CoQ10 100 mg Ingredients & Drug Interactions
by NOW
What is this page for?
First and foremost: checking CoQ10 100 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
CoQ10 100 mg is a dietary supplement by NOW with 2 active ingredients. Its ingredients are commonly taken for heart health, statin-related muscle aches, migraine prevention.Based on those ingredients, 332 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Coenzyme Q10, Hawthorn Berry. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against CoQ10 100 mg by NOW
Ask about any prescription or over-the-counter medication and we check it for interactions with CoQ10 100 mg 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 CoQ10 100 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.
What’s inside
Full disclosure
This product contains 2 active ingredients: Coenzyme Q10 and Hawthorn Berry extract. Coenzyme Q10 is a compound your cells make naturally to produce energy and protect against oxidative damage.
Hawthorn Berry is a plant extract traditionally used to support heart and circulatory function. The capsule also contains hypromellose, an inactive binder.
Does it work?
Strong evidence
Coenzyme Q10 is rated Likely Effective for treating CoQ10 deficiency and Possibly Effective for fibromyalgia, migraine headache, congestive heart failure, and diabetic neuropathy. Hawthorn, however, has insufficient reliable evidence to rate its effectiveness for the conditions it's studied in—including angina, anxiety, arrhythmia, atherosclerosis, cardiovascular disease, and cognitive function.
The evidence we hold doesn't establish how well it works for these uses.
How safe is it?
Well-documented data
Coenzyme Q10 is generally well tolerated by most adults. The most common side effects are gastrointestinal—appetite suppression, diarrhea, heartburn, nausea, and vomiting—occurring in less than 1% of people.
Headache, dizziness, and insomnia have been reported rarely. There isn't enough safety data during pregnancy to know either way; talk with your doctor or pharmacist for personalized advice.
Safety while breastfeeding hasn't been well studied; use caution and check with your doctor. Hawthorn is generally well tolerated in studies but carries a caution: serious cardiac conditions need medical supervision.
The safety data advises against hawthorn during pregnancy and while breastfeeding. Serious side effects are rare but include multiorgan allergic reactions with kidney failure, respiratory issues, and heart rhythm problems like palpitations and circulation failure have been reported in patients with heart failure.
Meds to double-check
Major interaction found
Before taking this product, check with your pharmacist or use the interaction tool if you take nitrates, phosphodiesterase-5 inhibitors like sildenafil, warfarin or other blood thinners, chemotherapy drugs, beta-blockers, calcium channel blockers, antiplatelet drugs like aspirin, or digoxin. These are the main medication types with documented interactions in CoQ10 and Hawthorn.
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 pairs CoQ10—which has solid evidence for deficiency and some support in heart and migraine conditions—with Hawthorn, an herb with unproven effectiveness for its intended uses. The real concern is Hawthorn's major interactions with blood pressure medications and heart drugs.
If you take any heart medication, blood thinner, blood pressure pill, or anything for erectile dysfunction, check with your pharmacist first.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Apr 22, 2021.
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 CoQ10 100 mg, straight from the product label.
| Brand | NOW |
|---|---|
| Barcode (UPC) | 733739032102 |
| Net contents | 30 Veg Capsule(s) |
| Market status | On market |
| Date entered into DSLD | Apr 22, 2021 |
| DSLD ID | 245785 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, 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 CoQ10 100 mg by NOW, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Coenzyme Q10 | 100 mg | -- |
| Hawthorn Berry | 400 mg | -- |
Other ingredients: Hypromellose
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 fat-containing meal.
Formulation
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 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.
Natural color variation may occur in this product.
Non GMO Project Verified nongmoproject.org
Cardiovascular health Cellular energy production
Vegetarian/vegan
Not manufactured with wheat, gluten, soy, corn, milk, egg, fish, shellfish or tree nut ingredients.
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.
Consult a physician if pregnant/nursing, taking medication, or have a medical condition.
Keep out of reach of children.
Not manufactured with wheat, gluten, soy, corn, 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.
