydroxypropyl Methylcellulose. These complete the product’s ingredient list but are not active constituents.
Osfortis by BioGaia Drug Interactions
HelloPharmacist Interaction Report
Osfortis by BioGaia contains vitamin D, which has documented interactions with a number of medications.
The most serious concern is with thiazide diuretics (water pills), verapamil, diltiazem, and digoxin — all Moderate severity — because high-dose vitamin D can raise calcium levels in your blood (hypercalcemia), which may reduce how well these heart and blood pressure drugs work or increase the risk of dangerous heart rhythms.
Read the full breakdown — every affected drug type, severity by severity
Vitamin D also interacts Moderately with atorvastatin (a cholesterol drug), calcipotriene (a psoriasis medication), and aluminum-containing products — all through different mechanisms that can reduce drug effectiveness or increase metal absorption. There's also a Minor interaction with a broad class of drugs metabolized by the liver enzyme CYP3A4.
We could not check the ingredient Osfortis itself — interaction data isn't held for it. Altogether, these interactions span 705 individual medications.
Before you start, use the medication checker below to look up your exact prescriptions and over-the-counter drugs. If you take any of the drug types listed here, run them through first.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Osfortis?
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 Osfortis interact with 715 drugs. Click any drug to see the details.
1 of the 2 ingredients in Osfortis interact with drugs. Each result below shows which ingredient is responsible. Vitamin D
Hydrochlorothiazide, ReserpineHydropres, Serpasil-Esidrix, Serpasil-Esidrix #1, Serpasil-Esidrix #2
How Hydrochlorothiazide, Reserpine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Hydrochlorothiazide, Reserpine interactionHydrochlorothiazide, SpironolactoneAldactazide, Aldactide 25, Aldactide 50, Spirozine
How Hydrochlorothiazide, Spironolactone interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Hydrochlorothiazide, Spironolactone interactionHydrochlorothiazide, TimololTimolide
How Hydrochlorothiazide, Timolol interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Hydrochlorothiazide, Timolol interactionHydrochlorothiazide, TriamtereneDyazide, Maxzide, Maxzide-25, Triamzide, Triazide
How Hydrochlorothiazide, Triamterene interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Hydrochlorothiazide, Triamterene interactionHydrochlorothiazide, ValsartanDiovan HCT
How Hydrochlorothiazide, Valsartan interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Hydrochlorothiazide, Valsartan interactionHydroflumethiazideSaluron
How Hydroflumethiazide interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Hydroflumethiazide interactionHydroflumethiazide, ReserpineSalutensin, Salutensin-Demi
How Hydroflumethiazide, Reserpine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Hydroflumethiazide, Reserpine interactionIndapamideLozide, Lozol
How Indapamide interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Indapamide interactionIrbesartan, HydrochlorothiazideCoAprovel
How Irbesartan, Hydrochlorothiazide interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Irbesartan, Hydrochlorothiazide interactionMethyclothiazideAquatensen, Enduron
How Methyclothiazide interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Methyclothiazide interactionMethyclothiazide, PargylineEutron
How Methyclothiazide, Pargyline interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Methyclothiazide, Pargyline interactionMethyclothiazide, ReserpineDiutensen-R
How Methyclothiazide, Reserpine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Methyclothiazide, Reserpine interactionMetolazoneDiulo, Mykrox, Zaroxolyn
How Metolazone interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Metolazone interactionPolythiazideRenese
How Polythiazide interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Polythiazide interactionPolythiazide, PrazosinMinizide
How Polythiazide, Prazosin interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Polythiazide, Prazosin interactionPolythiazide, ReserpineRenese R
How Polythiazide, Reserpine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Polythiazide, Reserpine interactionReserpine, TrichlormethiazideMetatensin #2, Metatensin #4, Naquival
How Reserpine, Trichlormethiazide interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Reserpine, Trichlormethiazide interactionTrandolapril, VerapamilTarka
How Trandolapril, Verapamil interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates, Verapamil (calan, Others) Moderate
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Trandolapril, Verapamil interactionTrichlormethiazideAq 4B Aquazide, Marazide II, Metahydrin, Naqua
How Trichlormethiazide interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DThiazide Diuretics Moderate
Interaction Summary
Theoretically, taking thiazide diuretics and high-dose vitamin D can increase the risk of hypercalcemia.
