MK-7 Plus with K1 & MK-4 Ingredients & Drug Interactions
by NOW
What is this page for?
First and foremost: checking MK-7 Plus with K1 & MK-4 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
MK-7 Plus with K1 & MK-4 is a dietary supplement by NOW with 4 active ingredients. Its ingredients are commonly taken for supporting normal blood clotting, bone health, heart and vascular health.Based on those ingredients, 583 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Alfalfa, Powder, Vitamin K1. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against MK-7 Plus with K1 & MK-4 by NOW
Ask about any prescription or over-the-counter medication and we check it for interactions with MK-7 Plus with K1 & MK-4 by NOW — 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 MK-7 Plus with K1 & MK-4 by NOW
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 has 4 active ingredients: three forms of vitamin K—K1, plus two doses of K2—and alfalfa powder. Vitamin K plays a central role in blood clotting and may support bone health.
Alfalfa is a plant source added for its own nutrient profile and traditional uses. The capsule also contains several inactive ingredients—hypromellose, microcrystalline cellulose, maltodextrin, mannitol, silicon dioxide, and medium chain triglyceride—that serve as binders, fillers, and capsule material.
Does it work?
Strong evidence
Vitamin K1 and K2 are both effective for correcting vitamin K deficiency (hypoprothrombinemia), vitamin K-dependent clotting factor deficiency, and managing warfarin-related anticoagulation. Both forms are also possibly effective for osteoporosis support.
Alfalfa, however, has insufficient reliable evidence for us to rate it against any condition—the data we hold does not establish its effectiveness for diabetes, digestive upset, high cholesterol, or menopausal symptoms.
How safe is it?
Well-documented data
Vitamin K taken by mouth is generally well tolerated. The most common side effects are mild gastrointestinal ones: nausea, diarrhea, abdominal pain, and stomach upset.
Serious side effects from oral vitamin K are rare. Alfalfa is also generally well tolerated in food amounts, though supplements carry more risk.
Common alfalfa side effects include abdominal discomfort, diarrhea, flatulence, and loose stools. A rare serious effect is a lupus-like syndrome after long-term use, and dermatitis (skin inflammation) has been reported in individual cases.
Because alfalfa has estrogen-like activity, the safety data advises against it in supplement amounts during pregnancy. For breastfeeding, there isn't enough reliable data to know either way—talk with your doctor or pharmacist for personalized advice.
Meds to double-check
Major interaction found
Do not take this product if you use warfarin (Coumadin) or any blood thinner without talking to your doctor first—vitamin K will work against it. Check with your pharmacist if you take photosensitizing drugs, contraceptive pills, hormone therapy, immunosuppressants, or diabetes medications.
Use the search tool on this page to verify your exact prescriptions.
The bottom line
Scorecard at a glanceFully disclosed formula with clinical evidence supporting its stated purpose. Major medication interactions have been identified, and safety information is well characterized.
This product is built for people who need vitamin K support for clotting or bone health and aren't taking warfarin or other blood thinners. If you're on any prescription medication—especially blood thinners, birth control, hormone therapy, diabetes drugs, immune suppressants, or photosensitizing drugs—run this past your pharmacist before you start.
Alfalfa adds complexity, so a quick check of your medications is wise.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 4 of 4 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Jul 25, 2024.
This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed
General information
Key facts about MK-7 Plus with K1 & MK-4, straight from the product label.
| Brand | NOW |
|---|---|
| Barcode (UPC) | 733739009975 |
| Net contents | 90 Veg Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Jul 25, 2024 |
| DSLD ID | 313777 |
| Product type | Botanical With Nutrients |
| Supplement form | Capsule |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Women (not pregnant or lactating), Gluten Free, Dairy Free |
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.
Supplement Facts
The label details for MK-7 Plus with K1 & MK-4 by NOW, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Vitamin K1 | 120 mcg | 100% |
| Vitamin K2 | 360 mcg | -- |
| Vitamin K2 | 90 mcg | -- |
| Alfalfa, Powder | 135 mg | -- |
Other ingredients: Hypromellose, Microcrystalline Cellulose, Maltodextrin, Mannitol, Silicon Dioxide, Medium Chain Triglyceride
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.
