Vitamin B-1 250 mg Capsule Ingredients & Drug Interactions
by Vitalbulk
What is this page for?
First and foremost: checking Vitamin B-1 250 mg Capsule 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 B-1 250 mg Capsule is a dietary supplement by Vitalbulk with 1 active ingredient. Its ingredients are commonly taken for preventing or treating thiamine deficiency, beriberi, wernicke-korsakoff syndrome (alcohol-related).Based on those ingredients, 3 medications have a known interaction with it, the most serious rated minor. The ingredients most likely to interact are Thiamine. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Vitamin B-1 250 mg Capsule by Vitalbulk
Ask about any prescription or over-the-counter medication and we check it for interactions with Vitamin B-1 250 mg Capsule by Vitalbulk — 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 B-1 250 mg Capsule by Vitalbulk
Four independent checks of what is known — a summary of the available information, not a grade of the product itself.
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
The stated purpose hasn't been mapped to our evidence data yet.
Why this rating?
- We haven't mapped this product's purpose to our evidence data yet — it'll be graded on the next content refresh.
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.
Only Minor-severity interactions are documented for these ingredients.
Why this rating?
- 1 of the 1 matched ingredient can interact with medications — Thiamine.
- The most serious interaction on file is rated Minor.
- For scale: 3 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.
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.
HelloPharmacist summaryFully disclosed formula with no assessable stated purpose. Only minor medication interactions are documented, and safety information is well characterized.
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Apr 25, 2017.
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 B-1 250 mg Capsule, straight from the product label.
| Brand | Vitalbulk |
|---|---|
| Net contents | 0 Not Present |
| Market status | Off market |
| Date entered into DSLD | Apr 25, 2017 |
| DSLD ID | 72496 |
| Product type | Vitamin |
| Supplement form | Capsule |
| Dietary claims / uses | All Other |
| Intended target group(s) | Adult (18 - 50 Years) |
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 B-1 250 mg Capsule by Vitalbulk, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Thiamine | 250 mg | 16667% |
Other ingredients: Gelatin, Magnesium Stearate, Silicon Dioxide
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.
General Statements
Actual color and size
In case of adverse event: 855-885-2855
General
B1
Seals/Symbols
Certified NonGE Tested
FDA Statement of Identity
Food/Dietary Supplement
Suggested/Recommended/Usage/Directions
Suggested Use: Take one (1) capsule daily with food. Do not exceed recommended daily dose unless directed by your health care practitioner.
Precautions
Do not exceed recommended daily dose unless directed by your health care practitioner.
Keep out of reach of children in a cool, dry place.
Notice: If you are pregnant or nursing, taking medication or planning a surgery, consult your physician before using this product.
If any adverse reactions occur stop taking the product and consult your physician.
This product my be produced in a facility that also makes products containing milk, eggs, fish, crustacean shellfish, tree nuts, wheat, peanuts, and soy.
Food supplements should not be used as a substitute for a varied diet.
Storage
Keep out of reach of children in a cool, dry place.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Vitamin B-1 250 mg Capsule by Vitalbulk 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 B-1 250 mg Capsule by Vitalbulk
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 Capsule(s) Dosage formCapsule Amounts shown are per serving.
Thiamine
Interacts with3 drugs
Thiamine (vitamin B1) is an essential nutrient your body needs to turn food into energy and to keep your nerves and heart healthy. Most people get eno...
Thiamine monograph & interactionsOther (inactive) ingredients: Gelatin, Magnesium Stearate, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.
Vitamin B-1 250 mg Capsule by Vitalbulk Drug Interactions
Vitamin B-1 250 mg Capsule contains a single active ingredient, and it has known interactions with 3 medications. Here’s the picture, then you can look up your own drug.
Want to check YOUR meds against Vitamin B-1 250 mg Capsule?
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 B-1 250 mg Capsule interact with 3 drugs. Click any drug to see the details.
1 of the 1 ingredient in Vitamin B-1 250 mg Capsule interact with drugs. Each result below shows which ingredient is responsible. Thiamine
Sulfadiazine, TrimethoprimCoptin
How Sulfadiazine, Trimethoprim interacts with Vitamin B-1 250 mg Capsule — through 1 ingredient. Tap an ingredient for the detail:
ThiamineTrimethoprim (proloprim) Minor
Interaction Summary
Trimethoprim might increase blood levels of thiamine.
Read the full Thiamine + Sulfadiazine, Trimethoprim interactionSulfamethoxazole, TrimethoprimBactrim, Bactrim DS, Bactrim IV, Cotrim, Cotrim DS, Cotrimix +9 more
How Sulfamethoxazole, Trimethoprim interacts with Vitamin B-1 250 mg Capsule — through 1 ingredient. Tap an ingredient for the detail:
ThiamineTrimethoprim (proloprim) Minor
Interaction Summary
Trimethoprim might increase blood levels of thiamine.
Read the full Thiamine + Sulfamethoxazole, Trimethoprim interactionTrimethoprimProloprim, Trimpex
How Trimethoprim interacts with Vitamin B-1 250 mg Capsule — through 1 ingredient. Tap an ingredient for the detail:
ThiamineTrimethoprim (proloprim) Minor
Interaction Summary
Trimethoprim might increase blood levels of thiamine.
Read the full Thiamine + Trimethoprim interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Vitamin B-1 250 mg Capsule 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.
Thiamine
Trimethoprim (Proloprim)
Trimethoprim might increase blood levels of thiamine.
In vitro, animal, and clinical research suggest that trimethoprim inhibits intestinal thiamine transporter ThTR-2, hepatic transporter OCT1, and renal transporters OCT2, MATE1, and MATE2, resulting in paradoxically increased thiamine plasma concentrations.
Brand information
Manufacturer and brand details for Vitamin B-1 250 mg Capsule, from the product label.
Vitalbulk
- Street Address
- 440 Kings Village Rd
- City
- Scotts Valley
- State
- CA
- ZipCode
- 95066
- Phone Number
- 855-885-2855
Vitamin B-1 250 mg Capsule by Vitalbulk: Common Questions
Does Vitamin B-1 250 mg Capsule by Vitalbulk interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Vitamin B-1 250 mg Capsule 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 B-1 250 mg Capsule’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Vitamin B-1 250 mg Capsule'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 7 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.
Thiamine 7 references
- McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
- 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
- Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (2000). Washington, DC: National Academy Press, 2000. Available at: http://b
- Rogovik, A. L., Vohra, S., and Goldman, R. D. Safety considerations and potential interactions of vitamins: should vitamins be considered drugs? Ann.Pharmacother. 2010;44(2):311-324. PubMed
- Arruti N, Bernedo N, Audicana MT, Villarreal O, Uriel O, Muñoz D. Systemic allergic dermatitis caused by thiamine after iontophoresis. Contact Dermatitis. 2013 Dec;69(6):375-6. PubMed
- Thiamine hydrochloride injection package insert. Lake Zurich, IL: Fresenius Kabi, LLC; September 2019.
- Vora B, Wen A, Yee SW, et al. The Effect of Trimethoprim on Thiamine Absorption: A Transporter-Mediated Drug-Nutrient Interaction. Clin Pharmacol Ther 2023;114(2):381-392.
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