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Dietary supplement

High Potency B6 100 mg Ingredients & Drug Interactions

by Sundown Naturalist

Tablet Or Pill Category: Vitamin
Most serious interaction: Moderate
The interaction bottom line Most serious interaction: Moderate

High Potency B6 100 mg is a dietary supplement by Sundown Naturalist with 1 active ingredient. Its ingredients are commonly taken for morning sickness in pregnancy, premenstrual syndrome (pms), preventing or treating b6 deficiency.Based on those ingredients, 210 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Vitamin B6. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

HelloPharmacist Scorecard of High Potency B6 100 mg by Sundown Naturalist

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

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 1 active ingredient: vitamin B6 (also called pyridoxine) at 100 mg per dose. B6 is a water-soluble vitamin your body needs to make neurotransmitters, break down amino acids, and support immune function.

The tablet also includes inactive ingredients — dicalcium phosphate (a binder), cellulose, croscarmellose (to help the tablet dissolve), silica, and less than 2% of other ingredients — that help form and deliver the dose.

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: supports nervous system health and red blood cell production.
  • We looked for evidence on: Hyperhomocysteinemia, Premenstrual syndrome (PMS), Vitamin B6 deficiency, Carpal tunnel syndrome, Diabetic neuropathy, Isoniazid-induced neuropathy — and 4 related terms.
  • The strongest evidence on file: Vitamin B6 is rated "Effective" for Sideroblastic anemia (Natural Medicines).
  • Also on file: Vitamin B6 is rated "Effective" for Vitamin B6 deficiency, Pyridoxine-dependent epilepsy.
  • Also on file: Vitamin B6 is rated "Likely Effective" for Hyperhomocysteinemia.

Vitamin B6 is effective for treating sideroblastic anemia (a type of blood disorder) and B6 deficiency itself. It's also effective for pyridoxine-dependent epilepsy, a rare seizure condition.

For other uses, the evidence is mixed. It's likely effective for high homocysteine levels (a heart-health concern), and possibly effective for pregnancy-induced nausea and vomiting — though if you're pregnant, use it only under your doctor's guidance.

The evidence, ingredient by ingredient Vitamin B6

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.

At doses under 100 mg daily, vitamin B6 is well tolerated. Side effects are uncommon but may include headache, heartburn, nausea, abdominal pain, or drowsiness.

High doses over time carry a serious risk: nerve damage (sensory neuropathy), which is dose- and duration-dependent. Doses exceeding 1,000 mg daily or cumulative doses of 1,000 grams or more pose the most risk, though neuropathy can occur at lower doses too.

During pregnancy, B6 is likely safe at recommended levels, but possibly unsafe at higher doses — check with your doctor or pharmacist about the right dose for you. It's likely safe while breastfeeding.

Side effects, ingredient by ingredient Vitamin B6

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 B6.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: Parkinson's medications.
  • For scale: 210 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.

Check with your doctor or pharmacist before using this product if you take blood pressure medications, anti-seizure drugs (phenobarbital or phenytoin), amiodarone, or levodopa. All of these have moderate or minor interactions with vitamin B6, and your medications may need adjustment or monitoring.

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.

B6 is a straightforward supplement for deficiency and certain blood disorders, and it's well tolerated at normal doses. However, if you take blood pressure medications, anti-seizure drugs, amiodarone, or levodopa, you'll need to check with your doctor or pharmacist first — the interactions are real and could affect how well your medications work or how low your blood pressure goes.

High-dose, long-term use also risks nerve damage.

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 Aug 24, 2016.

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 High Potency B6 100 mg, straight from the product label.

Brand Sundown Naturalist
Barcode (UPC) 030768000523
Net contents 75 Tablet(s)
Market status On market
Date entered into DSLD Aug 24, 2016
DSLD ID 63625
Product type Vitamin
Supplement form Tablet Or Pill
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar 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 High Potency B6 100 mg by Sundown Naturalist, 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 Tablet(s)
Maximum serving Sizes:
1 Tablet(s)
UPC/BARCODE
030768000523
IngredientAmount% DV
Vitamin B6100 mg5000%

Other ingredients: Dicalcium Phosphate, Cellulose, Croscarmellose, Silica, Contains <2% of

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

100% QUALITY ASSURANCE LABORATORY TESTED

General Statements

Supports Nervous System Health and Red Blood Cell Production*

IMPORTANT FACTS YOU SHOULD KNOW This B Vitamin supports protein and energy metabolism.* Vitamin B-6 also supports nerve function and promotes healthy homocysteine levels already within a normal range.

