Interactions on record — worth a quick check against your medications. Based on 3 of 4 ingredients. Check your meds →
Dietary supplement

Chewable CoQ10 200 mg Ingredients & Drug Interactions

by NOW

Chewable CoQ10 200 mg label
See full label image
Lozenge Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Chewable CoQ10 200 mg against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

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

The interaction bottom line Most serious interaction: Moderate

Chewable CoQ10 200 mg is a dietary supplement by NOW with 4 active ingredients. Its ingredients are commonly taken for general antioxidant support, skin and hair care, heart health.Based on those ingredients, 902 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Vitamin E, Coenzyme Q10. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Chewable CoQ10 200 mg by NOW

Ask about any prescription or over-the-counter medication and we check it for interactions with Chewable CoQ10 200 mg by NOW — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Chewable CoQ10 200 mg 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.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 12, 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 product contains three active ingredients. Coenzyme Q10 is the main ingredient at 200 mg per lozenge — a compound your cells use for energy production.

Vitamin E is included as an antioxidant. Non-GMO soy lecithin rounds out the formula.

The remaining ingredients are inactive: fructose, cellulose, sorbitol, stearic acid, silica, magnesium stearate, citric acid, and natural orange flavor.

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: cellular energy production and heart health.
  • We looked for evidence on: Coenzyme Q10 deficiency, Cardiovascular disease (CVD), Congestive heart failure (CHF), Angina, Atherosclerosis, Hyperlipidemia — and 4 related terms.
  • The strongest evidence on file: Coenzyme Q10 is rated "Likely Effective" for Coenzyme Q10 deficiency (Natural Medicines).
  • Also on file: Coenzyme Q10 is rated "Possibly Effective" for Congestive heart failure (CHF).
  • Also on file: Coenzyme Q10 is rated "Possibly Ineffective" for Chemotherapy-related fatigue.

The evidence is strongest for CoQ10 in treating CoQ10 deficiency itself — that's rated Effective. For other uses like fibromyalgia, migraine headache, heart failure, and diabetic nerve damage, CoQ10 is rated Possibly Effective, meaning some clinical evidence supports its use but it's not ironclad.

Vitamin E shows solid evidence for treating vitamin E deficiency and a rare genetic condition called AVED (ataxia with vitamin E deficiency); it's Possibly Effective for Alzheimer's disease and a few other conditions. Non-GMO soy lecithin's effectiveness is not well established in the data we hold — it's rated Likely Ineffective for Alzheimer's and has Insufficient Evidence for most other uses.

The evidence, ingredient by ingredient Vitamin E Lecithin Coenzyme Q10

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 3 of the 3 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 3 of 3.
  • General safety write-ups exist for 3 of 3.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Coenzyme Q10 is generally well tolerated. Minor gastrointestinal side effects like nausea, diarrhea, and heartburn occur in less than 1% of people.

Headache, dizziness, and insomnia have been reported in studies, though rarely. Non-GMO soy lecithin is also well tolerated orally, though it can cause abdominal pain, diarrhea, fullness, and nausea in some people.

If you have a soy or egg allergy, lecithin may trigger an allergic skin reaction. Vitamin E at usual dietary amounts is safe, but high-dose long-term supplements — especially those exceeding 400 IU daily — can raise the risk of bleeding.

High doses also carry a rare risk of hemorrhagic stroke. If you're pregnant, food amounts and prenatal vitamins are fine, but avoid high-dose vitamin E supplements unless your doctor directs otherwise.

For breastfeeding, normal dietary amounts are safe, but check with your doctor before taking high-dose supplements.

Side effects, ingredient by ingredient Vitamin E Lecithin Coenzyme Q10

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 3 matched ingredients can interact with medications — Coenzyme Q10, Vitamin E.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; cancer treatments.
  • For scale: 903 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 pharmacist before using this product if you take blood thinners or antiplatelet drugs (like warfarin, aspirin, or clopidogrel) — Moderate severity interaction. If you're on chemotherapy drugs that work through oxidative stress (alkylating agents or antitumor antibiotics), discuss it first — Moderate severity.

