Black Seed Ingredients & Drug Interactions
What is this page for?
First and foremost: checking Black Seed 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
Black Seed is a dietary supplement by Best Naturals with 4 active ingredients. Its ingredients are commonly taken for heart health, healthy cooking fat, skin moisturizing.Based on those ingredients, 912 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Black Cumin (seed) oil, Oleic Acid. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Black Seed by Best Naturals
Ask about any prescription or over-the-counter medication and we check it for interactions with Black Seed by Best Naturals — 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 Black Seed by Best Naturals
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
Low disclosure
Best Naturals Black Seed Liquid contains four ingredients. The active ones are gamma-linolenic acid, oleic acid, alpha-linolenic acid, and black cumin (seed) oil.
These are fatty acids and plant compounds traditionally used to support various aspects of health. The product also contains freshly cold-pressed and unrefined virgin black cumin seed oil as an inactive ingredient.
Does it work?
Moderate evidence
The evidence for black seed itself points to possible effectiveness for acne, allergic rhinitis (hay fever), asthma, Helicobacter pylori infection, and diabetes. Oleic acid — one of the fatty acids in this product — is possibly effective for high cholesterol and coronary heart disease.
However, the strength of evidence is modest: we don't have strong clinical proof that this liquid works for any of these conditions, only that preliminary research suggests it might help.
How safe is it?
Well-documented data
Black seed is generally well tolerated when taken orally, though some people report constipation, stomach burning, nausea, or vomiting. One clinical trial noted heavier menstrual bleeding, and in another study about one in five people experienced gastrointestinal complaints — one person was even hospitalized for severe nausea and vomiting thought to be related to black seed oil.
The safety data advises against taking this product during pregnancy; the data for breastfeeding is too limited to say either way, so talk with your pharmacist or doctor before using it if you're nursing.
Meds to double-check
Moderate interaction found
Before starting this product, double-check with your pharmacist if you take sedatives or sleep aids, antidepressants, blood pressure drugs, blood thinners, diabetes medications, diuretics, or immunosuppressants like cyclosporine. All of these have documented Moderate-severity interactions with black seed.
The bottom line
Scorecard at a glanceFormula with limited ingredient disclosure with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.
Black Seed Liquid might be worth considering if you're looking to support hay fever, asthma, or blood cholesterol — though the evidence is preliminary. If you take any medication for mood, sleep, blood pressure, blood clotting, blood sugar, or immune function, you'll want to check with your pharmacist first.
Avoid it if you're pregnant. Stomach upset is common, so take it with food if you try it.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 2 of 4 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Nov 21, 2020.
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 Black Seed, straight from the product label.
| Brand | Best Naturals |
|---|---|
| Barcode (UPC) | 817716011042 |
| Net contents | 8 fl. Oz.; 236 mL |
| Market status | On market |
| Date entered into DSLD | Nov 21, 2020 |
| DSLD ID | 239396 |
| Product type | Botanical With Nutrients |
| Supplement form | Liquid |
| Dietary claims / uses | Nutrient, All Other, Structure/Function |
| Intended target group(s) | Adult (18 - 50 Years), Gluten Free, Sugar 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 Black Seed by Best Naturals, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Calories | 45 Calorie(s) | -- |
| Calories from Fat | 45 Calorie(s) | -- |
| Total Fat | 5 Gram(s) | 7.5% |
| Gamma-Linolenic Acid | 0 NP | 59% |
| Oleic Acid | 0 NP | 23% |
| Saturated Fat | 1 Gram(s) | 5% |
| Alpha-Linolenic Acid | 0 NP | 0.5% |
| Black Cumin (seed) oil | 5 Gram(s) | -- |
Other ingredients: freshly cold-pressed & unrefined virgin Black Cumin seed oil
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
Best Naturals Black Seed Oil is derived from the seeds of the Nigella Sativa plant (also know as black cumin) which is carefully harvested and extracted with a cold-press method in order to ensure our oil is of the highest standards. Black Seed Oil is a rich source of essential fatty acids (EFAs) and has anti-oxidant and anti-inflammatory properties therefore serves numerous health benefits when used regularly. Supports healthy immune system Supports healthy inflammatory response Supports digestive & respiratory health Supports healthy blood sugar level Supports healthy blood pressure
(Black Cumin seed)
Minimum of 0.95% Thymoquinone (TQ)
Suggested/Recommended/Usage/Directions
Suggested use: As a dietary supplement, adults take one (1) to two (2) teaspoonfuls daily, with food or as directed by your qualified healthcare professional.