Quality Guaranteed Lab Tested Laboratory tested to meet strict quality control standards for potency, purity and disintegration. 100% Quality Guaranteed.

Actual Size

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

DIRECTIONS: FOR ADULTS, TAKE ONE (1) TABLET DAILY, PREFERABLY WITH A MEAL.

Formulation

No yeast, wheat, gluten, milk or milk derivatives, lactose, sugar, preservatives, soy, artificial color, artificial flavor, sodium.

Vegetarian Formula

Precautions

WARNING: Not intended for use by pregnant or nursing women. If you are taking any medications or have any medical condition, consult your doctor before use.

Discontinue use and consult your doctor if any adverse reactions occur.

KEEP OUT OF REACH OF CHILDREN.

TAMPER RESISTANT: DO NOT USE IF SEAL UNDER CAP IS BROKEN OR MISSING.

Storage

STORE AT ROOM TEMPERATURE AND AVOID EXCESSIVE HEAT.

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.

General

Prod. No. 54801 00B B54801

Brand IP Statement(s)

2016

Formula

High Potency B6 100 mg

See for yourself

High Potency B6 100 mg by Sundown Naturalist label

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

What’s inside

The Ingredients in High Potency B6 100 mg by Sundown Naturalist

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.

Vitamin B6

Interacts with
210 drugs
100 mg per serving Form: Pyridoxine Hydrochloride

Vitamin B6 (pyridoxine) is an essential water-soluble vitamin that your body needs for metabolism, brain function, and making red blood cells. It is b...

Vitamin B6 monograph & interactions

Other (inactive) ingredients: Dicalcium Phosphate, Cellulose, Croscarmellose, Silica, Contains <2% of. These complete the product’s ingredient list but are not active constituents.

Interaction report

High Potency B6 100 mg by Sundown Naturalist Drug Interactions

Want to check YOUR meds against High Potency B6 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 checker
210Drugs
205 Moderate 5 Minor

Ingredients driving the most interactions

Each ingredient & the kinds of drugs it affects

For each ingredient in High Potency B6 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.

Vitamin B65 drug types · 210 drugs

Amiodarone (Cordarone)

Theoretically, vitamin B6 might increase the photosensitivity caused by amiodarone.
Despite initial case reports suggesting that pyridoxine may have a protective effect against amiodarone-induced photosensitivity, preliminary clinical research suggests that pyridoxine may actually exacerbate this adverse effect.

Likelihood Possible Evidence B
Antihypertensive Drugs

Theoretically, vitamin B6 may have additive effects when used with antihypertensive drugs.
Research in hypertensive rats shows that vitamin B6 can decrease systolic blood pressure. Similarly, clinical research in patients with hypertension shows that taking high doses of vitamin B6 may reduce systolic and diastolic blood pressure, possibly by reducing plasma levels of epinephrine and norepinephrine.

Likelihood Possible Evidence B
Phenobarbital (Luminal)

High doses of vitamin B6 may reduce the levels and clinical effects of phenobarbital.
Preliminary clinical evidence suggests that vitamin B6 200 mg daily can reduce plasma levels of phenobarbital, possibly by increasing metabolism. It is not known whether lower doses have any effect. Advise people taking phenobarbital to avoid high doses of vitamin B6.

Likelihood Possible Evidence D
Phenytoin (Dilantin)

High doses of vitamin B6 may reduce the levels and clinical effects of phenytoin.
Preliminary clinical evidence suggests that vitamin B6 200 mg daily can reduce plasma levels of phenytoin, possibly by increasing metabolism. It is not known whether lower doses have any effect. Advise people taking phenytoin to avoid high doses of vitamin B6.

Likelihood Possible Evidence D
Levodopa

Vitamin B6 may increase the metabolism of levodopa when taken alone, but not when taken in conjunction with carbidopa.
Vitamin B6 (pyridoxine) enhances the metabolism of levodopa, reducing its clinical effects. However, this interaction does not occur when carbidopa is used concurrently with levodopa (Sinemet). Therefore, it is not likely to be a problem in most people.