Seals/Symbols
GMP Quality Assured
Non GMO Project Verified nongmoproject.org
Triangle K (Kosher)
Formula
CoQ10 100 mg With Hawthorn Berry
Triangle K (Kosher)
NOW CoQ10 is pharmaceutical grade. NOW CoQ10 products contain only the all-trans form of CoQ10 produced by fermentation.
FDA Statement of Identity
A Dietary Supplement
General Statements
General health Family owned since 1968.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
CoQ10 100 mg 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 CoQ10 100 mg by NOW
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Veg Capsule(s) Dosage formCapsule Servings per container30 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.
Coenzyme Q10
Interacts with198 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...
Coenzyme Q10 monograph & interactionsHawthorn Berry
Interacts with191 drugs
Hawthorn is a plant traditionally used for heart-related complaints, and some studies suggest it may modestly help symptoms of mild heart failure when...
Hawthorn Berry monograph & interactionsOther (inactive) ingredients: Hypromellose. These complete the product’s ingredient list but are not active constituents.
CoQ10 100 mg by NOW Drug Interactions
HelloPharmacist Interaction Report
NOW CoQ10 100 mg pairs Coenzyme Q10 with Hawthorn Berry, and Hawthorn is the ingredient driving the most serious interactions here.
It carries Major-severity concerns with nitrates (used for chest pain) and phosphodiesterase-5 inhibitors like sildenafil (Viagra), both of which can dangerously lower your blood pressure when combined with hawthorn's vasodilatory effects.
Read the full breakdown — every affected drug type, severity by severity
Coenzyme Q10 itself has Moderate interactions with blood thinners like warfarin—it may reduce their effectiveness—and with chemotherapy drugs like cyclophosphamide, where its antioxidant effects might interfere with how the drugs work. CoQ10 can also theoretically add to the blood-pressure-lowering effect of antihypertensive medications (Minor severity).
Hawthorn carries additional Moderate concerns with beta-blockers, calcium channel blockers, blood thinners and antiplatelet drugs (like aspirin), and digoxin—a heart medication where hawthorn might amplify both its benefits and its side effects. Altogether, these interactions span 332 individual medications.
Run your exact prescriptions through the checker on this page before you start.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against CoQ10 100 mg?
Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.
Go to the checkerIngredients driving the most interactions
Individual Drug Interactions
The ingredients in CoQ10 100 mg interact with 332 drugs. Click any drug to see the details.
2 of the 2 ingredients in CoQ10 100 mg interact with drugs. Each result below shows which ingredient is responsible. Coenzyme Q10 Hawthorn Berry
AvanafilStendra
How Avanafil interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryPhosphodiesterase-5 Inhibitors Major
Interaction Summary
Theoretically, concomitant use might result in additive vasodilation and hypotension.
Read the full Hawthorn Berry + Avanafil interactionFinasteride, TadalafilEntadfi
How Finasteride, Tadalafil interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryPhosphodiesterase-5 Inhibitors Major
Interaction Summary
Theoretically, concomitant use might result in additive vasodilation and hypotension.
Read the full Hawthorn Berry + Finasteride, Tadalafil interactionGlyceryl TrinitrateNitronal
How Glyceryl Trinitrate interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryNitrates Major
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Read the full Hawthorn Berry + Glyceryl Trinitrate interactionIsosorbide DinitrateAngitak, Cedocard Retard, Isoket, Isoket Retard, Isordil
How Isosorbide Dinitrate interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryNitrates Major
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Read the full Hawthorn Berry + Isosorbide Dinitrate interactionIsosorbide Dinitrate, HydralazineBiDil
How Isosorbide Dinitrate, Hydralazine interacts with CoQ10 100 mg — through 2 ingredients. Tap an ingredient for the detail:
Hawthorn BerryNitrates Major
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Read the full Hawthorn Berry + Isosorbide Dinitrate, Hydralazine interactionCoenzyme Q10Antihypertensive Drugs Minor
Interaction Summary
Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Read the full Coenzyme Q10 + Isosorbide Dinitrate, Hydralazine interactionIsosorbide MononitrateAngeze, Angeze SR, Chemydur 60XL, Dynamin, Elantan, Elantan LA +13 more
How Isosorbide Mononitrate interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryNitrates Major
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Read the full Hawthorn Berry + Isosorbide Mononitrate interactionMacitentan, TadalafilOpsynvi
How Macitentan, Tadalafil interacts with CoQ10 100 mg — through 2 ingredients. Tap an ingredient for the detail:
Hawthorn BerryPhosphodiesterase-5 Inhibitors Major
Interaction Summary
Theoretically, concomitant use might result in additive vasodilation and hypotension.