Blood pressure medications warrant a conversation too, as CoQ10 may add to their effect — Minor severity. Also mention this product if you take niacin or any medication processed by your liver's CYP3A4 enzyme system.

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 is a reasonable choice if you're looking to supplement CoQ10 for CoQ10 deficiency, heart-related concerns, migraines, or fibromyalgia, and you don't take blood thinners or certain chemotherapy drugs. If you're on warfarin, any anticoagulant or antiplatelet medication, or chemotherapy, talk to your pharmacist or doctor first — the interactions are real and worth discussing.

Anyone with a soy allergy should avoid it due to the lecithin content.

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

Assessment coverage: 3 of 3 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Mar 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 Chewable CoQ10 200 mg, straight from the product label.

Brand NOW
Barcode (UPC) 733739031969
Net contents 30 Lozenge(s)
Market status On market
Date entered into DSLD Mar 24, 2016
DSLD ID 57240
Product type Other Combinations
Supplement form Lozenge
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy 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 Chewable CoQ10 200 mg by NOW, 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 Lozenge(s)
Maximum serving Sizes:
1 Lozenge(s)
UPC/BARCODE
733739031969
IngredientAmount% DV
Calories10 {Calories}--
Total Carbohydrates2 Gram(s)1%
Sugar1 Gram(s)--
Vitamin E100 IU333%
non-GMO Soy Lecithin50 mg--
Coenzyme Q10200 mg--

Other ingredients: Fructose, Cellulose, Sorbitol, Stearic Acid, Silica, Magnesium Stearate, Citric Acid, natural Orange flavor

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.
Suggested/Recommended/Usage/Directions

Suggested Usage: Chew 1 lozenge daily with a fat-containing meal.

General Statements

Coenzyme Q10 (CoQ10) is a vitamin-like compound that plays a central role in cellular energy production.* CoQ10 is found throughout the body, but is especially concentrated in the heart, liver, and kidney and production has been found to decline with age. CoQ10 works with vitamin E as a potent free radical scavenger in cell membranes, as well as within blood vessels.* Years of scientific research have shown that CoQ10 helps to maintain a healthy heart and vascular system.*

Cardiovascular Health*

~ Supports Energy Production*

General Health

Family owned since 1968.

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.

Brand IP Statement(s)

NOW CoQ10 is Pharmaceutical Grade.

Formula

NOW CoQ10 products contain only the natural, all-trans form of CoQ10 produced by fermentation.

~ With Vitamin E & Lecithin

Precautions

Caution: For adults only.

Consult physician if pregnant/nursing, taking medication, or have a medical condition.

Keep out of reach of children.

Not manufactured with wheat, gluten, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Storage

Store in a cool, dry place after opening.

General

CODE 3196 V2

FDA Statement of Identity

A Dietary Supplement

Formulation

Vegetarian/Vegan

Not manufactured with wheat, gluten, milk, egg, fish, shellfish or tree nut ingredients.

Seals/Symbols

GMP QUALITY ASSURED

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

See for yourself

Chewable CoQ10 200 mg by NOW label

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

Chewable CoQ10 200 mg 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 Chewable CoQ10 200 mg by NOW

These are the 4 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Lozenge(s) Dosage formLozenge 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.

Sugar

1 Gram(s) per serving

Vitamin E

Interacts with
764 drugs
100 IU per serving Form: D-Alpha-Tocopheryl Succinate

Vitamin E is an essential fat-soluble vitamin and antioxidant that most people get in adequate amounts from a normal diet. Supplements can help correc...

Vitamin E monograph & interactions

Non-GMO Soy Lecithin

No known
interactions
50 mg per serving

Lecithin is a natural fatty substance found in foods and made by the body that is widely used as a supplement and food emulsifier. Evidence supporting...

Non-GMO Soy Lecithin monograph & interactions

Coenzyme Q10

Interacts with
198 drugs
200 mg per serving

CoQ10 is a vitamin-like substance your body makes naturally that helps cells produce energy and acts as an antioxidant. It is generally well tolerated...