Likelihood Unlikely Evidence D
The maker

Brand information

Manufacturer and brand details for High Potency B6 100 mg, from the product label.

Sundown Naturalist

See all Sundown Naturalist products
Name
Rexall Sundown, Inc.
City
Boca Raton
State
FL
ZipCode
33487
Phone Number
1-888-848-2435
Pharmacist Counseling Corner

High Potency B6 100 mg by Sundown Naturalist: Common Questions

Does High Potency B6 100 mg by Sundown Naturalist interact with any medications?
Yes. Based on its ingredients, High Potency B6 100 mg has a known interaction with 210 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
High Potency B6 100 mg 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 B6 safe to take during pregnancy?
Vitamin B6 is likely safe at normal recommended doses during pregnancy and is often used for morning sickness — but only under your doctor's guidance. Higher doses are possibly unsafe. Talk with your doctor or pharmacist about the right dose for your situation.
What side effects might I notice?
At 100 mg daily, most people tolerate B6 well. If side effects occur, they're usually mild — headache, heartburn, nausea, or abdominal pain. At much higher doses over time, nerve damage (numbness or tingling) is the main risk.
Can I take this if I have high blood pressure?
If you take blood pressure medication, check with your doctor or pharmacist first. Vitamin B6 may add to your medication's effect and lower your blood pressure further, which isn't always safe.
Will this help with morning sickness?
Vitamin B6 is possibly effective for pregnancy-related nausea and vomiting, and it's often used for this. However, only take it during pregnancy under your doctor's guidance to make sure the dose is right for you.
Does this product have fillers?
Yes — it includes inactive ingredients like dicalcium phosphate, cellulose, croscarmellose, and silica to bind and deliver the B6. Less than 2% of the tablet is other inactive ingredients.

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

Not sure if High Potency B6 100 mg is safe with your meds?

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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.

High Potency B6 100 mg label
Go deeper

The Full Monographs Behind High Potency B6 100 mg’s Ingredients

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

Sources

Sources & How We Checked

High Potency B6 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.