Read the full Hawthorn Berry + Macitentan, Tadalafil interactionCoenzyme Q10Antihypertensive Drugs Minor
Interaction Summary
Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Read the full Coenzyme Q10 + Macitentan, Tadalafil interactionNicorandilAprior, Dancor, Ikorel, Sigmart, Zynicor
How Nicorandil interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryNitrates Major
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Read the full Hawthorn Berry + Nicorandil interactionNitroglycerinGonitro, Nitro Time, Nitro-Bid, Nitrocine Timecaps, Nitrogard, Nitrogard SR +7 more
How Nitroglycerin interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryNitrates Major
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Read the full Hawthorn Berry + Nitroglycerin interactionPentaerythritol TetranitratePeritrate, Peritrate SA
How Pentaerythritol Tetranitrate interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryNitrates Major
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Read the full Hawthorn Berry + Pentaerythritol Tetranitrate interactionSildenafilRevatio
How Sildenafil interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryPhosphodiesterase-5 Inhibitors Major
Interaction Summary
Theoretically, concomitant use might result in additive vasodilation and hypotension.
Read the full Hawthorn Berry + Sildenafil interactionSildenafil CitrateViagra
How Sildenafil Citrate interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryPhosphodiesterase-5 Inhibitors Major
Interaction Summary
Theoretically, concomitant use might result in additive vasodilation and hypotension.
Read the full Hawthorn Berry + Sildenafil Citrate interactionTadalafilCialis, Tadliq
How Tadalafil interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryPhosphodiesterase-5 Inhibitors Major
Interaction Summary
Theoretically, concomitant use might result in additive vasodilation and hypotension.
Read the full Hawthorn Berry + Tadalafil interactionVardenafilLevitra, Staxyn
How Vardenafil interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryPhosphodiesterase-5 Inhibitors Major
Interaction Summary
Theoretically, concomitant use might result in additive vasodilation and hypotension.
Read the full Hawthorn Berry + Vardenafil interactionAbciximabReoPro
How Abciximab interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Abciximab interactionAbrocitinibCibinqo
How Abrocitinib interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Abrocitinib interactionAcebutololRhotral, Sectral
How Acebutolol interacts with CoQ10 100 mg — through 2 ingredients. Tap an ingredient for the detail:
Hawthorn BerryBeta-blockers Moderate
Interaction Summary
Theoretically, concomitant use might cause additive effects on blood pressure and heart rate.
Read the full Hawthorn Berry + Acebutolol interactionCoenzyme Q10Antihypertensive Drugs Minor
Interaction Summary
Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Read the full Coenzyme Q10 + Acebutolol interactionAcenocoumarolSintrom
How Acenocoumarol interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Acenocoumarol interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Acetaminophen, Ibuprofen interactionAcetylsalicylic AcidEntrophen
How Acetylsalicylic Acid interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Acetylsalicylic Acid interactionAlteplase, TpaActilyse, Activase
How Alteplase, Tpa interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Alteplase, Tpa interactionAltretamineHexalen
How Altretamine interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q10 + Altretamine interactionAluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
How Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interactionAluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin
How Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interacts with CoQ10 100 mg — through 1 ingredient. Tap an ingredient for the detail:
Hawthorn BerryAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Hawthorn Berry + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interactionAmlodipineNorliqva
How Amlodipine interacts with CoQ10 100 mg — through 2 ingredients. Tap an ingredient for the detail:
Hawthorn BerryCalcium Channel Blockers Moderate
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilation and hypotensive effects.