Precautions
Caution: For adults only, if you are pregnant, nursing, taking any medications or have any medical condition, consult your doctor before use.
Discontinue use and consult your doctor if any adverse reactions occur.
Keep out of the reach of children.
Do not use if safety seal is broken or missing.
Storage
Keep in cool, dark place away from direct heat & sun light.
FDA Disclaimer Statement
These statements have not been evaluated by the FDA. This product is not intended to cure, prevent, treat or diagnose any disease.
Seals/Symbols
Made in USA
GMP Good Manufacturing Practice Product
Formulation
Cold pressed oil
100% Pure Guaranteed
Solvent free Alcohol free
No artificial color, flavor or sweetener, no preservatives, no sugar, no starch, no corn, no egg, no lactose, no gluten, no wheat, no yeast, no fish. Sodium free.
FDA Statement of Identity
Dietary Supplement
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Black Seed by Best Naturals 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 Black Seed by Best Naturals
These are the 4 active ingredients this product is made of. Select any to open its full monograph.
Serving size5 Gram(s) Dosage formLiquid Servings per container47 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.
Gamma-Linolenic Acid
Oleic Acid
Interacts with86 drugs
Oleic acid is a heart-healthy monounsaturated fat found mainly in olive oil, canola oil, avocados, and nuts. As part of a Mediterranean-style diet, it...
Oleic Acid monograph & interactionsAlpha-Linolenic Acid
Black Cumin (seed) oil
Interacts with912 drugs
Black seed (Nigella sativa) is a traditional spice and remedy that has been studied for asthma, blood sugar, cholesterol, and blood pressure, with ear...
Black Cumin (seed) oil monograph & interactionsOther (inactive) ingredients: Freshly cold-pressed & unrefined virgin Black Cumin seed oil. These complete the product’s ingredient list but are not active constituents.
Black Seed by Best Naturals Drug Interactions
HelloPharmacist Interaction Report
Best Naturals Black Seed Liquid does interact with several categories of medications, and the interactions are documented as Moderate in severity.
The main concern is with CNS depressants (sedatives, sleep aids, anxiety medications) — black seed may add to their drowsy or sedating effects.
Read the full breakdown — every affected drug type, severity by severity
Black seed also interacts with serotonergic drugs (antidepressants like SSRIs, some migraine or weight-loss medications), raising a theoretical risk of serotonin syndrome. It may lower blood pressure when combined with antihypertensive medications (like amlodipine or metoprolol), and it can increase bleeding risk if you're on blood thinners (anticoagulants) or antiplatelet drugs like aspirin.
Additionally, it may lower blood sugar with diabetes medications and could interfere with immune-suppressing drugs after transplant.
Black seed may also reduce how well cyclosporine (an immunosuppressant) works in your body, and it could theoretically worsen potassium loss if you take water pills (diuretics). We could not check two of the four ingredients — gamma-linolenic acid and alpha-linolenic acid — so interactions from those are unknown.
Altogetherther, these interactions span 905 individual medications. Please use the medication checker on this page before you start, especially if you take any of the drug types mentioned above.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Black Seed?
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 Black Seed interact with 912 drugs. Click any drug to see the details.
2 of the 4 ingredients in Black Seed interact with drugs. Each result below shows which ingredient is responsible. Black Cumin (seed) oil Oleic Acid
6-mercaptopurinePurinethol
How 6-mercaptopurine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilImmunosuppressants Moderate
Interaction Summary
Theoretically, black seed might interfere with immunosuppressive therapy.
Read the full Black Cumin (seed) Oil + 6-mercaptopurine interactionAbciximabReoPro
How Abciximab interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black seed may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Black Cumin (seed) Oil + Abciximab interactionAbrocitinibCibinqo
How Abrocitinib interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilAnticoagulant/antiplatelet Drugs, Immunosuppressants +1 Moderate
Interaction Summary
Theoretically, black seed may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Black Cumin (seed) Oil + Abrocitinib interactionAcarboseGlucobay, Prandase, Precose
How Acarbose interacts with Black Seed — through 2 ingredients. Tap an ingredient for the detail:
Black Cumin (seed) OilAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking black seed with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full Black Cumin (seed) Oil + Acarbose interactionOleic AcidAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, oleic acid might increase the effects of antidiabetes drugs.