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 32 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 B6 32 references
  1. Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
  2. 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
  3. Geerling BJ, Dagnelie PC, Badart-Smook A, et al. Diet as a risk factor for the development of ulcerative colitis. Am J Gastroenterol 2000;95:1008-13. PubMed
  4. South M. Neonatal seizures after pyridoxine use -- reply. Lancet 1999;354:2083. PubMed
  5. 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
  6. Baxter P, Aicardi J. Neonatal seizures after pyridoxine use. Lancet 1999;354:2082-3. PubMed
  7. Bendich A, Cohen M. Vitamin B6 safety issues. Ann N Y Acad Sci 1990;585:321-30.
  8. Schaumburg H, Kaplan J, Windebank A. Sensory neuropathy from pyridoxine abuse. A new megavitamin syndrome. N Engl J Med 1983;309:445-8. PubMed
  9. Gordon N. Pyridoxine dependency: an update. Dev Med Child Neurol 1997;39:63-5. PubMed
  10. Lewis PJ. Pain in the hand and wrist. Pyridoxine supplements may help patients with carpal tunnel syndrome. BMJ 1995;310:1534. PubMed
  11. Kaufman G. Pyridoxine against amiodarone-induced photosensitivity (letter). Lancet 1984;1:51-2. PubMed
  12. Mulrow JP, Mulrow CD, McKenna WJ. Pyridoxine and amiodarone-induced photosensitivity. Ann Intern Med 1985;103:68-9. PubMed
  13. Kawada A, Kashima A, Shiraishi H, et al. Pyridoxine-induced photosensitivity and hypophosphatasia. Dermatology 2000;201:356-60.. PubMed
  14. Vasile A, Goldberg R, Kornberg B. Pyridoxine toxicity: report of a case. J Am Osteopath Assoc 1984;83:790-1. DOI
  15. Hansson O, Sillanpaa M. Pyridoxine and serum concentration of phenytoin and phenobarbitone. Lancet 1976;1:256. DOI
  16. Jansen T, Romiti R, Kreuter A, Altmeyer P. Rosacea fulminans triggered by high-dose vitamins B6 and B12. J Eur Acad Dermatol Venereol 2001;15:484-5..
  17. Chittumma P, Kaewkiattikun K, Wiriyasiriwach B. Comparison of the effectiveness of ginger and vitamin B6 for treatment of nausea and vomiting in early pregnancy: a randomized double-blind controlled trial. J Med Assoc Thai 2007;90:15-20.
  18. Hatzitolios, A., Iliadis, F., Katsiki, N., and Baltatzi, M. Is the anti-hypertensive effect of dietary supplements via aldehydes reduction evidence based? A systematic review. Clin Exp.Hypertens. 2008;30(7):628-639. PubMed
  19. Vasdev, S., Ford, C. A., Parai, S., Longerich, L., and Gadag, V. Dietary vitamin B6 supplementation attenuates hypertension in spontaneously hypertensive rats. Mol.Cell Biochem. 1999;200(1-2):155-162.
  20. de, Vogel S., Dindore, V., van, Engeland M., Goldbohm, R. A., van den Brandt, P. A., and Weijenberg, M. P. Dietary folate, methionine, riboflavin, and vitamin B-6 and risk of sporadic colorectal cancer. J Nutr 2008;138(12):2372-2378. PubMed
  21. Hagen, I., Nesheim, B. I., and Tuntland, T. No effect of vitamin B-6 against premenstrual tension. A controlled clinical study. Acta Obstet.Gynecol.Scand. 1985;64(8):667-670. PubMed
  22. Aybak, M., Sermet, A., Ayyildiz, M. O., and Karakilcik, A. Z. Effect of oral pyridoxine hydrochloride supplementation on arterial blood pressure in patients with essential hypertension. Arzneimittelforschung. 1995;45(12):1271-1273.
  23. Lal, K. J., Dakshinamurti, K., and Thliveris, J. The effect of vitamin B6 on the systolic blood pressure of rats in various animal models of hypertension. J Hypertens. 1996;14(3):355-363. PubMed
  24. Lauritzen CH, Reuter HD, Repges R, Bohnert K, and Schmidt U. Treatment of premenstrual tension syndrome with Vitex agnus castus. Controlled, double-blind study versus pyridoxine. Phytomed 1997;4(3):183-189. PubMed
  25. Fonseca VA, Lavery LA, Thethi TK, et al. Metanx in type 2 diabetes with peripheral neuropathy: A randomized trial. Am J Med 2013;126(2):141-9. PubMed
  26. Hankey GJ, Eikelboom JW, Yi Q, et al. Treatment with B vitamins and incidence of cancer in patients with previous stroke or transient ischemic attack: Results of a randomized placebo-controlled trial. Stroke 2012;43(6):1572-7. PubMed
  27. Hoyer-Kuhn H, Kohbrok S, Volland R, Franklin J, Hero B, Beck BB, Hoppe B. Vitamin B6 in primary hyperoxaluria I: first prospective trial after 40 years of practice. Clin J Am Soc Nephrol. 2014 Mar;9(3):468-77. PubMed
  28. Mahmoud A, Tabassum S, Al Enazi S, et al. Amelioration of levetiracetam-induced behavioral side effects by pyridoxine. A randomized double blind controlled study. Pediatr Neurol 2021;119:15-21. PubMed
  29. Gupta M, Gallante B, Bamberger JN, et al. Prospective randomized evaluation of idiopathic hyperoxaluria treatments. J Endourol 2021;35(12):1844-1851. PubMed
  30. Li H, Chen M, Liang S, et al. Excessive vitamin B6 during treatment is related to poor prognosis of patients with nasopharyngeal carcinoma: A U-shaped distribution suggests low dose supplement. Clin Nutr 2021;40(4):2293-2300. PubMed
  31. Tanigawa J, Nabatame S, Tominaga K, et al. High-dose pyridoxine treatment for inherited glycosylphosphatidylinositol deficiency. Brain Dev 2021;43(6):680-687. PubMed
  32. Committee on Practice Bulletins-Obstetrics. ACOG Practice Bulletin No. 189: Nausea And Vomiting Of Pregnancy. Obstet Gynecol. 2018;131(1):e15-e30. PubMed

See these in context on the Vitamin B6 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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