Coenzyme Q10 monograph & interactions

Other (inactive) ingredients: Fructose, Cellulose, Sorbitol, Stearic Acid, Silica, Magnesium Stearate, Citric Acid, Natural Orange flavor. These complete the product’s ingredient list but are not active constituents.

Interaction report

Chewable CoQ10 200 mg by NOW Drug Interactions

Want to check YOUR meds against Chewable CoQ10 200 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
902Drugs
763 Moderate 139 Minor

Ingredients driving the most interactions

Vitamin E 764
Coenzyme Q10 198

Individual Drug Interactions

The ingredients in Chewable CoQ10 200 mg interact with 902 drugs. Click any drug to see the details.

2 of the 4 ingredients in Chewable CoQ10 200 mg interact with drugs. Each result below shows which ingredient is responsible. Vitamin E Coenzyme Q10

Each ingredient & the kinds of drugs it affects

For each ingredient in Chewable CoQ10 200 mg 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.

Vitamin E8 drug types · 764 drugs

Alkylating Agents

Theoretically, antioxidant effects of vitamin E might reduce the effectiveness of alkylating agents.
There's concern that antioxidants could reduce the activity of chemotherapy drugs which generate free radicals, such as cyclophosphamide, chlorambucil, carmustine, busulfan, and thiotepa. However, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that might interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as vitamin E have on chemotherapy. Advise patients to consult their oncologist before using vitamin E supplements, especially in high doses.

Likelihood Possible Evidence D
Anticoagulant/Antiplatelet Drugs

Concomitant use of vitamin E and anticoagulant or antiplatelet agents might increase the risk of bleeding.
Vitamin E seems to inhibit of platelet aggregation and antagonize the effects of vitamin K-dependent clotting factors. These effects appear to be dose-dependent, and are probably only likely to be clinically significant with doses of at least 800 units daily. Mixed tocopherols, such as those found in food, might have a greater antiplatelet effect than alpha-tocopherol. RRR alpha-tocopherol (natural vitamin E) 1000 IU daily antagonizes vitamin K-dependent clotting factors. Advise patients to avoid high doses of vitamin E, especially in people with low vitamin K intake or other risk factors for bleeding.

Likelihood Possible Evidence B
Antitumor Antibiotics

Theoretically, antioxidant effects of vitamin E might reduce the effectiveness of antitumor antibiotics.
There's concern that antioxidants could reduce the activity of antitumor antibiotic drugs such as doxorubicin, which generate free radicals. However, some researchers theorize that antioxidants might make chemotherapy more effective by reducing oxidative stress that might interfere with apoptosis (cell death) of cancer cells. More evidence is needed to determine what effect, if any, antioxidants such as vitamin E have on chemotherapy involving antitumor antibiotics. Advise patients to consult their oncologist before using vitamin E supplements, especially in high doses.

Likelihood Possible Evidence D
Cyclosporine (Neoral, Sandimmune)

A specific form of vitamin E might increase absorption and levels of cyclosporine.
There is some evidence that one specific formulation of vitamin E (D-alpha-tocopheryl-polyethylene glycol-1000 succinate, TPGS, tocophersolan, Liqui-E) might increase absorption of cyclosporine. This vitamin E formulation forms micelles which seems to increase absorption of cyclosporine by 40% to 72% in some patients. However, this interaction is unlikely to occur with the usual forms of vitamin E.

Likelihood Unlikely Evidence B
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, vitamin E might induce metabolism of CYP3A4, possibly reducing the levels CYP3A4 substrates.
Vitamin E appears to bind with the nuclear receptor, pregnane X receptor (PXR), which results in increased expression of CYP3A4. Although the clinical significance of this is not known, use caution when considering concomitant use of vitamin E and other drugs affected by these enzymes.

