CoQ10 Plus Selenium Yeast Ingredients & Drug Interactions
What is this page for?
First and foremost: checking CoQ10 Plus Selenium Yeast 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 Plus Selenium Yeast is a dietary supplement by Doctor's Best with 2 active ingredients. Its ingredients are commonly taken for heart health, statin-related muscle aches, migraine prevention.Based on those ingredients, 510 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Selenium, Coenzyme Q-10. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against CoQ10 Plus Selenium Yeast by Doctor's Best
Ask about any prescription or over-the-counter medication and we check it for interactions with CoQ10 Plus Selenium Yeast by Doctor's Best — 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 Plus Selenium Yeast by Doctor's Best
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 (also called CoQ10), which plays a role in cellular energy production, and selenium, a mineral that supports immune function and acts as an antioxidant. The capsule also includes inactive ingredients — rice powder, hypromellose, rice hull concentrate, and magnesium stearate — which are fillers and binding agents.
Does it work?
Moderate evidence
Coenzyme Q10 is likely effective for CoQ10 deficiency itself, and possibly effective for fibromyalgia, migraine headache, congestive heart failure, and diabetic nerve pain. Selenium is likely effective for selenium deficiency and possibly effective for Kashin-Beck disease, pre-eclampsia, and autoimmune thyroiditis, though it's rated possibly ineffective for high cholesterol (dyslipidemia).
The evidence for most of these uses is not definitive, so talk with your doctor about whether this product makes sense for your specific situation.
How safe is it?
Well-documented data
CoQ10 is generally well tolerated by most adults when used as directed. The most common side effects are gastrointestinal — a small number of users report appetite suppression, diarrhea, heartburn, nausea, or vomiting, usually at doses above 100 mg daily (splitting the dose can help).
Rarely, headache, dizziness, insomnia, skin itching, or allergic rash have been reported. Selenium is generally well tolerated when kept at or below 400 mcg daily, but excess selenium can be toxic.
Common side effects are stomach discomfort, headache, and rash. High doses can cause hair loss, skin problems, fatigue, nail changes, nausea, and weight loss.
There isn't enough data to know if CoQ10 is safe in pregnancy; avoid it unless your doctor advises otherwise. Selenium is rated possibly safe in pregnancy and possibly safe while breastfeeding, but selenium breastfeeding safety hasn't been well studied, so check with your doctor.
Meds to double-check
Moderate interaction found
Check your medications if you take warfarin or any blood thinner — both CoQ10 and selenium have Moderate interactions that may reduce effectiveness or increase bleeding risk. Also flag chemotherapy drugs (especially alkylating agents), blood pressure medications, immunosuppressants, barbiturates, contraceptive drugs, and niacin before starting this product.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
This product may be worth considering if you have a CoQ10 or selenium deficiency or are exploring options for conditions like migraine or heart failure — but it comes with several significant medication interactions, especially with blood thinners and chemotherapy. If you take warfarin, blood pressure drugs, blood thinners, chemotherapy, immunosuppressants, or barbiturates, check your medications with the tool on this page first.
Talk to your pharmacist before starting, especially if you're pregnant, breastfeeding, or taking any prescription drugs.
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 Jul 21, 2022.
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 Plus Selenium Yeast, straight from the product label.
| Brand | Doctor's Best |
|---|---|
| Barcode (UPC) | 753950005235 |
| Net contents | 45 Veggie Cap(s) |
| Market status | On market |
| Date entered into DSLD | Jul 21, 2022 |
| DSLD ID | 269732 |
| Product type | Other Combinations |
| Supplement form | Capsule |
| Dietary claims / uses | All Other, Structure/Function |
| Intended target group(s) | Vegan, Vegetarian, Adult (18 - 50 Years), Gluten 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 Plus Selenium Yeast by Doctor's Best, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Coenzyme Q-10 | 200 mg | -- |
| Selenium | 200 mcg | 364% |
Other ingredients: Rice powder, Hypromellose, Rice hull concentrate, Magnesium Stearate
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.
Formula
Doctor's Best CoQ10 Plus Selenium Yeast contains the same combination, CoQ10 (200mg) and Selenium (200mcg), as clinically tested with 443 participants in a double-blind placebo controlled Swedish study, KiSel-10. In the KiSel-10 study, participants who took this combination recorded healthier cardiovascular function and higher Health-Related Quality of Life (HRQoL) scores compared to the group who did not. Our CoQ10 is naturally fermented USP (United States Pharmacopeia) verified and is combined with high quality selenium yeast to create the same synergistic nutrient combination as the KiSel-10 study.