Read the full Hawthorn Berry + Amlodipine interactionCoenzyme Q10Antihypertensive Drugs Minor
Interaction Summary
Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Read the full Coenzyme Q10 + Amlodipine interactionAmlodipine BenzoateKaterzia
How Amlodipine Benzoate interacts with CoQ10 100 mg — through 2 ingredients. Tap an ingredient for the detail:
Hawthorn BerryCalcium Channel Blockers Moderate
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilation and hypotensive effects.
Read the full Hawthorn Berry + Amlodipine Benzoate interactionCoenzyme Q10Antihypertensive Drugs Minor
Interaction Summary
Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Read the full Coenzyme Q10 + Amlodipine Benzoate interactionAmlodipine BesilateIstin
How Amlodipine Besilate interacts with CoQ10 100 mg — through 2 ingredients. Tap an ingredient for the detail:
Hawthorn BerryCalcium Channel Blockers Moderate
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilation and hypotensive effects.
Read the full Hawthorn Berry + Amlodipine Besilate interactionCoenzyme Q10Antihypertensive Drugs Minor
Interaction Summary
Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Read the full Coenzyme Q10 + Amlodipine Besilate interactionAmlodipine BesylateNorvasc
How Amlodipine Besylate interacts with CoQ10 100 mg — through 2 ingredients. Tap an ingredient for the detail:
Hawthorn BerryCalcium Channel Blockers Moderate
Interaction Summary
Theoretically, concomitant use might cause additive coronary vasodilation and hypotensive effects.
Read the full Hawthorn Berry + Amlodipine Besylate interactionCoenzyme Q10Antihypertensive Drugs Minor
Interaction Summary
Theoretically, coenzyme Q10 might have additive effects with antihypertensive drugs.
Read the full Coenzyme Q10 + Amlodipine Besylate interactionEach ingredient & the kinds of drugs it affects
For each ingredient in CoQ10 100 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.
Coenzyme Q10
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.
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.
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.
Hawthorn Berry
Nitrates
Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Some evidence shows that hawthorn might lower blood pressure due to vasodilatory effects.
Phosphodiesterase-5 Inhibitors
Theoretically, concomitant use might result in additive vasodilation and hypotension.
Hawthorn might inhibit PDE-5 and cause vasodilation.
Anticoagulant/Antiplatelet Drugs
Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
In vitro and animal research shows that hawthorn can inhibit platelet aggregation. However, its effect in humans is unclear. One observational study shows that patients taking hawthorn shortly before undergoing coronary artery bypass graft (CABG) surgery or valve replacement surgery have a 10% incidence of postoperative bleeding, compared with 1% in those who never consumed hawthorn extract. However, clinical research shows that taking a specific preparation of dried hawthorn leaves and flowers (Crataesor, Soria Natural Lab) 800 mg three times daily for 15 days does not affect platelet aggregation or levels of thromboxane B2, the metabolite of thromboxane A2, in healthy humans.
Beta-Blockers
Theoretically, concomitant use might cause additive effects on blood pressure and heart rate.
Some evidence shows that hawthorn might lower blood pressure and heart rate.
Calcium Channel Blockers
Theoretically, concomitant use might cause additive coronary vasodilation and hypotensive effects.
Some evidence shows that hawthorn might lower blood pressure due to vasodilatory effects.
Digoxin (Lanoxin)
Theoretically, hawthorn might potentiate the effects and adverse effects of digoxin.
Hawthorn appears to improve cardiac output; however, hawthorn does not appear to affect digoxin pharmacokinetics. Case reports suggest that at least one species of hawthorn root extract (Crataegus mexicana) may produce adverse effects similar to digoxin and can cross-react with digoxin assays, leading to falsely elevated plasma digoxin levels.
Brand information
Manufacturer and brand details for CoQ10 100 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
CoQ10 100 mg by NOW: Common Questions
Does CoQ10 100 mg by NOW interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Does CoQ10 actually work?