Read the full Oleic Acid + Acarbose interactionAcebutololRhotral, Sectral
How Acebutolol interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilAntihypertensive Drugs Moderate
Interaction Summary
Theoretically, taking black seed with antihypertensive drugs might increase the risk of hypotension.
Read the full Black Cumin (seed) Oil + Acebutolol interactionAcenocoumarolSintrom
How Acenocoumarol interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black seed may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Black Cumin (seed) Oil + Acenocoumarol interactionAcepromazineAtravet
How Acepromazine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin (seed) Oil + Acepromazine interactionAcetaminophen, AspirinGemnisyn
How Acetaminophen, Aspirin interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black seed may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Black Cumin (seed) Oil + Acetaminophen, Aspirin interactionAcetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
How Acetaminophen, Aspirin, Caffeine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilAnticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black seed may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
Read the full Black Cumin (seed) Oil + Acetaminophen, Aspirin, Caffeine interactionAcetaminophen, Butalbital, Caffeine, CodeineEsgic with Codeine, Fioricet w/ Codeine
How Acetaminophen, Butalbital, Caffeine, Codeine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin (seed) Oil + Acetaminophen, Butalbital, Caffeine, Codeine interactionAcetaminophen, Butalbital, CodeineBancap w/ Codeine
How Acetaminophen, Butalbital, Codeine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin (seed) Oil + Acetaminophen, Butalbital, Codeine interactionAcetaminophen, Butalbital, Codeine PhosphatePhrenilin #3
How Acetaminophen, Butalbital, Codeine Phosphate interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin (seed) Oil + Acetaminophen, Butalbital, Codeine Phosphate interactionAcetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, PhenylephrineHycomine Compound
How Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin (seed) Oil + Acetaminophen, Caffeine, Chlorpheniramine, Hydrocodone, Phenylephrine interactionAcetaminophen, Caffeine, CodeineGesic C15, Gesic C30, Gesic C8, Lenoltec 1, Lenoltec 2, Lenoltec 3 +1 more
How Acetaminophen, Caffeine, Codeine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin (seed) Oil + Acetaminophen, Caffeine, Codeine interactionAcetaminophen, Caffeine, Codeine, SalicylamideCodalan No.1, Codalan No.2, Codalan No.3
How Acetaminophen, Caffeine, Codeine, Salicylamide interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin (seed) Oil + Acetaminophen, Caffeine, Codeine, Salicylamide interactionAcetaminophen, Caffeine, DihydrocodeineDHC Plus, Panlor DC, Panlor SS
How Acetaminophen, Caffeine, Dihydrocodeine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin (seed) Oil + Acetaminophen, Caffeine, Dihydrocodeine interactionAcetaminophen, Caffeine, PyrilamineMidol Max Strength Menstrual
How Acetaminophen, Caffeine, Pyrilamine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilDiuretic Drugs Moderate
Interaction Summary
Theoretically, taking black seed with diuretic drugs might increase potassium loss and the risk of hypokalemia.
Read the full Black Cumin (seed) Oil + Acetaminophen, Caffeine, Pyrilamine interactionAcetaminophen, Chlorpheniramine Maleate, Dextromethorphan HbrVicks Formula 44M Cough, Cold & Flu Relief
How Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine Maleate, Dextromethorphan Hbr interactionAcetaminophen, Chlorpheniramine, Codeine, PhenylephrineColrex
How Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs, Cns Depressants Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Codeine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, DextromethorphanCoricidin II Extra Strength Cold and Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Dextromethorphan interactionAcetaminophen, Chlorpheniramine, Dextromethorphan HydrobromideCoricidin HBP Maximum Strength Flu
How Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Dextromethorphan Hydrobromide interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PhenylpropanolamineMulti Symptom Cold Relief
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Dextromethorphan, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Dextromethorphan, PseudoephedrineChildren's Tylenol Cold Plus Cough, Tylenol Cold Ex Strength
How Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, SalicylamideRhinogesic GG
How Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Guaifenesin, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylephrineAlka-Seltzer PLUS, Histex SR, Protid
How Acetaminophen, Chlorpheniramine, Phenylephrine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Phenylephrine interactionAcetaminophen, Chlorpheniramine, Phenylephrine, SalicylamideRhinogesic, Rhinogesic JR
How Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Phenylephrine, Salicylamide interactionAcetaminophen, Chlorpheniramine, PhenylpropanolamineAlumadrine, Conex, Sinadrin Max Strength, Sinulin
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Phenylpropanolamine interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, OpiumHista-Derfule
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs, Cns Depressants Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Opium interactionAcetaminophen, Chlorpheniramine, Phenylpropanolamine, PhenyltoloxamineNorel Plus
How Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Phenylpropanolamine, Phenyltoloxamine interactionAcetaminophen, Chlorpheniramine, PseudoephedrineAlka-Seltzer PLUS Liquid Gels, Children's Tylenol Cold, Codimal, Comtrex, Extra Strength Tylenol Allergy Sinus, Lorsin +3 more
How Acetaminophen, Chlorpheniramine, Pseudoephedrine interacts with Black Seed — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin (seed) OilSerotonergic Drugs Moderate
Interaction Summary
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Read the full Black Cumin (seed) Oil + Acetaminophen, Chlorpheniramine, Pseudoephedrine interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Black Seed 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.
