Interactions on record — worth a quick check against your medications. Based on 2 of 3 ingredients. Check your meds →
Dietary supplement

L-Methyl-B6-B12 Ingredients & Drug Interactions

by Virtus Pharmaceuticals

L-Methyl-B6-B12 label
See full label image
Tablet Or Pill Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking L-Methyl-B6-B12 against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

L-Methyl-B6-B12 is a dietary supplement by Virtus Pharmaceuticals with 3 active ingredients. Its ingredients are commonly taken for morning sickness in pregnancy, premenstrual syndrome (pms), preventing or treating b6 deficiency.Based on those ingredients, 230 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Pyridoxal 5-Phosphate, Methylcobalamin. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against L-Methyl-B6-B12 by Virtus Pharmaceuticals

Ask about any prescription or over-the-counter medication and we check it for interactions with L-Methyl-B6-B12 by Virtus Pharmaceuticals — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of L-Methyl-B6-B12 by Virtus Pharmaceuticals

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Aug 13, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 3 of its 3 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

This supplement contains 3 active ingredients: pyridoxal 5-phosphate (the active form of vitamin B6), methylcobalamin (a form of vitamin B12), and L-methylfolate calcium (a form of folate). B6 supports nervous system function and helps your body break down amino acids; B12 is essential for red blood cell and nerve health; and folate supports cell division and DNA synthesis.

The tablet also contains inactive ingredients—fillers and binders like dicalcium phosphate, cellulose, and magnesium stearate, plus colorants (FD&C Blue #2 and Red #40) and a food glaze.

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: dietary management of increased folate nutritional needs.
  • We looked for evidence on: Hyperhomocysteinemia, Pregnancy-induced nausea and vomiting, Premenstrual syndrome (PMS), Peripheral neuropathy, Chemotherapy-induced peripheral neuropathy, Isoniazid-induced neuropathy — and 3 related terms.
  • The strongest evidence on file: Vitamin B12 is rated "Effective" for Vitamin B12 deficiency (Natural Medicines).
  • Also on file: Vitamin B6 is rated "Likely Effective" for Hyperhomocysteinemia.
  • Also on file: Vitamin B12 is rated "Possibly Effective" for Hyperhomocysteinemia.

Vitamin B6 in this form is effective for sideroblastic anemia (a blood disorder) and vitamin B6 deficiency, likely effective for elevated homocysteine (a blood compound linked to heart health), and possibly effective for pregnancy-related nausea. Vitamin B12 is effective for Imerslund-Grasbeck disease (a rare absorption disorder) and B12 deficiency, likely effective for cyanide poisoning, and possibly effective for canker sores and nerve pain after shingles.

We have no effectiveness data on file for L-methylfolate calcium in this product.

The evidence, ingredient by ingredient Vitamin B6 Vitamin B12

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 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Vitamin B6 is well tolerated at doses under 100 mg daily, but high doses over time can damage nerves (sensory neuropathy)—especially doses above 1,000 mg daily. Common side effects at any dose include headache, heartburn, nausea, and loss of appetite.

Vitamin B12 is very safe; your body excretes excess amounts in urine and there's no established upper limit. It's rarely linked to allergic reactions or, in very rare cases when correcting severe anemia, to dangerous drops in potassium levels.

For pregnancy, vitamin B6 is likely safe but also possibly unsafe depending on the dose—discuss timing and amount with your doctor. Both B12 and folate support pregnancy and breastfeeding health at recommended amounts.

Side effects, ingredient by ingredient Vitamin B6 Vitamin B12

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?
  • 2 of the 2 matched ingredients can interact with medications — Vitamin B12, Vitamin B6.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: Parkinson's medications.
  • For scale: 230 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 taking this product if you use blood pressure medications (antihypertensives), amiodarone, phenobarbital, phenytoin, levodopa, or metformin. The B6 content may add to blood pressure lowering, worsen sun sensitivity from amiodarone, reduce seizure medication effectiveness, or interact with Parkinson's and diabetes medications.