Likelihood Possible Evidence D
Selumetinib (Koselugo)

Taking selumetinib with vitamin E can result in a total daily dose of vitamin E that exceeds safe limits and therefore might increase the risk of bleeding.
Selumetinib contains 48-54 IU vitamin E per capsule. The increased risk of bleeding with vitamin E appears to be dose-dependent. Be cautious when using selumetinib in combination with supplemental vitamin E, especially in patients at higher risk of bleed, such as those with chronic conditions and those taking antiplatelet drugs.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Using vitamin E with warfarin might increase the risk of bleeding.
Due to interference with production of vitamin K-dependent clotting factors, use of more than 400 IU of vitamin E daily with warfarin might increase prothrombin time (PT), INR, and the risk of bleeding,. At a dose of 1000 IU per day, vitamin E can antagonize vitamin K-dependent clotting factors even in people not taking warfarin. Limited clinical evidence suggests that doses up to 1200 IU daily may be used safely by patients taking warfarin, but this may not be applicable in all patient populations.

Likelihood Possible Evidence B
Niacin

Vitamin E might decrease the beneficial effects of niacin on high-density lipoprotein (HDL) cholesterol levels.
A combination of niacin and simvastatin (Zocor) effectively raises high-density lipoprotein (HDL) cholesterol levels in people with coronary disease and low HDL levels. Clinical research shows that taking a combination of antioxidants (vitamin C, vitamin E, beta-carotene, and selenium) along with niacin and simvastatin (Zocor) attenuates this rise in HDL, specifically the HDL-2 and apolipoprotein A1 fractions, by more than 50%. Vitamin E alone combined with a statin does not seem to decrease HDL levels. It is not known whether the adverse effect on HDL is due to one of the other antioxidants or to the combination. It also is not known whether it will occur in other patient populations.

Likelihood Possible Evidence A
Vitamin E full monograph & interactions

Coenzyme Q103 drug types · 198 drugs

Alkylating Agents

Coenzyme Q10 has antioxidant effects. Theoretically, this may reduce the activity of chemotherapy drugs that generate free radicals.
Theoretically, antioxidants such as coenzyme Q10 might protect tumor cells from chemotherapeutic agents that work by inducing oxidative stress, such as alkylating agents (e.g., cyclophosphamide) and radiation therapy. The clinical importance of this interaction is unknown.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Coenzyme Q10 is chemically similar to menaquinone and might have vitamin K-like procoagulant effects, which could decrease the effects of warfarin.
Concomitant use of coenzyme Q10 and warfarin might reduce the anticoagulant effects of warfarin. Four cases of decreased warfarin efficacy thought to be due to coenzyme Q10 have been reported. However, there is some preliminary clinical research that suggests coenzyme Q10 might not significantly decrease the effects of warfarin in patients who have a stable INR.

Likelihood Possible Evidence D
Antihypertensive Drugs

Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Some clinical research shows that coenzyme Q10 can significantly lower blood pressure, although other studies have shown conflicting results.

Likelihood Possible Evidence B
Coenzyme Q10 full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Chewable CoQ10 200 mg, 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
Pharmacist Counseling Corner

Chewable CoQ10 200 mg by NOW: Common Questions

Does Chewable CoQ10 200 mg by NOW interact with any medications?
Yes. Based on its ingredients, Chewable CoQ10 200 mg has a known interaction with 902 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Chewable CoQ10 200 mg contains 4 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.
Does this product actually work for CoQ10 deficiency?
Yes. Coenzyme Q10 is rated Effective for treating CoQ10 deficiency specifically. For other conditions like heart failure or migraines, the evidence is Possibly Effective — meaning some research supports it, but it's not a proven cure.
Can I take this if I have a soy allergy?
No. This product contains non-GMO soy lecithin, which can trigger allergic skin reactions in people with soy allergies. Skip it and look for an alternative CoQ10 product.
What side effects might I experience?
Most people tolerate it well. Gastrointestinal complaints like nausea, diarrhea, and heartburn are the most common but rare, occurring in less than 1% of users. Headache, dizziness, and insomnia have been reported in clinical studies. If you notice abdominal discomfort, stop and talk to us.
Is this safe during pregnancy?
CoQ10 safety data in pregnancy isn't complete — the facts we have don't give us a clear rating. Soy lecithin is Likely Safe. For vitamin E, food amounts and prenatal vitamins are fine, but avoid high-dose supplements unless your doctor says it's okay. Talk to your OB or pharmacist about whether this product is right for you.
Can I take this while breastfeeding?
Soy lecithin is Likely Safe and often recommended for clogged ducts, though check with your doctor first. Vitamin E in normal dietary amounts is fine. CoQ10 safety while breastfeeding hasn't been well studied — discuss it with your healthcare provider before use.