Black Cumin (seed) oil
Anticoagulant/Antiplatelet Drugs
Theoretically, black seed may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
In vitro and animal research suggests that black seed extract can inhibit platelet aggregation and clotting, and increase bleeding time. In addition, decreased platelet counts have occurred in a human case report and in animal research.
Antidiabetes Drugs
Theoretically, taking black seed with antidiabetes drugs might increase the risk of hypoglycemia.
Some clinical research and numerous animal studies suggest that black seed, especially its constituent thymoquinone, can have hypoglycemic effects.
Antihypertensive Drugs
Theoretically, taking black seed with antihypertensive drugs might increase the risk of hypotension.
Clinical research suggests that black seed powder and oil might reduce blood pressure by 2-3 mmHg. In animal research, black seed modestly reduces blood pressure and concomitant use of black seed and amlodipine (Norvasc) or metoprolol (Lopressor) increased the blood pressure lowering effects of these drugs.
Clopidogrel (Plavix)
Theoretically, black seed may increase the risk of bleeding if used with clopidogrel.
Animal research shows that taking black seed extract daily for 2 weeks prior to a single dose of clopidogrel increases maximum concentrations of clopidogrel by approximately 31% and modestly decreases oral clearance. Furthermore, bleeding time was increased by 12%. This has not been shown in humans.
Cns Depressants
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Animal research suggests that black seed may have CNS depressant effects.
Cyclosporine (Neoral, Sandimmune)
Theoretically taking black seed might reduce the levels and clinical effects of cyclosporine.
In animal research, black seed extract decreased the maximal levels of cyclosporine in the blood by 35.5%. This has not been shown in humans.
Cytochrome P450 2C9 (Cyp2C9) Substrates
Theoretically, black seed might increase levels of drugs metabolized by CYP2C9.
In vitro research suggests that thymoquinone, a constituent of black seed, can decrease the metabolism of phenytoin by a mechanism possibly related to the inhibition of CYP2C9. The effect of black seed on CYP2C9 is unclear. This has not been shown in humans.
Diuretic Drugs
Theoretically, taking black seed with diuretic drugs might increase potassium loss and the risk of hypokalemia.
Black seed extract has shown diuretic effects in animals, which could theoretically increase potassium loss. This has not been shown in humans.
Immunosuppressants
Theoretically, black seed might interfere with immunosuppressive therapy.
Animal and in vitro studies suggest that black seed might stimulate immune function. However, other animal studies suggest that black seed may suppress immune function.
Phenytoin (Dilantin)
Theoretically, black seed might increase or decrease levels and effects of phenytoin.
In vitro research suggests that thymoquinone, a constituent of black seed, can decrease the metabolism of phenytoin. This effect may be due to inhibition of cytochrome P450 2C9 (CYP2C9). However, animal research shows that black seed decreases the maximum concentration of and total systemic exposure to phenytoin by 57% and 87%, respectively. This seems to be related to increased clearance and steady state volume of distribution. This interaction has not been shown in humans.
Serotonergic Drugs
Theoretically, combining serotonergic drugs with black seed might increase the risk of serotonergic side effects, including serotonin syndrome and cerebral vasoconstrictive disorders.
Animal research suggests that black seed can increase brain serotonin levels. In one case report, a 35-year-old man undergoing endoscopic surgery experienced immediate postoperative serotonin syndrome that was likely associated with the use of black seed oil 600 mg daily starting 4 days before surgery, and precipitated by the use of serotonergic pain medications, including fentanyl and oxycodone. Monitor patients for signs of serotonin syndrome and other serotonergic side effects if using black seed with serotonergic drugs.
Sildenafil (Viagra)
Theoretically, black seed might reduce plasma levels and the therapeutic effects of sildenafil.