B12 may lower levels of metformin's effectiveness.

Check your own medication Run your meds through the checker above

The bottom line

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

This product may help if you have a B6 or B12 deficiency or certain related conditions, but it interacts with blood pressure medications, seizure drugs, heart rhythm medications, and metformin. If you take any prescription medication—especially for blood pressure, seizures, or diabetes—talk with your doctor or pharmacist before starting.

High-dose B6 can damage nerves over time, so stick to recommended amounts unless a doctor advises otherwise.

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

Assessment coverage: 2 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Oct 25, 2013.

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 L-Methyl-B6-B12, straight from the product label.

Brand Virtus Pharmaceuticals
Barcode (UPC) 376439218904
Net contents 90 Tablet(s)
Market status On market
Date entered into DSLD Oct 25, 2013
DSLD ID 22190
Product type Other Combinations
Supplement form Tablet Or Pill
Dietary claims / uses Nutrient, All Other
Intended target group(s) Adult (18 - 50 Years)
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 L-Methyl-B6-B12 by Virtus Pharmaceuticals, 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)
Servings per container
90
UPC/BARCODE
376439218904
IngredientAmount% DV
Pyridoxal 5-Phosphate35 mg--
Methylcobalamin2 mg--
L-Methylfolate Calcium15 mg--

Other ingredients: Dicalcium Phosphate, Microcrystalline Cellulose, FD&C Blue #2, FD&C Red #40, Titanium Dioxide, Modified Cellulose, Croscarmellose Sodium, Stearic Acid, Magnesium Stearate, Silicon Dioxide, Polyethylene Glycol, Food Glaze

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.
Formula

DESCRIPTION: L-Methyl-B6-B12 is an orally administered prescription dietary supplement specifically formulated for the dietary management of patients with unique nutritional needs requiring increased folate levels.

Contains less than 1% d-methylfolate.

Precautions

L-Methyl-B6-B12 should be administered under the supervision of a licensed medical practitioner.

If you are pregnant or nursing a baby, ask a health professional.

KEEP THIS OUT OF REACH OF CHILDREN.

All prescriptions using this product shall be pursuant to state statutes as applicable. This is not an Orange Book product.

Call your medical practitioner about side effects.

- Sulfasalazine: Inhibits the absorption and metabolism of folic acid. - Metformin treatment in patients with type 2 diabetes decreases serum folate. - Warfarin can produce significant impairment in folate status after a 6-month therapy. - Folinic acid may enhance the toxicity of fluorouracil. - Concurrent administration of chloramphenicol and folinic acid in folate-deficient patients may result in antagonism of the haematopoietic response to folate. - Caution should be exercised with the concomitant use of folinic acid and trimethoprim-sulfamethoxazole for the acute treatment of Pneumocystis carinii pneumonia in patients with HIV infection as it is associated with increased rates of treatment failure and mortality in a placebo controlled study. Drugs which may interact with vitamin B12: - Antibiotics, cholestyramine, colchicines, colestipol, metformin, para-aminosalicylic acid, and potassium chloride may decrease the absorption of vitamin B12. - Nitrous oxide can produce a functional vitamin B12 deficiency. Drugs which interact with vitamin B6: - Vitamin B6 should not be given to patients receiving the drug levodopa because the action of levodopa is antagonized by vitamin B6. However, vitamin B6 may be used concurrently in patients receiving a preparation containing both carbidopa and levodopa.

PREGNANCY and NURSING MOTHERS: L-Methyl-B6-B12 is not intended for use as a prenatal/postnatal multivitamin for lactating and non-lactating mothers. This product contains B vitamins in active form. Talk with your medical practitioner before using if pregnant or lactating.

CONTRAINDICATIONS: This product is contraindicated in patients with a known hypersensitivity to any of the ingredients.