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

Not sure if Chewable CoQ10 200 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.

Chewable CoQ10 200 mg label
Go deeper

The Full Monographs Behind Chewable CoQ10 200 mg’s Ingredients

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

Herb & supplement monograph

Vitamin E

Interacts with 764 drugs

Vitamin E is an essential fat-soluble vitamin and antioxidant that most people get in adequate amounts from a normal diet. Supplements can help correct a true deficiency, but high-dose vitam...

Read the full Vitamin E monograph → Herb & supplement monograph

Lecithin

Lecithin is a natural fatty substance found in foods and made by the body that is widely used as a supplement and food emulsifier. Evidence supporting most of its health claims is limited, t...

Read the full Lecithin monograph → Herb & supplement monograph

Coenzyme Q10

Interacts with 198 drugs

CoQ10 is a vitamin-like substance your body makes naturally that helps cells produce energy and acts as an antioxidant. It is generally well tolerated and is most studied for heart condition...

Read the full Coenzyme Q10 monograph →
Sources

Sources & How We Checked

Chewable CoQ10 200 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 113 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 E 64 references
  1. Kim JM, White RH. Effect of vitamin E on the anticoagulant response to warfarin. Am J Cardiol 1996;77:545-6. PubMed
  2. Corrigan JJ Jr. The effect of vitamin E on warfarin-induced vitamin K deficiency. Ann N Y Acad Sci 1982;393:361-8. PubMed
  3. Corrigan JJ Jr. Coagulation problems relating to vitamin E. Am J Pediatr Hematol Oncol 1979;1:169-73.
  4. Corrigan JJ Jr, Marcus FI. Coagulopathy associated with vitamin E ingestion. JAMA 1974;230:1300-1. DOI
  5. Labriola D, Livingston R. Possible interactions between dietary antioxidants and chemotherapy. Oncology 1999;13:1003-8.
  6. Chang T, Benet LZ, Hebert MF. The effect of water-soluble vitamin E on cyclosporine pharmacokinetics in healthy volunteers. Clin Pharmacol Ther 1996;59:297-303. PubMed
  7. Pan SH, Lopez RR Jr, Sher LS, et al. Enhanced oral cyclosporine absorption with water-soluble vitamin E early after liver transplantation. Pharmacother 1996;16:59-65. DOI
  8. Anon. Dietary supplementation with n-3 polyunsaturated fatty acids and vitamin E after myocardial infarction: results of the GISSI-Prevenzione trial. Gruppo Italiano per lo Studio della Soprawivenza nell'Infarto miocardico. Lancet 1999;354:447-55. DOI
  9. Chappell LC, Seed PT, Briley AL, et al. Effect of antioxidants on the occurrence of pre-eclampsia in women at increased risk: a randomised trial. Lancet 1999;354:810-6. DOI
  10. Yusuf S, Dagenais G, Pogue J, et al. Vitamin E supplementation and cardiovascular events in high-risk patients. The heart outcomes prevention evaluation study investigators. N Engl J Med 2000;342:154-60. PubMed
  11. Stephens NG, Parsons A, Schofield PM, et al. Randomised controlled trial of vitamin E in patients with coronary disease: Cambridge Heart Antioxidant Study. Lancet 1996;347:781-6.
  12. The Alpha-Tocopherol, Beta Carotene Cancer Prevention Study Group. The effect of vitamin E and beta carotene on the incidence of lung cancer and other cancers in male smokers. N Engl J Med 1994;330:1029-35. PubMed
  13. Takahashi O. Haemorrhagic toxicity of a large dose of alpha-, beta-, gamma- and delta-tocopherols, ubiquinone, beta-carotene, retinol acetate and L-ascorbic acid in the rat. Food Chem Toxicol 1995;33:121-8.
  14. Briggs GB, Freeman RK, Yaffe SJ. Drugs in Pregnancy and Lactation. 5th ed. Philadelphia, PA: Lippincott Williams & Wilkins; 1998.