What about the Hawthorn in here—does it help my heart?
Can I take this while pregnant?
What side effects should I watch for?
I'm on warfarin. Is this safe?
Does this product have any fillers?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if CoQ10 100 mg is safe with your meds?
Our pharmacists answer your medication & supplement questions — free.
Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.
The Full Monographs Behind CoQ10 100 mg’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Coenzyme Q10
Interacts with 198 drugsCoQ10 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 → Herb & supplement monographHawthorn
Interacts with 191 drugsHawthorn is a plant traditionally used for heart-related complaints, and some studies suggest it may modestly help symptoms of mild heart failure when added to standard care. However, the ev...
Read the full Hawthorn monograph →Sources & How We Checked
CoQ10 100 mg's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.
- 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 65 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.
Coenzyme Q10 40 references
- Kamikawa T, Kobayashi A, Yamashita T, et al. Effects of coenzyme Q10 on exercise tolerance in chronic stable angina pectoris. Am J Cardiol 1985;56:247-51. PubMed
- Langsjoen P, Willis R, Folkers K. Treatment of essential hypertension with coenzyme Q10. Mol Aspects Med 1994;S265-72. PubMed
- Spigset O. Reduced effect of warfarin caused by ubidecarenone. Lancet 1994;334:1372-3. PubMed
- Singh RB, Niaz MA, Rastogi SS, et al. Effect of hydrosoluble coenzyme Q10 on blood pressures and insulin resistance in hypertensive patients with coronary artery disease. J Hum Hypertens 1999;13:203-8. PubMed
- Portakal O, Ozkaya O, Erden Inal M, et al. Coenzyme Q10 concentrations and antioxidant status in tissues of breast cancer patients. Clin Biochem 2000;33:279-84. PubMed
- Lund EL, Quistorff B, Spang-Thomsen M, Kristjansen PE. Effect of radiation therapy on small-cell lung cancer is reduced by ubiquinone intake. Folia Microbiol (Praha) 1998;43:505-6. PubMed
- Langsjoen PH, Langsjoen PH, Folkers K. Long-term efficacy and safety of coenzyme Q10 therapy for idiopathic dilated cardiomyopathy. Am J Cardiol 1990;65:521-3. PubMed
- Heck AM, DeWitt BA, Lukes AL. Potential interactions between alternative therapies and warfarin. Am J Health Syst Pharm 2000;57:1221-7. DOI
- Landbo C, Almdal TP. [Interaction between warfarin and coenzyme Q10]. Ugeskr Laeger 1998;160:3226-7.
- Baggio E, Gandini R, Plauncher AC, et al. Italian multicenter study on the safety and efficacy of coenzyme Q10 as adjunctive therapy in heart failure. CoQ10 Drug Surveillance Investigators. Mol Aspects Med 1994;15 Suppl:S287-94. PubMed
- Burke BE, Neuenschwander R, Olson RD. Randomized, double-blind, placebo-controlled trial of coenzyme Q10 in isolated systolic hypertension. South Med J 2001;94:1112-7. PubMed
- The Huntington Study Group. A randomized, placebo-controlled trial of coenzyme Q10 and remacemide in Huntington's disease. Neurology 2001;57:397-404.
- Hodgson JM, Watts GF, Playford DA, et al. Coenzyme Q10 improves blood pressure and glycaemic control: a controlled trial in subjects with type 2 diabetes. Eur J Clin Nutr 2002;56:1137-42. PubMed
- Singh RB, Neki NS, Kartikey K, et al. Effect of coenzyme Q10 on risk of atherosclerosis in patients with recent myocardial infarction. Mol Cell Biochem 2003;246:75-82. DOI
- Porterfield LM. Why did the response to warfarin change? RN 2000;63:107.