Suggested/Recommended/Usage/Directions
Suggested Usage: Take 1 capsule daily with a meal.
Formula
Vitamin K belongs to a family of fat-soluble compounds that are critical for the proper handling of calcium in the body. Vitamin K is well known for its role in the synthesis of a number of blood coagulation factors and for the formation of strong, healthy bones.
This product is a complete formula with all major forms of the vitamin K family, including vitamin K1 and vitamin K2 (MK-4 and MK-7).
Two Forms of Vitamin K2 + K1
MenaQ7
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.
Precautions
Caution: For adults only.
Do not use if pregnant, nursing, or allergic or contraindicated to aspirin. Consult physician if taking medication (especially blood thinners such as warfarin, Coumadin, heparin and aspirin) or have a medical condition.
Discontinue use two weeks prior to surgery or if stomach upset occurs.
Keep out of reach of children.
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.
Do not use if pregnant, nursing, or allergic or contraindicated to aspirin.
Formulation
Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or sesame ingredients.
Natural color variation may occur in this product.
Supports Bone Health
Cardiovascular Support
Vegetarian/Vegan
Made and quality tested in the USA with globally sourced ingredients.
Storage
Store in a cool, dry place after opening.
FDA Statement of Identity
A Dietary Supplement
General Statements
Vitamins Family owned since 1968.
This bottle is made from 100% PCR (post-consumer recycled) resin.
Seals/Symbols
GMP Quality Assured
Brand IP Statement(s)
MenaQ7 is a registered trademark of NattoPharma ASA, Norway. Patents granted and pending.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
MK-7 Plus with K1 & MK-4 by NOW 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 MK-7 Plus with K1 & MK-4 by NOW
These are the 4 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Veg Capsule(s) Dosage formCapsule 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.
Vitamin K1
Interacts with2 drugs
Vitamin K is an essential nutrient your body needs for normal blood clotting and to support healthy bones. Most people get enough from food, but suppl...
Vitamin K1 monograph & interactionsVitamin K2
Interacts with2 drugs
Vitamin K is an essential nutrient your body needs for normal blood clotting and to support healthy bones. Most people get enough from food, but suppl...
Vitamin K2 monograph & interactionsVitamin K2
Interacts with2 drugs
Vitamin K is an essential nutrient your body needs for normal blood clotting and to support healthy bones. Most people get enough from food, but suppl...
Vitamin K2 monograph & interactionsAlfalfa, Powder
Interacts with583 drugs
Alfalfa is a nutrient-rich legume that people use for high cholesterol, menopause symptoms, and general wellness, but solid human evidence for most of...
Alfalfa, Powder monograph & interactionsOther (inactive) ingredients: Hypromellose, Microcrystalline Cellulose, Maltodextrin, Mannitol, Silicon Dioxide, Medium Chain Triglyceride. These complete the product’s ingredient list but are not active constituents.
MK-7 Plus with K1 & MK-4 by NOW Drug Interactions
HelloPharmacist Interaction Report
MK-7 Plus with K1 & MK-4 by NOW contains three forms of vitamin K—K1, K2, and K2 again—plus alfalfa powder.
The most serious interaction here is Major: all three vitamin K sources can significantly reduce how well warfarin (Coumadin) works. Warfarin thins your blood by interfering with vitamin K, so taking this product can directly reverse that effect and raise your clotting risk.
Read the full breakdown — every affected drug type, severity by severity
Alfalfa also contains vitamin K and carries the same Major interaction with warfarin. Beyond that, alfalfa has Moderate interactions with photosensitizing drugs (sun-sensitive medications), contraceptive pills, hormone therapy, immunosuppressants, and blood sugar medications.
The photosensitivity risk is theoretical but possible; the contraceptive and hormone concerns stem from alfalfa's estrogen-like compounds; the immunosuppressant risk comes from evidence that alfalfa may boost immune activity; and with diabetes drugs, there's a case report of low blood sugar (hypoglycemia) after alfalfa use.
Altogether, these interactions span 577 individual medications. Before you start this product, check your exact medications with the search tool on this page—especially if you take warfarin or any blood thinner, birth control, hormone therapy, immune-suppressing drugs, diabetes medications, or drugs that make you sensitive to sunlight.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against MK-7 Plus with K1 & MK-4?
