Vitamin B2 100 mg Ingredients & Drug Interactions
by Country Life
What is this page for?
First and foremost: checking Vitamin B2 100 mg 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
Vitamin B2 100 mg is a dietary supplement by Country Life with 1 active ingredient. Its ingredients are commonly taken for riboflavin deficiency, migraine prevention, general energy and metabolism support.Based on those ingredients, 20 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Riboflavin. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Vitamin B2 100 mg by Country Life
Ask about any prescription or over-the-counter medication and we check it for interactions with Vitamin B2 100 mg by Country Life — 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 Vitamin B2 100 mg by Country Life
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
Full disclosure
This product contains one active ingredient: riboflavin, also called vitamin B2. Riboflavin is a B vitamin your body needs to turn food into energy and keep your cells healthy.
The tablet also contains several inactive ingredients — cellulose, stearic acid, silica, magnesium stearate, and coatings made from glycerin and vegetable glaze — which help hold the tablet together and make it easier to swallow.
Does it work?
Couldn't assess
We don't hold effectiveness data for this product in our records, so we can't tell you from our sources whether the 100 mg dose works for any particular purpose. If you're taking it to correct a riboflavin deficiency or support a specific health goal, talk with your doctor or pharmacist about whether the dose and frequency are right for you.
How safe is it?
Well-documented data
Riboflavin is very well tolerated. Any excess your body doesn't use is removed in your urine — you can't build up a toxic amount.
Common side effects at higher doses include nausea and bright yellow urine (which is harmless and temporary). Rarely, diarrhea has been reported.
If you're pregnant or breastfeeding, riboflavin is needed and is generally safe at standard amounts, but check with your doctor before taking high-dose supplements.
Meds to double-check
Moderate interaction found
If you take tetracycline antibiotics (used for infections and acne), double-check this product before you start — riboflavin may reduce their effectiveness. Use the medication checker on this page to see whether your exact antibiotic is affected.
The bottom line
Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
Vitamin B2 is a straightforward, well-tolerated supplement. The main thing to watch is if you take tetracycline antibiotics — check that interaction first.
Otherwise, it's a good fit for most people, but talk to your pharmacist if you're on any prescription medications or if you're pregnant or nursing and want to use a high-dose supplement.
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 Jul 24, 2019.
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 Vitamin B2 100 mg, straight from the product label.
| Brand | Country Life |
|---|---|
| Barcode (UPC) | 015794060314 |
| Net contents | 100 Tablet(s) |
| Market status | On market |
| Date entered into DSLD | Jul 24, 2019 |
| DSLD ID | 204560 |
| Product type | Vitamin |
| Supplement form | Tablet Or Pill |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Halal, Gluten 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 Vitamin B2 100 mg by Country Life, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Riboflavin | 100 mg | 7692% |
Other ingredients: Cellulose, Stearic Acid, Cellulose Coating, Glycerin Coating, Silica, Magnesium Stearate, Vegetable Glaze
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
Vitamin B2 is beneficial for promoting normal cell function, as well as helping to maintain a healthy nervous system, eyes, and skin. B2 also helps convert carbohydrates, fats and proteins into energy.
Yes Kosher-Parve
Yes Certified Halal by IFANCA
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.
Formulation
Yes Certified gluten-free by GFCO.org
Yes Certified vegan by the AVA
No Yeast, wheat or corn No Soy or milk No Sugar or preservatives No Artificial colors, flavors or sweeteners No GMOs
Certified gluten-free
General Statements
Yes Recyclable packaging Yes Manufacturing supports wind power
Established 1971
Supports healthy eyes & skin Supports energy
Our pledge of integrity Authenticity Cleanliness Freshness Consistency Accuracy
This product has been manufactured at a GMP Registered facility.
Seals/Symbols
Certified B Corporation Certified GF gluten-free Ifanca Certified crescent M Halal K Parve
FDA Statement of Identity
Dietary Supplement
Suggested/Recommended/Usage/Directions
Directions: Adults take one (1) tablet daily with food.
Precautions
As a reminder, discuss the supplements and medications that you take with your health care providers.
Caution: If you are pregnant, nursing, or taking medication, have a medical condition or planning surgery, consult a doctor before using this product.
Stop using and consult a doctor if any adverse reactions occur.
Do not accept if seal is broken.
Keep out of the reach of children.
Storage
Store in a dry place between 59(0)-86(0) F.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Vitamin B2 100 mg by Country Life 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 Vitamin B2 100 mg by Country Life
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Tablet(s) Dosage formTablet Or Pill Amounts shown are per serving.
Riboflavin
Interacts with20 drugs
Riboflavin (vitamin B2) is an essential nutrient your body needs to turn food into energy and to keep skin, eyes, and nerves healthy. It is generally...
Riboflavin monograph & interactionsOther (inactive) ingredients: Cellulose, Stearic Acid, Cellulose Coating, Glycerin Coating, Silica, Magnesium Stearate, Vegetable Glaze. These complete the product’s ingredient list but are not active constituents.
Vitamin B2 100 mg by Country Life Drug Interactions
HelloPharmacist Interaction Report
Vitamin B2 100 mg by Country Life contains riboflavin, which has a documented Moderate interaction with tetracycline antibiotics (a class of prescription antibiotics used for infections and acne).
In vitro research suggests riboflavin may reduce how well these antibiotics work, though this effect hasn't been reported in actual patients yet — it's unclear whether it matters in real life.