- Sandor PS, Di Clemente L, Coppola G, et al. Efficacy of coenzyme Q10 in migraine prophylaxis: A randomized controlled trial. Neurology 2005;64:713-5. PubMed
- Engelsen J, Nielsen JD, Winther K. Effect of coenzyme Q10 and Ginkgo biloba on warfarin dosage in stable, long-term warfarin treated outpatients. A randomised, double blind, placebo-crossover trial. Thromb Haemost 2002;87:1075-6. DOI
- Berman M, Erman A, Ben-Gal T, et al. Coenzyme Q10 in patients with end-stage heart failure awaiting cardiac transplantation: a randomized, placebo-controlled study. Clin Cardiol 2004;27:295–9. PubMed
- Storch A, Jost WH, Vieregge P, et al. Randomized, double-blind, placebo-controlled trial on symptomatic effects of coenzyme Q10 in Parkinson disease. Arch Neurol 2007;64:938-44. DOI
- Digiesi V, Cantini F, Oradei A, et al. Coenzyme Q10 in essential hypertension. Mol Aspects Med 1994;15 Suppl:s257-63. PubMed
- Yamagami T, Takagi M, Akagami H, et al. Effect of coenzyme Q10 on essential hypertension, a double blind controlled study. In: Folkers KA, Yamamura Y, eds. Biomedical and Clinical Aspects of Coenzyme Q, Vol. 5. Amsterdam: Elsevier Science Publications, 19
- Ho MJ, Bellusci A, Wright JM. Blood pressure lowering efficacy of coenzyme Q10 for primary hypertension (review). Cochrane Database Syst Rev 2009;(4):CD007435. PubMed
- Rosenfeldt, F. L., Haas, S. J., Krum, H., Hadj, A., Ng, K., Leong, J. Y., and Watts, G. F. Coenzyme Q10 in the treatment of hypertension: a meta-analysis of the clinical trials. J Hum.Hypertens. 2007;21(4):297-306. PubMed
- Stamelou, M., Reuss, A., Pilatus, U., Magerkurth, J., Niklowitz, P., Eggert, K. M., Krisp, A., Menke, T., Schade-Brittinger, C., Oertel, W. H., and Hoglinger, G. U. Short-term effects of coenzyme Q10 in progressive supranuclear palsy: a randomized, place DOI
- Keogh A, Fenton S, Leslie C, et al. Randomised double-blind, placebo-controlled trial of coenzyme Q, therapy in class II and III systolic heart failure. Heart Lung Circ. 2003;12:135-41.
- Gane, E. J., Weilert, F., Orr, D. W., Keogh, G. F., Gibson, M., Lockhart, M. M., Frampton, C. M., Taylor, K. M., Smith, R. A., and Murphy, M. P. The mitochondria-targeted anti-oxidant mitoquinone decreases liver damage in a phase II study of hepatitis C
- Lynch, D. R., Perlman, S. L., and Meier, T. A phase 3, double-blind, placebo-controlled trial of idebenone in friedreich ataxia. Arch Neurol. 2010;67(8):941-947. PubMed
- Young, J. M., Florkowski, C. M., Molyneux, S. L., McEwan, R. G., Frampton, C. M., Nicholls, M. G., Scott, R. S., and George, P. M. A randomized, double-blind, placebo-controlled crossover study of coenzyme Q10 therapy in hypertensive patients with the me
- Ishiyama, T., Morita, Y., Toyama, S., Yamagami, T., and Tsukamoto, N. A clinical study of the effect of coenzyme Q on congestive heart failure. Jpn.Heart J 1976;17(1):32-42. PubMed
- Matthews, P. M., Ford, B., Dandurand, R. J., Eidelman, D. H., O'Connor, D., Sherwin, A., Karpati, G., Andermann, F., and Arnold, D. L. Coenzyme Q10 with multiple vitamins is generally ineffective in treatment of mitochondrial disease. Neurology 1993;43(5
- Malm, C., Svensson, M., Sjoberg, B., Ekblom, B., and Sjodin, B. Supplementation with ubiquinone-10 causes cellular damage during intense exercise. Acta Physiol Scand. 1996;157(4):511-512. PubMed
- Singh, R. B., Wander, G. S., Rastogi, A., Shukla, P. K., Mittal, A., Sharma, J. P., Mehrotra, S. K., Kapoor, R., and Chopra, R. K. Randomized, double-blind placebo-controlled trial of coenzyme Q10 in patients with acute myocardial infarction. Cardiovasc. PubMed
- Digiesi V, Cantini F, and Brodbeck B. Effect of coenzyme Q10 on essential arterial hypertension. Current Therapeutic Research 1990;47(5):841-845.