Read the full Vitamin D + Trichlormethiazide interactionVerapamilCalan, Calan SR, Covera HS, Isoptin, Isoptin SR, Veramil +3 more
How Verapamil interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DVerapamil (calan, Others), Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Hypercalcemia induced by high-dose vitamin D can reduce the therapeutic effects of verapamil for arrhythmia.
Read the full Vitamin D + Verapamil interactionAdo-trastuzumab EmtansineKadcyla
How Ado-trastuzumab Emtansine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Ado-trastuzumab Emtansine interactionAbemaciclibVerzenio
How Abemaciclib interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Abemaciclib interactionAbiraterone
How Abiraterone interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Abiraterone interactionAbiraterone AcetateYonsa, Zytiga
How Abiraterone Acetate interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Abiraterone Acetate interactionAcalabrutinibCalquence
How Acalabrutinib interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Acalabrutinib interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with Osfortis — through 1 ingredient. Tap an ingredient for the detail:
Vitamin DCytochrome P450 3a4 (cyp3a4) Substrates Minor
Interaction Summary
Vitamin D might induce CYP3A4 enzymes and reduce the bioavailability of CYP3A4 substrates.
Read the full Vitamin D + Acetaminophen, Caffeine, Codeine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Osfortis 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 D
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.
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.
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.
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.
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.
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.
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.
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.
Brand information
Manufacturer and brand details for Osfortis, from the product label.
BioGaia
See all BioGaia products- Name
- BioGaia USA
- City
- St. Louis
- State
- MO
- ZipCode
- 63139
- Phone Number
- (877)776-0101
- Web Address
- BioGaiaUSA.com
Osfortis by BioGaia: Common Questions
Does Osfortis by BioGaia interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take Osfortis while pregnant or breastfeeding?
What are the side effects of vitamin D?
Does vitamin D actually work for bone health?
What is vitamin D and why do I need it?
Can I take more vitamin D than the label says?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Osfortis 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 Osfortis’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Osfortis'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 26 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 26 references
- McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
- Tatro DS, ed. Drug Interactions Facts. Facts and Comparisons Inc., St. Louis, MO. 1999.
- 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
- Bar-Or D, Yoel G. Calcium and calciferol antagonize effect of verapamil in atrial fibrillation. Br Med J 1981;282:1585-6.
- 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.
- Crowe M, Wollner L, Griffiths RA. Hypercalcemia following vitamin D and thiazide therapy in the elderly. Practitioner 1984;228:312-3.
- Parfitt AM. Thiazide-induced hypercalcemia in vitamin D-treated hypoparathyroidism. Ann Intern Med 1972;77:557-63. PubMed
- Thiazide diuretics and the risk of osteoporosis. Pharmacist's Letter/Prescriber's Letter 2003;19(11):191105.
- Moon J. The role of vitamin D in toxic metal absorption. J Am Coll Nutr 1994;13:559-64.
- 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.
- Adler AJ, Berlyne GM. Duodenal aluminum absorption in the rat: effect of vitamin D. Am J Physiol 1985;249:G209-13. PubMed
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- Weiner M, Epstein FH. Signs and symptoms of electrolyte disorders. Yale J Biol Med. 1970;43(2):76-109.
- 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
- 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
- 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.
- 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
- 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
- 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
- Kinesya E, Santoso D, Gde Arya N, et al. Vitamin D as adjuvant therapy for diabetic foot ulcers: Systematic review and meta-analysis approach. Clin Nutr ESPEN 2023;54:137-143. PubMed
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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.
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