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 MK-7 Plus with K1 & MK-4 interact with 583 drugs. Click any drug to see the details.
2 of the 4 ingredients in MK-7 Plus with K1 & MK-4 interact with drugs. Each result below shows which ingredient is responsible. Alfalfa, Powder Vitamin K1
WarfarinWarfarin
How Warfarin interacts with MK-7 Plus with K1 & MK-4 — through 2 ingredients. Tap an ingredient for the detail:
Alfalfa, PowderWarfarin (coumadin) Major
Interaction Summary
Theoretically, alfalfa might reduce the anticoagulant activity of warfarin.
Read the full Alfalfa, Powder + Warfarin interactionVitamin K2Warfarin (coumadin) Major
Interaction Summary
Vitamin K can antagonize and reverse the therapeutic effects of warfarin.
Read the full Vitamin K2 + Warfarin interactionWarfarin SodiumCoumadin, Panwarfin, Sofarin
How Warfarin Sodium interacts with MK-7 Plus with K1 & MK-4 — through 2 ingredients. Tap an ingredient for the detail:
Alfalfa, PowderWarfarin (coumadin) Major
Interaction Summary
Theoretically, alfalfa might reduce the anticoagulant activity of warfarin.
Read the full Alfalfa, Powder + Warfarin Sodium interactionVitamin K2Warfarin (coumadin) Major
Interaction Summary
Vitamin K can antagonize and reverse the therapeutic effects of warfarin.
Read the full Vitamin K2 + Warfarin Sodium interaction6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderImmunosuppressants Moderate
Interaction Summary
Theoretically, alfalfa might decrease the efficacy of immunosuppressive therapy.
Read the full Alfalfa, Powder + 6-mercaptopurine interactionAbrocitinibCibinqo
How Abrocitinib interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderImmunosuppressants Moderate
Interaction Summary
Theoretically, alfalfa might decrease the efficacy of immunosuppressive therapy.
Read the full Alfalfa, Powder + Abrocitinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, alfalfa might increase the risk of hypoglycemia when taken with antidiabetes drugs.
Read the full Alfalfa, Powder + Acarbose interactionAcepromazineAtravet
How Acepromazine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acepromazine interactionAcetaminophen, Brompheniramine, PhenylpropanolamineDimetapp Cold and Flu
How Acetaminophen, Brompheniramine, Phenylpropanolamine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Brompheniramine, Phenylpropanolamine interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, SalicylamideRhinogesic GG
How Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylephrineAlka-Seltzer PLUS, Histex SR, Protid
How Acetaminophen, Chlorpheniramine, Phenylephrine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, Phenylephrine, SalicylamideRhinogesic, Rhinogesic JR
How Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylpropanolamineAlumadrine, Conex, Sinadrin Max Strength, Sinulin
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, OpiumHista-Derfule
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, PhenyltoloxamineNorel Plus
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interactionAcetaminophen, Chlorpheniramine, PseudoephedrineAlka-Seltzer PLUS Liquid Gels, Children's Tylenol Cold, Codimal, Comtrex, Extra Strength Tylenol Allergy Sinus, Lorsin +3 more
How Acetaminophen, Chlorpheniramine, Pseudoephedrine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Chlorpheniramine, Pseudoephedrine interactionAcetaminophen, Dexbrompheniramine, PseudoephedrineSinadrin Plus
How Acetaminophen, Dexbrompheniramine, Pseudoephedrine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Dexbrompheniramine, Pseudoephedrine interactionAcetaminophen, DiphenhydramineTylenol PM, Tylenol PM Ex Strength
How Acetaminophen, Diphenhydramine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Diphenhydramine interactionAcetaminophen, Diphenhydramine, PseudoephedrineChildren's Tylenol Allergy, Cold Control, Contac Night Allergy Relief
How Acetaminophen, Diphenhydramine, Pseudoephedrine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Diphenhydramine, Pseudoephedrine interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Ibuprofen interactionAcetaminophen, Phenylephrine, ChlorpheniramineSuper Cold Tabs
How Acetaminophen, Phenylephrine, Chlorpheniramine interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetaminophen, Phenylephrine, Chlorpheniramine interactionAcetazolamideAk-Zol, Diamox
How Acetazolamide interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetazolamide interactionAcetohexamideDymelor
How Acetohexamide interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs, Antidiabetes Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acetohexamide interactionAcitretinSoriatane
How Acitretin interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderPhotosensitizing Drugs Moderate
Interaction Summary
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Read the full Alfalfa, Powder + Acitretin interactionAdalimumabHumira
How Adalimumab interacts with MK-7 Plus with K1 & MK-4 — through 1 ingredient. Tap an ingredient for the detail:
Alfalfa, PowderImmunosuppressants Moderate
Interaction Summary
Theoretically, alfalfa might decrease the efficacy of immunosuppressive therapy.