USP Verified, Naturally Fermented CoQ10
Formulation
CoQ10 Plus Selenium Yeast Helps support cardiovascular health Helps restore CoQ10 that may be depleted by aging and cholesterol lowering drugs (statins) Both are antioxidants that help provide support against free radicals
Scientifically-studied unique heart health combination
Non-GMO Gluten Free Soy Free
Vegan
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)
Science-Based Nutrition Doctor's Best
FDA Statement of Identity
Dietary Supplement
Suggested/Recommended/Usage/Directions
Suggested Adult Use: Take 1 capsule daily with food, or as recommended by a nutritionally informed physician.
Storage
Store in a cool dry place.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
CoQ10 Plus Selenium Yeast by Doctor's Best 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 Plus Selenium Yeast by Doctor's Best
These are the 2 active ingredients this product is made of. Select any to open its full monograph.
Serving size1 Veggie Capsule(s) Dosage formCapsule Servings per container45 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 Q-10
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 Q-10 monograph & interactionsSelenium
Interacts with321 drugs
Selenium is an essential trace mineral your body needs in small amounts for thyroid function, antioxidant defense, and immune health. Most people who...
Selenium monograph & interactionsOther (inactive) ingredients: Rice powder, Hypromellose, Rice hull concentrate, Magnesium Stearate. These complete the product’s ingredient list but are not active constituents.
CoQ10 Plus Selenium Yeast by Doctor's Best Drug Interactions
HelloPharmacist Interaction Report
CoQ10 Plus Selenium Yeast by Doctor's Best contains two active ingredients with documented interactions.
Coenzyme Q10 poses a Moderate interaction risk with chemotherapy drugs like cyclophosphamide — it has antioxidant effects that may theoretically reduce how these drugs work. CoQ10 also interacts Moderately with warfarin, a blood thinner, because it may have vitamin K-like effects that could decrease warfarin's ability to prevent clotting; a small number of cases of reduced warfarin effectiveness have been reported.
Read the full breakdown — every affected drug type, severity by severity
Selenium adds several more Moderate interactions. It may increase bleeding risk if you take anticoagulants or antiplatelet drugs (blood thinners or aspirin-type medications).
Selenium can theoretically reduce the effectiveness of immunosuppressant drugs, prolong the sedating effects of barbiturates, and interfere with warfarin activity. Warfarin appears in both ingredients' interaction lists, so this is a key concern if you take it.
Both also have Minor interactions with other drug types — CoQ10 with blood pressure medications and selenium with contraceptives and niacin.
Altogether, these interactions span 510 individual medications. Neither ingredient has a checked interaction profile with zero documented interactions, so there's no clean category to set aside here.
Before you start this product, run your exact medications through the checker below — especially if you take any blood thinners, chemotherapy, or drugs that lower blood pressure.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against CoQ10 Plus Selenium Yeast?
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 Plus Selenium Yeast interact with 510 drugs. Click any drug to see the details.
2 of the 2 ingredients in CoQ10 Plus Selenium Yeast interact with drugs. Each result below shows which ingredient is responsible. Selenium Coenzyme Q-10
6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + 6-mercaptopurine interactionAbciximabReoPro
How Abciximab interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Abciximab interactionAbrocitinibCibinqo
How Abrocitinib interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs, Immunosuppressants Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Abrocitinib interactionAcenocoumarolSintrom
How Acenocoumarol interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Acenocoumarol interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, ButalbitalAxocet, Bancap, Bucet, Butex Forte, Esgic CF, Orbivan CF +5 more
How Acetaminophen, Butalbital interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Acetaminophen, Butalbital interactionAcetaminophen, Butalbital, CaffeineEsgic, Esgic Plus, Fiogesic, Fioricet, Repan, Tecnal +1 more
How Acetaminophen, Butalbital, Caffeine interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Acetaminophen, Butalbital, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Acetaminophen, Ibuprofen interactionAcetylsalicylic AcidEntrophen
How Acetylsalicylic Acid interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Acetylsalicylic Acid interactionAdalimumabHumira
How Adalimumab interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Adalimumab interactionAdalimumab-adazHyrimoz
How Adalimumab-adaz interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Adalimumab-adaz interactionAdalimumab-adbmCyltezo
How Adalimumab-adbm interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Adalimumab-adbm interactionAdalimumab-afzbAbrilada
How Adalimumab-afzb interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Adalimumab-afzb interactionAdalimumab-attoAmjevita
How Adalimumab-atto interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Adalimumab-atto interactionAdalimumab-bwwdHadlima
How Adalimumab-bwwd interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Adalimumab-bwwd interactionAdalimumab-fkjpHulio
How Adalimumab-fkjp interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Adalimumab-fkjp interactionAlefaceptAmevive
How Alefacept interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Alefacept interactionAlemtuzumabCampath
How Alemtuzumab interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumImmunosuppressants Moderate
Interaction Summary
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
Read the full Selenium + Alemtuzumab interactionAlteplase, TpaActilyse, Activase
How Alteplase, Tpa interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Alteplase, Tpa interactionAltretamineHexalen
How Altretamine interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
Coenzyme Q-10Alkylating Agents Moderate
Interaction Summary
Coenzyme Q10 has antioxidant effects.