WARNINGS: Caution is recommended in patients with a history of bipolar illness. PRECAUTIONS: General: Folate, when administered as a single agent in doses about 0.1 mg daily, may obscure the detection of vitamin B12 deficiency (specifically, the administration of folic acid may reverse the hematological manifestations of B12 deficiency, including pernicious anemia, while not addressing the neurological manifestations). Folate therapy alone is inadequate for treatment of a vitamin B12 deficiency. PATIENT INFORMATION: L-Methyl-B6-B12 is a prescription dietary supplement to be used only under licensed medical supervision.

DRUG INTERACTIONS: Drugs which may interact with folate include: - Antiepileptic drugs (AED): The AED class including, but not limited to, phenytoin, carbamazepine, primidone, valproic acid, fosphenytoin, valproate, phenobarbital and lamotrigine have been shown to impair folate absorption and increase the metabolism of circulating folate. - Additionally, concurrent use of folic acid has been associated with enhanced phenytoin metabolism, lowering the level of the AED in the blood and allowing breakthrough seizures to occur. Caution should be used when prescribing this product among patients who are receiving treatment with phenytoin and other anticonvulsants. - Capecitabine: Folinic acid (5-formyltetrahydrofolate) may increase the toxicity of Capecitabine. - Cholestyramine: Reduces folic acid absorption and reduces serum folate levels. - Colestipol: Reduces folic acid absorption and reduces serum folate levels. - Cycloserine: Reduces folic acid absorption and reduces serum folate levels. - Dihydrofolate Reductase Inhibitors (DHFRI): DHFRIs block the conversion of folic acid to its active forms, and lower plasma and red blood cell folate levels. DHFRIs include aminopterin, methotrexate, pyrimethamine, triamterene, and trimethoprim. - Fluoxetine: Fluoxetine exerts a noncompetitive inhibition of the 5-methyltetrahydrofolate active transport in the intestine. - Isotretinoin: Reduced folate levels have occurred in some patients taking isotretinoin. - L-dopa, triamterene, colchicine, and trimethoprim may decrease plasma folate levels. - Nonsteroidal Anti-inflammatory Drugs (NSAIDs): NSAIDs have been shown to inhibit some folate dependent enzymes in laboratory experiments. NSAIDs include ibuprofen, naproxen, indomethacin and sulindac. - Oral Contraceptives: Serum folate levels may be depressed by oral contraceptive therapy. - Methylprednisolone: Reduced serum folate levels have been noted after treatment with methylprednisolone. - Pancreatic Enzymes: Reduced folate levels have occurred in some patients taking pancreatic extracts, such as pancreatin and pancrelipase. - Pentamidine: Reduced folate levels have been seen with prolonged intravenous pentamidine. - Pyrimethamine: High levels of folic acid may result in decreased serum levels of pyrimethamine.

ADVERSE REACTIONS: Allergic sensitization has been reported following both oral and parental administration of folic acid, and may possibly occur with other forms of folate. Paresthesia, somnolence, nausea and headaches have been reported with vitamin B6. Mild transient diarrhea, polycythemia vera, itching, transitory exanthema and the feeling of swelling of the entire body have been associated with vitamin B12.

Call your medical practitioner about side effects.

- Smoking and Alcohol: Reduced serum folate levels have been noted.

KEEP THIS OUT OF THE REACH OF CHILDREN.

General Statements

Each coated, round, purple tablet contains the following dietary ingredients:

Made in U.S.A.

Dispense in a tight, light-resistant container.

NDC* 76439-218-90 *see insert for more information on NDCs.

N

Lot No: Exp Date:

Rev. 12/2012

HOW SUPPLIED: L-Methyl-B6-B12 tablets are coated, round, purple tablets debossed with "BP 0.3" on top and a bisect on bottom, and are supplied in bottles of 90 tablets and 500 tablets. NDC` 76439-218-90 (90 ct. bottle / 90 tablets) NDC` 76439-218-50 (500 ct. bottle / 500 tablets) `This product is a dietary supplement that – due to increased folate levels (AUG 2 1973 FR 20750), requires an Rx on the label because of increased risk associated with masking of B12 deficiency. As such, this product requires licensed medical supervision, an Rx status, and a National Drug Code (NDC) as required by pedigree reporting requirements.