Read the full Alfalfa, Powder + Adalimumab interactionEach ingredient & the kinds of drugs it affects
For each ingredient in MK-7 Plus with K1 & MK-4 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.
Alfalfa, Powder
Warfarin (Coumadin)
Theoretically, alfalfa might reduce the anticoagulant activity of warfarin.
Alfalfa contains a large amount of vitamin K. This could theoretically interfere with the activity of warfarin.
Antidiabetes Drugs
Theoretically, alfalfa might increase the risk of hypoglycemia when taken with antidiabetes drugs.
Animal research suggests that alfalfa decreases blood sugar in diabetic mice. Also, in one case report, a diabetic patient experienced hypoglycemia after consuming alfalfa extract. Monitor blood glucose levels closely. Dose adjustments might be necessary.
Contraceptive Drugs
Theoretically, alfalfa might interfere with the activity of contraceptive drugs.
Alfalfa contains coumestrol, a phytoestrogen, and isoflavonoids, which have estrogenic effects.
Estrogens
Theoretically, alfalfa might interfere with hormone therapy.
Alfalfa contains coumestrol, a phytoestrogen, and isoflavonoids, which have estrogenic effects.
Immunosuppressants
Theoretically, alfalfa might decrease the efficacy of immunosuppressive therapy.
In vitro research and human case reports suggest that alfalfa may have immunostimulant effects.
Photosensitizing Drugs
Theoretically, concomitant use of alfalfa with photosensitizing drugs might have additive effects.
Animal research suggests that excessive doses of alfalfa may increase photosensitivity, possibly due to its chlorophyll content. It is unclear if this effect would be clinically relevant in humans.
Vitamin K1
Warfarin (Coumadin)
Vitamin K can antagonize and reverse the therapeutic effects of warfarin.
Vitamin K antagonizes the effects of warfarin. Excessive vitamin K intake, either from supplements or from changes in the diet, can reduce the anticoagulant effect of warfarin.
Brand information
Manufacturer and brand details for MK-7 Plus with K1 & MK-4, from the product label.
NOW
See all NOW products- Name
- NOW Foods
- Street Address
- 395 S. Glen Ellyn Rd.
- City
- Bloomingdale
- State
- IL
- ZipCode
- 60108
- Web Address
- nowfoods.com
MK-7 Plus with K1 & MK-4 by NOW: Common Questions
Does MK-7 Plus with K1 & MK-4 by NOW interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Can I take this if I'm on warfarin?
What's the difference between K1, K2, and the alfalfa—why three sources of vitamin K?
Is it safe to take while pregnant?
Can this affect my birth control?
What side effects might I notice?
Can I take this if I'm breastfeeding?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if MK-7 Plus with K1 & MK-4 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.
The Full Monographs Behind MK-7 Plus with K1 & MK-4’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Vitamin K
Interacts with 2 drugsVitamin K is an essential nutrient your body needs for normal blood clotting and to support healthy bones. Most people get enough from food, but supplements are sometimes used for deficiency...
Read the full Vitamin K monograph → Herb & supplement monographAlfalfa
Interacts with 583 drugsAlfalfa is a nutrient-rich legume that people use for high cholesterol, menopause symptoms, and general wellness, but solid human evidence for most of these uses is limited. It is best avoid...
Read the full Alfalfa monograph →Sources & How We Checked
MK-7 Plus with K1 & MK-4'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 43 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 K 11 references
- McEvoy GK, ed. AHFS Drug Information. Bethesda, MD: American Society of Health-System Pharmacists, 1998.
- Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
- Crowther MA, Ageno W, Garcia D, et al. Oral vitamin K versus placebo to correct excessive anticoagulation in patients receiving warfarin: a randomized trial. Ann Intern Med. 2009;150(5):293-300. PubMed
- Dietary vitamin K guidance: an effective strategy for stable control of oral anticoagulation? Nutr Rev. 2010;68(3):178-81. PubMed
- Kim JS, Nafziger AN, Gaedigk A, et al. Effects of oral vitamin K on S- and R-warfarin pharmacokinetics and pharmacodynamics: enhanced safety of warfarin as a CYP2C9 probe. J Clin Pharmacol. 2001 Jul;41(7):715-22. PubMed
- Riegert-Johnson, D. L. and Volcheck, G. W. The incidence of anaphylaxis following intravenous phytonadione (vitamin K1): a 5-year retrospective review. Ann.Allergy Asthma Immunol. 2002;89(4):400-406. PubMed
- Dezee, K. J., Shimeall, W. T., Douglas, K. M., Shumway, N. M., and O'malley, P. G. Treatment of excessive anticoagulation with phytonadione (vitamin K): a meta-analysis. Arch.Intern.Med. 2-27-2006;166(4):391-397. DOI
- Dentali, F., Ageno, W., and Crowther, M. Treatment of coumarin-associated coagulopathy: a systematic review and proposed treatment algorithms. J.Thromb.Haemost. 2006;4(9):1853-1863. PubMed
- Caluwé R, Vandecasteele S, Van Vlem B, Vermeer C, De Vriese AS. Vitamin K2 supplementation in haemodialysis patients: a randomized dose-finding study. Nephrol Dial Transplant. 2014;29(7):1385-90.
- Huang ZB, Wan SL, Lu YJ, Ning L, Liu C, Fan SW. Does vitamin K2 play a role in the prevention and treatment of osteoporosis for postmenopausal women: a meta-analysis of randomized controlled trials. Osteoporos Int. 2015;26(3):1175-86. PubMed
- Hunnali CR, Devi U, Kitchanan S, Sethuraman G. Three Different Regimens for Vitamin K Birth Prophylaxis in Infants Born Preterm: A Randomized Clinical Trial. J Pediatr 2023;255:98-104. PubMed
Alfalfa 32 references
- Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
- The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
- Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
- Kurzer MS, Xu X. Dietary phytoestrogens. Annu Rev Nutr 1997;17:353-81. PubMed
- Farber JM, Carter AO, Varughese PV, et al. Listeriosis traced to the consumption of alfalfa tablets and soft cheese [Letter to the Editor]. N Engl J Med 1990;322:338. PubMed
- Molgaard J, von Schenck H, Olsson AG. Alfalfa seeds lower low density lipoprotein cholesterol and apolipoprotein B concentrations in patients with type II hyperlipoproteinemia. Atherosclerosis 1987;65:173-9. PubMed
- Light TD, Light JA. Acute renal transplant rejection possibly related to herbal medications. Am J Transplant 2003;3:1608-9. PubMed
- Prete PE. The mechanism of action of L-canavanine in inducing autoimmune phenomena. Arthritis Rheum 1985;28:1198-200. PubMed
- Alcocer-Varela J, Iglesias A, Llorente L, Alarcon-Segovia D. Effects of L-canavanine on T cells may explain the induction of systemic lupus erythematosus by alfalfa. Arthritis Rheum 1985;28:52-7. PubMed
- Roberts JL, Hayashi JA. Exacerbation of SLE associated with alfalfa ingestion. N Engl J Med 1983;308:1361. DOI
- Feingold, R. M. Should we fear "health foods"? Arch Intern Med 7-12-1999;159(13):1502. PubMed
- Taormina, P. J., Beuchat, L. R., and Slutsker, L. Infections associated with eating seed sprouts: an international concern. Emerg.Infect.Dis 1999;5(5):626-634. PubMed
- Backer, H. D., Mohle-Boetani, J. C., Werner, S. B., Abbott, S. L., Farrar, J., and Vugia, D. J. High incidence of extra-intestinal infections in a Salmonella Havana outbreak associated with alfalfa sprouts. Public Health Rep. 2000;115(4):339-345. PubMed
- Mohle-Boetani J, Werner B, Polumbo M, and et al. From the Centers for Disease Control and Prevention. Alfalfa sprouts-- Arizona, California, Colorado, and New Mexico, February-April, 2001. JAMA 2-6-2002;287(5):581-582.