  15. Sano M, Ernesto C, Thomas RG, et al. A controlled trial of selegiline, alpha-tocopherol, or both as treatment for Alzheimer's disease. The Alzheimer's Disease Cooperative Study. N Engl J Med 1997;336:1216-22. PubMed
  16. Liede KE, Haukka JK, Saxen LM, Heinonen OP. Increased tendency towards gingival bleeding caused by joint effect of alpha-tocopherol supplementation and acetylsalicylic acid. Ann Med 1998;30:542-6.
  17. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids. Washington, DC: National Academy Press, 2000. Available at: http://www.nap.edu/books/0309069351/html/.
  18. Brown BG, Zhao XQ, Chait A, et al. Simvastatin and niacin, antioxidant vitamins, or the combination for the prevention of coronary disease. N Engl J Med 2001;345:1583-93. DOI
  19. Liu M, Wallmon A, Olsson-Mortlock C, et al. Mixed tocopherols inhibit platelet aggregation in humans: potential mechanisms. Am J Clin Nutr 2003;77:700-6. PubMed
  20. Sokol RJ, Johnson KE, Karrer FM, et al. Improvement of cyclosporin absorption in children after liver transplantation by means of water-soluble vitamin E. Lancet 1991;338:212-4.. PubMed
  21. Stein JH, Carlsson CM, Papcke-Benson K, et al. The effects of lipid-lowering and antioxidant vitamin therapies on flow-mediated vasodilation of the brachial artery in older adults with hypercholesterolemia. J Am Coll Cardiol 2001;38:1806-13.. PubMed
  22. Carlsson CM, Papcke-Benson K, Carnes M, et al. Health-related quality of life and long-term therapy with pravastatin and tocopherol (vitamin E) in older adults. Drugs Aging 2002;19:793-805. . PubMed
  23. Cheung MC, Zhao XQ, Chait A, et al. Antioxidant supplements block the response of HDL to simvastatin-niacin therapy in patients with coronary artery disease and low HDL. Arterioscler Thromb Vasc Biol 2001;21:1320-6. PubMed
  24. Schrogie JJ. Coagulopathy and fat-soluble vitamins (letter). JAMA 1975;232:19. DOI
  25. Celestini A, Pulcinelli FM, Pignatelli P, et al. Vitamin E potentiates the antiplatelet activity of aspirin in collagen-stimulated platelets. Haematologica 2002;87:420-6.
  26. Stampfer MJ, Jakubowski JA, Faigel D, et al. Vitamin E supplementation effect on human platelet function, arachidonic acid metabolism, and plasma prostacyclin levels. Am J Clin Nutr 1988;47:700-6. PubMed
  27. Jandak J, Steiner M, Richardson PD. Alpha-tocopherol, an effective inhibitor of platelet adhesion. Blood 1989;73:141-9. DOI
  28. Freedman JE, Farhat JH, Loscalzo J, Keaney JF. Alpha-tocopherol inhibits aggregation of human platelets by a protein kinase C-dependent mechanism. Circulation 1996;94:2434-40. PubMed
  29. Steiner M. Vitamin E, a modifier of platelet function: rationale and use in cardiovascular and cerebrovascular disease. Nutr Rev 1999;57:306-9. PubMed
  30. Brodkin RH, Bleiberg J. Sensitivity to topically applied vitamin E. Arch Dermatol 1965;92:76-7. DOI
  31. Booth SL, Golly I, Sacheck JM, et al. Effect of vitamin E supplementation on vitamin K status in adults with normal coagulation status. Am J Clin Nutr 2004;80:143-8. PubMed
  32. Miller ER 3rd, Pastor-Barriuso R, Dalal D, et al. Meta-analysis: High-dosage vitamin E supplementation may increase all-cause mortality. Ann Intern Med 2005;142:60520-53. PubMed
  33. Lonn E, Bosch J, Yusuf S, et al. HOPE and HOPE-TOO Trial Investigators. Effects of long-term vitamin E supplementation on cardiovascular events and cancer: a randomized controlled trial. JAMA 2005;293:1338-47. PubMed
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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.

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