- Parkinson Study Group QE3 Investigators, Beal MF, Oakes D, et al. A randomized clinical trial of high-dosage coenzyme Q10 in early Parkinson disease: no evidence of benefit. JAMA Neurol. 2014;71(5):543-52.
- Alehagen U, Johansson P, Bjornstedt M, et al. Cardiovascular mortality and N-terminal-proBNP reduced after combined selenium and coenzyme Q10 supplementation: A 5-year prospective randomized double-blind placebo-controlled trial among elderly Swedish citi
- Ho MJ, Li EC, Wright JM. Blood pressure lowering efficacy of coenzyme Q10 for primary hypertension. Cochrane Database Syst Rev. 2016 Mar 3;3:CD007435. doi: 10.1002/14651858.CD007435.pub3. PubMed
- Tabrizi R, Akbari M, Sharifi N, Lankarani KB, Moosazadeh M, Kolahdooz F, et al. The effects of coenzyme Q10 supplementation on blood pressures among patients with metabolic diseases: a systematic review and meta-analysis of randomized controlled trials. PubMed
- Tsai IC, Hsu CW, Chang CH, Tseng PT, Chang KV. Effectiveness of coenzyme Q10 supplementation for reducing fatigue: A systematic review and meta-analysis of randomized controlled trials. Front Pharmacol 2022;13:883251. PubMed
- Yaghini O, Hoseini N, Ghazavi MR, et al. A comparative study on the efficacy of coenzyme Q10 and amitriptyline in the prophylactic treatment of migraine headaches in children: A randomized controlled trial. Adv Biomed Res 2022;11:43. PubMed
- Hansen KS, Mogensen TH, Agergaard J, et al. High-dose coenzyme Q10 therapy versus placebo in patients with post COVID-19 condition: A randomized, phase 2, crossover trial. Lancet Reg Health Eur 2022. PubMed
Hawthorn 25 references
- Tauchert M. Efficacy and safety of crataegus extract WS 1442 in comparison with placebo in patients with chronic stable New York Heart Association class-III heart failure. Am Heart J 2002;143:910-5. PubMed
- Pittler MH, Schmidt K, Ernst E. Hawthorn extract for treating chronic heart failure: meta-analysis of randomized trials. Am J Med 2003;114:665-74.. PubMed
- Chang Q, Zuo Z, Harrison F, Chow MS. Hawthorn. J Clin Pharmacol 2002;42:605-12.
- Holubarsch CJ, Colucci WS, Meinertz T, et al. The efficacy and safety of Crataegus extract WS 1442 in patients with heart failure: the SPICE trial. Eur J Heart Fail 2008;10:1255-63. PubMed
- Pittler MH, Guo R, and Ernst E. Hawthorn extract for treating chronic heart failure. Cochrane.Database.Syst Rev 2008:CD005312. PubMed
- Zick SM, Vautaw BM, Gillespie B, Aaronson KD. Hawthorn Extract Randomized Blinded Chronic Heart Failure (HERB CHF) trial. Eur J Heart Fail. 2009;11:990-99. PubMed
- Werner NS, Duschek S, and Schandry R. D-camphor-crataegus berry extract combination increases blood pressure and cognitive functioning in the elderly - a randomized, placebo controlled double blind study. Phytomedicine. 2009;16:1077-82. PubMed
- Dalli E, Colomer E, Tormos MC, et al. Crataegus laevigata decreases neutrophil elastase and has hypolipidemic effect: a randomized, double-blind, placebo-controlled trial. Phytomedicine. 6-15-2011;18:769-75. PubMed
- Maek-a-nantawat W, Phonrat B, Dhitavat J, et al. Safety and efficacy of CKBM-A01, a Chinese herbal medicine, among asymptomatic HIV patients. Southeast Asian J Trop.Med Public Health 2009;40:494-501.