- Howard, M. B. and Hutcheson, S. W. Growth dynamics of Salmonella enterica strains on alfalfa sprouts and in waste seed irrigation water. Appl.Environ.Microbiol. 2003;69(1):548-553.
- Winthrop, K. L., Palumbo, M. S., Farrar, J. A., Mohle-Boetani, J. C., Abbott, S., Beatty, M. E., Inami, G., and Werner, S. B. Alfalfa sprouts and Salmonella Kottbus infection: a multistate outbreak following inadequate seed disinfection with heat and chl
- Strapp, C. M., Shearer, A. E., and Joerger, R. D. Survey of retail alfalfa sprouts and mushrooms for the presence of Escherichia coil O157:H7, Salmonella, and Listeria with BAX, and evaluation of this polymerase chain reaction-based system with experimen
- Akaogi, J., Barker, T., Kuroda, Y., Nacionales, D. C., Yamasaki, Y., Stevens, B. R., Reeves, W. H., and Satoh, M. Role of non-protein amino acid L-canavanine in autoimmunity. Autoimmun.Rev 2006;5(6):429-435. PubMed
- Burden and causes of foodborne disease in Australia: Annual report of the OzFoodNet network, 2005. Commun.Dis Intell. 2006;30(3):278-300.
- Shemesh, M., Lindner, H. R., and Ayalon, N. Affinity of rabbit uterine oestradiol receptor for phyto-oestrogens and its use in a competitive protein-binding radioassay for plasma coumestrol. J Reprod.Fertil. 1972;29(1):1-9. PubMed
- Elakovich, S. D. and Hampton, J. M. Analysis of coumestrol, a phytoestrogen, in alfalfa tablets sold for human consumption. J Agric.Food Chem. 1984;32(1):173-175. PubMed
- Malinow, M. R., Bardana, E. J., Jr., Pirofsky, B., Craig, S., and McLaughlin, P. Systemic lupus erythematosus-like syndrome in monkeys fed alfalfa sprouts: role of a nonprotein amino acid. Science 4-23-1982;216(4544):415-417. PubMed
- Malinow, M. R., McLaughlin, P., and Stafford, C. Alfalfa seeds: effects on cholesterol metabolism. Experientia 5-15-1980;36(5):562-564. PubMed
- Farnsworth, N. R. Alfalfa pills and autoimmune diseases. Am J Clin Nutr. 1995;62(5):1026-1028. DOI
- Herbert, V. and Kasdan, T. S. Alfalfa, vitamin E, and autoimmune disorders. Am J Clin Nutr 1994;60(4):639-640.
- Mahon, B. E., Ponka, A., Hall, W. N., Komatsu, K., Dietrich, S. E., Siitonen, A., Cage, G., Hayes, P. S., Lambert-Fair, M. A., Bean, N. H., Griffin, P. M., and Slutsker, L. An international outbreak of Salmonella infections caused by alfalfa sprouts grow
- Gray, A. M. and Flatt, P. R. Pancreatic and extra-pancreatic effects of the traditional anti- diabetic plant, Medicago sativa (lucerne). Br J Nutr. 1997;78(2):325-334.
- Van Beneden, C. A., Keene, W. E., Strang, R. A., Werker, D. H., King, A. S., Mahon, B., Hedberg, K., Bell, A., Kelly, M. T., Balan, V. K., Mac Kenzie, W. R., and Fleming, D. Multinational outbreak of Salmonella enterica serotype Newport infections due to
- Rubenstein AH, Levin NW, and Elliott GA. Manganese-induced hypoglycemia. Lancet 1962;1348-1351.
- Kaufman W. Alfalfa seed dermatitis. JAMA 1954;155(12):1058-1059. PubMed
- Ponka A, Andersson Y, Siitonen A, and et al. Salmonella in alfalfa sprouts. Lancet 1995;345:462-463. PubMed
- Puschner B, Chen X, Read D, Affolter VK. Alfalfa hay induced primary photosensitization in horses. Vet J. 2016 May;211:32-8. PubMed
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