FOLATE REGULATION: The term "folate" are B vitamins that include folic acid and any forms of active pteroylglutamates regardless of the reduction state of the molecule. Folates, or vitamin B9, are primarily hydrolyzed in the intestinal jejunum and the liver to the active circulating form of folate, l-methylfolate, with an intermediate stable form, 5,10-methylenetetrahydrofolate. Individuals with genetic polymorphisms for the genes coding methylenetetrahydrofolate reductase (MTHFR) may not be capable of utilizing or metabolizing folic acid adequately for the vitamin B12 dependent methylation cycle. Folic acid, including reduced forms* such as folinic acid, may obscure pernicious anemia above 0.1 mg doses, and must be administered under the supervision of a licensed medical practitioner. The 1971, 1972, 1973, 1980, 1984, 2000, and 2010 Federal Register Notices addressed this concern while establishing that increased folate was proper therapy in megaloblastic anemias - specifically where homocysteine levels were elevated or risk of neural tube defects (NTDs) was at issue. The Federal Register Notice of August 2, 1973 (38 FR 20750) specifically states that: Dietary supplement preparations are available without a prescription (21 CFR 121.1134). Levels higher than dietary supplement amounts are available only with a prescription. *It is not known whether or not l-methylfolate can obscure pernicious anemia above 0.1 mg doses, so caution is advised also with this form of folate. Folic acid - including reduced forms, may be added to medical foods as defined in section 5(b)(3) of the Orphan Drug Act (21 USC 360ee(b)(3)), or to food (21 CFR 172.345).

MADE IN USA

Tablets

FDA Statement of Identity

Prescription Dietary Supplement

Rx

Rx Prescription Dietary Supplement

Suggested/Recommended/Usage/Directions

DOSAGE AND ADMINISTRATION: One tablet twice daily or as directed by a licensed medical practitioner.

INDICATIONS AND USAGE: L-Methyl-B6-B12 is indicated for the distinct nutritional requirements of patients in need of dietary supplementation as determined by a licensed medical practitioner. L-Methyl-B6-B12 should be administered under the supervision of a licensed medical practitioner.

DOSAGE AND ADMINISTRATION: One tablet twice daily or as directed by a licensed medical practitioner.

Storage

Store at controlled room temperature 15(0)-30(0)C (59(0)-86(0)F). [See USP]. Protect from light and moisture.

STORAGE: Store at Controlled Room Temperature 15(0)-30(0)C (59(0)-86(0)F). [See USP]. Protect from light and moisture. Dispense in a tight, light-resistant container.

General

Rev. 1/2012

Seals/Symbols

V Virtus PHARMACEUTICALS

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

See for yourself

L-Methyl-B6-B12 by Virtus Pharmaceuticals label

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

L-Methyl-B6-B12 label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in L-Methyl-B6-B12 by Virtus Pharmaceuticals

These are the 3 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Tablet(s) Dosage formTablet Or Pill Servings per container90 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.

Pyridoxal 5-Phosphate

Interacts with
210 drugs
35 mg per serving

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...

Pyridoxal 5-Phosphate monograph & interactions

Methylcobalamin

Interacts with
20 drugs
2 mg per serving

Vitamin B12 (cobalamin) is an essential nutrient your body needs to make red blood cells, keep nerves healthy, and support DNA. Supplements are very h...

Methylcobalamin monograph & interactions

L-Methylfolate Calcium

15 mg per serving Form: 6(S)-5-MTHF-Ca

Other (inactive) ingredients: Dicalcium Phosphate, Microcrystalline Cellulose, FD&C Blue #2, FD&C Red #40, Titanium Dioxide, Modified Cellulose, Croscarmellose Sodium, Stearic Acid, Magnesium Stearate, Silicon Dioxide, Polyethylene Glycol, Food Glaze. These complete the product’s ingredient list but are not active constituents.