- Asher GN, Viera AJ, Weaver MA, et al. Effect of hawthorn standardized extract on flow mediated dilation in prehypertensive and mildly hypertensive adults: a randomized, controlled cross-over trial. BMC.Complement Altern.Med 2012;12:26. PubMed
- Walker AF, Marakis G, Simpson E, et al. Hypotensive effects of hawthorn for patients with diabetes taking prescription drugs: a randomised controlled trial. Br J Gen.Pract 2006;56:437-43.
- Daniele C, Mazzanti G, Pittler MH, et al. Adverse-event profile of Crataegus spp.: a systematic review. Drug Saf 2006;29:523-35. PubMed
- Tankanow R, Tamer HR, Streetman DS, et al. Interaction study between digoxin and a preparation of hawthorn (Crataegus oxyacantha). J.Clin.Pharmacol. 2003;43:637-42. DOI
- Tauchert, M., Gildor, A., and Lipinski, J. [High-dose Crataegus extract WS 1442 in the treatment of NYHA stage II heart failure]. Herz 1999;24(6):465-474.
- Horoz, M., Gok, E., Genctoy, G., Ozcan, T., Olmaz, R., Akca, M., Kiykim, A., and Gurses, I. Crataegus orientalis associated multiorgan hypersensitivity reaction and acute renal failure. Intern.Med 2008;47(23):2039-2042. PubMed
- Dalli, E., Valles, J., Cosin-Sales, J., Santos, M. T., Moscardo, A., Milara, J., and Sotillo, J. F. Effects of hawthorn (Crataegus laevigata) on platelet aggregation in healthy volunteers. Thromb.Res 2011;128(4):398-400. PubMed
- Rogov VD. [Toxiderma due to the fruits of the hawthorn]. Vestn Dermatol Venerol 1984;7(7):46-47.
- Loew D, Albrecht M, and Podzuweit H. Efficacy and tolerability of a Hawthorn preparation in patients with heart failure Stage I and II according to NYHA - a surveillance study. Phytomedicine 1996;3(Suppl 1):92.
- Rababa'h AM, Altarabsheh SE, Haddad O, Deo SV, Obeidat Y, Al-Azzam S. Hawthorn Herb Increases the Risk of Bleeding after Cardiac Surgery: An Evidence-Based Approach. Heart Surg Forum 2016;19(4):E175-9. PubMed
- Shatoor AS, Soliman H, Al-Hashem F, Gamal BE, Othman A, El-Menshaw N. Effect of hawthorn (Crataegus aronia syn. Azarolus (L)) on platelet function in albino wistar rats. Thromb Res 2012;130(1):75-80. PubMed
- Vibes J, Lasserre B, Gleye J, Declume C. Inhibition of thromboxane A2 biosynthesis in vitro by the main components of Crataegus oxyacantha (hawthorn) flower heads. Prostaglandins Leukot Essent Fatty Acids 1994;50(4):173-5. PubMed
- Rogers KL, Grice ID, Griffiths LR. Inhibition of platelet aggregation and 5-HT release by extracts of Australian plants used traditionally as headache treatments. Eur J Pharm Sci 2000;9(4):355-63. PubMed
- Zhou CC, Huang XX, Gao PY, et al. Two new compounds from Crataegus pinnatifida and their antithrombotic activities. J Asian Nat Prod Res 2014;16(2):169-74.
- Palmer KG, Lebin JA, Cronin MT, Mazor SS, Burns RA. Crataegus mexicana (Tejocote) Exposure Associated with Cardiotoxicity and a Falsely Elevated Digoxin Level. J Med Toxicol. 2019;15(4):295-298. PubMed
- Espinosa J, Bassett R, Lucerna A, Finn D. Hawthorne root (Crataegus mexicana) toxicity. Am J Emerg Med. 2024;78:242.e5-242.e6. PubMed
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