Read the full breakdown — every affected drug type, severity by severity
If you take a tetracycline antibiotic, run it through the medication checker below before starting this supplement. Altogether, these interactions span 20 individual medications.
For any other prescriptions or over-the-counter drugs you're on, the tool will flag them too.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Vitamin B2 100 mg?
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 Vitamin B2 100 mg interact with 20 drugs. Click any drug to see the details.
1 of the 1 ingredient in Vitamin B2 100 mg interact with drugs. Each result below shows which ingredient is responsible. Riboflavin
Amphotericin, TetracyclineMysteclin-F
How Amphotericin, Tetracycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Amphotericin, Tetracycline interactionBismuth Subsalicylate, Metronidazole, TetracyclineHelidac
How Bismuth Subsalicylate, Metronidazole, Tetracycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Bismuth Subsalicylate, Metronidazole, Tetracycline interactionChlortetracyclineAureomycin
How Chlortetracycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Chlortetracycline interactionDemeclocyclineDeclomycin
How Demeclocycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Demeclocycline interactionDoripenemDoribax
How Doripenem interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Doripenem interactionDoxycyclineDoryx, Doxy, Doxy-D, Doxycin, Doxycycline Injection, Doxylin +6 more
How Doxycycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Doxycycline interactionDoxycycline HyclateActiclate, Acticlate Cap, Lymepak
How Doxycycline Hyclate interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Doxycycline Hyclate interactionDoxycycline MonohydrateErfacea
How Doxycycline Monohydrate interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Doxycycline Monohydrate interactionDoxycylineDoxychel
How Doxycyline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Doxycyline interactionEravacyclineXerava
How Eravacycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Eravacycline interactionMetronidazole, Tetracyline, Bismuth Subcitrate PotassiumPylera
How Metronidazole, Tetracyline, Bismuth Subcitrate Potassium interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Metronidazole, Tetracyline, Bismuth Subcitrate Potassium interactionMinocyclineAcnamino MR, Aknemin, Amzeeq, Arestin Miscrosperes, Dynacin, Minocin +6 more
How Minocycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Minocycline interactionMinocycline HydrochlorideMinolira, Ximino
How Minocycline Hydrochloride interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Minocycline Hydrochloride interactionOmadacycline (iv)Nuzyra
How Omadacycline (iv) interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Omadacycline (iv) interactionOmadacycline (oral)Nuzyra
How Omadacycline (oral) interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Omadacycline (oral) interactionOxytetracyclineTerramycin
How Oxytetracycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Oxytetracycline interactionOxytetracycline, Phenazopyridine, SulfamethizoleUrobiotic
How Oxytetracycline, Phenazopyridine, Sulfamethizole interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Oxytetracycline, Phenazopyridine, Sulfamethizole interactionRetapamulinAltabax, Altargo
How Retapamulin interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Retapamulin interactionTetracyclineAchromycin, Achromycin V, Nor-Tet, Robitet, Sumycin, Sumycin 250 +6 more
How Tetracycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Tetracycline interactionTigecyclineTygacil
How Tigecycline interacts with Vitamin B2 100 mg — through 1 ingredient. Tap an ingredient for the detail:
RiboflavinTetracycline Antibiotics Moderate
Interaction Summary
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
Read the full Riboflavin + Tigecycline interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Vitamin B2 100 mg 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.
Riboflavin
Tetracycline Antibiotics
Theoretically, taking riboflavin with tetracycline antibiotics may decrease the potency of these antibiotics.
In vitro research suggests that riboflavin may inhibit the potency of tetracycline antibiotics. It is not clear if this effect is clinically significant, as this interaction has not been reported in humans.
Brand information
Manufacturer and brand details for Vitamin B2 100 mg, from the product label.
Country Life
See all Country Life products- Name
- Country Life, LLC
- Street Address
- 180 Vanderbilt Motor Parkway
- City
- Hauppauge
- State
- NY
- ZipCode
- 11788
- Web Address
- CountryLifeVitamins.com
Vitamin B2 100 mg by Country Life: Common Questions
Does Vitamin B2 100 mg by Country Life interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Will this turn my urine yellow?
Is it safe to take while pregnant or breastfeeding?
Can I take this with my other vitamins?
What is riboflavin used for?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Vitamin B2 100 mg 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 Vitamin B2 100 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Vitamin B2 100 mg'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 5 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.
Riboflavin 5 references
- Schoenen J, Jacquy J, Lenaerts M. Effectiveness of high-dose riboflavin in migraine prophylaxis. A randomized controlled trial. Neurology 1998;50:466-70. PubMed
- Yates AA, Schlicker SA, Suitor CW. Dietary reference intakes: The new basis for recommendations for calcium and related nutrients, B vitamins, and choline. J Am Diet Assoc 1998;98:699-706. PubMed
- Leeson LJ, Weidenheimer JF. Stability of tetracycline and riboflavin. J Pharm Sci. 1969;58(3):355-7. PubMed
- MacLennan, S. C., Wade, F. M., Forrest, K. M., Ratanayake, P. D., Fagan, E., and Antony, J. High-dose riboflavin for migraine prophylaxis in children: a double-blind, randomized, placebo-controlled trial. J Child Neurol. 2008;23(11):1300-1304.
- Dietary reference intakes (DRIs): estimated average requirements. Food and Nutrition Board, Institute of Medicine, National Academics. https://www.nal.usda.gov/sites/default/files/fnic_uploads//recommended_intakes_individuals.pdf Accessed July 24, 2017.
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