Interaction report

L-Methyl-B6-B12 by Virtus Pharmaceuticals Drug Interactions

Want to check YOUR meds against L-Methyl-B6-B12?

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
230Drugs
205 Moderate 25 Minor

Ingredients driving the most interactions

Pyridoxal 5-Phosphate 210
Methylcobalamin 20

Individual Drug Interactions

The ingredients in L-Methyl-B6-B12 interact with 230 drugs. Click any drug to see the details.

2 of the 3 ingredients in L-Methyl-B6-B12 interact with drugs. Each result below shows which ingredient is responsible. Pyridoxal 5-Phosphate Methylcobalamin

Each ingredient & the kinds of drugs it affects

For each ingredient in L-Methyl-B6-B12 with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Pyridoxal 5-Phosphate5 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
Pyridoxal 5-Phosphate full monograph & interactions

Methylcobalamin1 drug type · 20 drugs

Metformin (Glucophage)

Metformin, a common medication used to manage type 2 diabetes, has been associated with lower vitamin B12 levels in some individuals. Prolonged use of metformin can interfere with the absorption of B12 in the digestive system, potentially leading to a deficiency in this essential vitamin.

Likelihood Possible Evidence A
Methylcobalamin full monograph & interactions
The maker

Brand information

Manufacturer and brand details for L-Methyl-B6-B12, from the product label.

Virtus Pharmaceuticals

See all Virtus Pharmaceuticals products
Name
Virtus Pharmaceuticals, LLC
City
Tampa
State
FL
ZipCode
33619
Pharmacist Counseling Corner

L-Methyl-B6-B12 by Virtus Pharmaceuticals: Common Questions

Does L-Methyl-B6-B12 by Virtus Pharmaceuticals interact with any medications?
Yes. Based on its ingredients, L-Methyl-B6-B12 has a known interaction with 230 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
L-Methyl-B6-B12 contains 3 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is this safe to take during pregnancy?
Vitamin B6 is likely safe at recommended doses for pregnancy-related nausea, but some data suggests it may be unsafe at higher doses—there's conflicting evidence. Vitamin B12 is considered likely safe in pregnancy. Because the safety picture is mixed, especially for B6, talk with your doctor about the right dose and timing for your situation.
Can I take this if I'm breastfeeding?
Yes, both vitamin B6 and B12 are considered likely safe during breastfeeding at recommended amounts. In fact, B12 is important for breastfeeding infants. Follow your provider's guidance on dosage.
What's the difference between the B12 in this product and other B12 supplements?
This product contains methylcobalamin, which is one active form of vitamin B12. Other supplements may use cyanocobalamin or other forms. Methylcobalamin is already in a form your body can use directly, though all B12 forms work for treating deficiency and are generally well-tolerated.
Can high doses of B6 hurt me?
Yes. Doses over 1,000 mg daily pose the most risk of nerve damage (sensory neuropathy), but it can happen at lower doses too, especially with long-term use. Stick to recommended amounts unless a doctor tells you otherwise.
What is L-methylfolate calcium?
It's a form of folate (vitamin B9) that your body can use directly. Folate supports cell division and DNA health. We have no specific effectiveness or safety data on file for this ingredient in our monograph, so ask your pharmacist if you have questions about it.

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

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Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

L-Methyl-B6-B12 label
Go deeper

The Full Monographs Behind L-Methyl-B6-B12’s Ingredients

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

Herb & supplement monograph

Vitamin B6

Interacts with 210 drugs

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

Read the full Vitamin B6 monograph → Herb & supplement monograph

Vitamin B12

Interacts with 20 drugs

Vitamin B12 (cobalamin) is an essential nutrient your body needs to make red blood cells, keep nerves healthy, and support DNA. Supplements are very helpful for people who are deficient — su...

Read the full Vitamin B12 monograph →
Sources

Sources & How We Checked

L-Methyl-B6-B12'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 62 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
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Vitamin B12 30 references
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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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