Read the full Coenzyme Q-10 + Altretamine interactionAluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
How Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interactionAluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin
How Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interactionAminophylline, Amobarbital, EphedrineAmesec
How Aminophylline, Amobarbital, Ephedrine interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Aminophylline, Amobarbital, Ephedrine interactionAmobarbitalAmytal
How Amobarbital interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Amobarbital interactionAmobarbital, Ephedrine SulfateEphedrine & Amytal
How Amobarbital, Ephedrine Sulfate interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Amobarbital, Ephedrine Sulfate interactionAmobarbital, SecobarbitalTuinal
How Amobarbital, Secobarbital interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumBarbiturates Moderate
Interaction Summary
Theoretically, selenium might prolong the sedating effects of barbiturates.
Read the full Selenium + Amobarbital, Secobarbital interactionAnacaulase-bcdbNexoBrid
How Anacaulase-bcdb interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Anacaulase-bcdb interactionAnagrelideAgrylin
How Anagrelide interacts with CoQ10 Plus Selenium Yeast — through 1 ingredient. Tap an ingredient for the detail:
SeleniumAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Selenium + Anagrelide interactionEach ingredient & the kinds of drugs it affects
For each ingredient in CoQ10 Plus Selenium Yeast 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.
Selenium
Anticoagulant/Antiplatelet Drugs
Selenium may have antiplatelet effects and may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Clinical research suggests that taking selenium 10 mcg/kg/day can increase bleeding times by increasing prostacyclin production, which inhibits platelet activity. Other clinical research suggests that taking selenium 75 mcg daily, in combination with ascorbic acid 600 mg, alpha-tocopherol 300 mg, and beta-carotene 27 mg, reduces platelet aggregation.
Barbiturates
Theoretically, selenium might prolong the sedating effects of barbiturates.
Laboratory research suggests that selenium can inhibit the hepatic metabolism of barbiturates. Selenium seems to prolong the sedative effect of pentobarbital in animal models.
Immunosuppressants
Theoretically, selenium supplementation may reduce the effectiveness of immunosuppressant therapy.
In vitro research and preliminary clinical evidence suggests that selenium may stimulate the immune system.
Warfarin (Coumadin)
Theoretically, selenium might interfere with warfarin activity.
Animal research suggests that selenium can increase warfarin activity. Selenium might interact with warfarin by displacing it from albumin binding sites, reducing its metabolism in the liver, or by decreasing production of vitamin K-dependent clotting factors. Selenium can also prolong bleeding times in humans by increasing prostacyclin production, which inhibits platelet activity.
Contraceptive Drugs
Contraceptive drugs might increase levels of selenium, although the clinical significance of this effect is unclear.
Some research suggests that oral contraceptives increase serum selenium levels in women taking oral contraceptives; however, other research shows no change in selenium levels. It is suggested that an increase could be due to increased carrier proteins, indicating a redistribution of selenium rather than a change in total body selenium.
Niacin
Selenium might reduce the beneficial effects of niacin on high-density lipoprotein (HDL) levels.
A combination of niacin and simvastatin (Zocor) effectively raises HDL cholesterol levels in patients 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% in patients with coronary disease. It is not known whether this adverse effect is due to a single antioxidant such as selenium, or to the combination. It also is not known whether it will occur in other patient populations.
Coenzyme Q-10
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.
Brand information
Manufacturer and brand details for CoQ10 Plus Selenium Yeast, from the product label.
Doctor's Best
See all Doctor's Best products- Name
- Doctor's Best, Inc.
- State
- California
- ZipCode
- 92612
- Phone Number
- (800) 777-2474
- Web Address
- drbvitamins.com
CoQ10 Plus Selenium Yeast by Doctor's Best: Common Questions
Does CoQ10 Plus Selenium Yeast by Doctor's Best interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What's the difference between CoQ10 and selenium — why are they together in one product?
Can I take this if I'm on warfarin?
What are the most common side effects?
Is this safe to take while I'm breastfeeding?
Will this help my migraines or heart problems?
Can I take this with my blood pressure medication?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if CoQ10 Plus Selenium Yeast 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 CoQ10 Plus Selenium Yeast’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 monographSelenium
Interacts with 321 drugsSelenium is an essential trace mineral your body needs in small amounts for thyroid function, antioxidant defense, and immune health. Most people who eat a varied diet get enough, and supple...
Read the full Selenium monograph →Sources & How We Checked
CoQ10 Plus Selenium Yeast'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 76 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
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