Animal research shows that black seed reduces the total systemic exposure to sildenafil by 43%. So far, this interaction has not been reported in humans.
Warfarin (Coumadin)
Theoretically, black seed might increase levels of warfarin and increase the risk of bleeding.
In vitro research suggests that thymoquinone, a constituent of black seed, can decrease the metabolism of warfarin. This effect may be due to inhibition of cytochrome P450 2C9 (CYP2C9). The effect of black seed on warfarin metabolism is unclear. This has not been shown in humans.
Prednisolone
Theoretically black seed might reduce plasma levels and therapeutic effects of prednisolone.
In animal research, oral administration of a single dose of black seed oil 15 minutes prior to oral prednisolone decreases the prednisolone maximum plasma concentration by 65% and area under the curve by 25%. This has not been shown in humans.
Oleic Acid
Antidiabetes Drugs
Theoretically, oleic acid might increase the effects of antidiabetes drugs. Preliminary clinical research in patients with type 2 diabetes taking oral hypoglycemic drugs shows that eating a diet rich in oleic acid from olive oil decreases fasting blood glucose levels when compared to eating a diet rich in linoleic acid from sunflower oil. It is unknown if taking oleic acid supplements would have this effect or if this change is clinically significant. Until more is known, use caution. Dose adjustment may be necessary. Some antidiabetes drugs include glimepiride (Amaryl), glyburide (DiaBeta, Glynase PresTab, Micronase), insulin, metformin (Glucophage), pioglitazone (Actos), rosiglitazone (Avandia), and others.
Brand information
Manufacturer and brand details for Black Seed, from the product label.
Best Naturals
See all Best Naturals products- Name
- Best Naturals
- Street Address
- PO Box 394
- City
- Kenilworth
- State
- NJ
- ZipCode
- 07033
- Phone Number
- 1-877-659-6004
- Web Address
- www.shopbestnaturals.com
Black Seed by Best Naturals: Common Questions
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The Full Monographs Behind Black Seed’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Oleic Acid
Interacts with 86 drugsOleic acid is a heart-healthy monounsaturated fat found mainly in olive oil, canola oil, avocados, and nuts. As part of a Mediterranean-style diet, it is widely viewed as a healthier replace...
Read the full Oleic Acid monograph → Herb & supplement monographBlack Seed
Interacts with 912 drugsBlack seed (Nigella sativa) is a traditional spice and remedy that has been studied for asthma, blood sugar, cholesterol, and blood pressure, with early research showing some promise but no...
Read the full Black Seed monograph →Sources & How We Checked
Black Seed'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 79 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.
Oleic Acid 19 references
- Madigan C, Ryan M, Owens D, et al. Dietary unsaturated fatty acids in type 2 diabetes: higher levels of postprandial lipoprotein on a linoleic acid-rich sunflower oil diet compared with an oleic acid-rich olive oil diet. Diabetes Care 2000;23:1472-7. PubMed
- Gillingham, L. G., Gustafson, J. A., Han, S. Y., Jassal, D. S., and Jones, P. J. High-oleic rapeseed (canola) and flaxseed oils modulate serum lipids and inflammatory biomarkers in hypercholesterolaemic subjects. Br J Nutr 2011;105(3):417-427. PubMed
- Jones PJ, Senanayake VK, Pu S, Jenkins DJ, Connelly PW, Lamarche B, Couture P, Charest A, Baril-Gravel L, West SG, Liu X, Fleming JA, McCrea CE, Kris-Etherton PM. DHA-enriched high-oleic acid canola oil improves lipid profile and lowers predicted cardiova
- Cater, N. B., Heller, H. J., and Denke, M. A. Comparison of the effects of medium-chain triacylglycerols, palm oil, and high oleic acid sunflower oil on plasma triacylglycerol fatty acids and lipid and lipoprotein concentrations in humans. Am.J Clin.Nutr PubMed
- Mozaffarian D, Clarke R. Quantitative effects on cardiovascular risk factors and coronary heart disease risk of replacing partially hydrogenated vegetable oils with other fats and oils. Eur J Clin Nutr. 2009;63(Suppl 2):S22-33. PubMed
- Cao Y, Hou L, Wang W. Dietary total fat and fatty acids intake, serum fatty acids and risk of breast cancer: A meta-analysis of prospective cohort studies. Int J Cancer. 2016;138(8):1894-904. doi: 10.1002/ijc.29938. PubMed
- FDA completes review of qualified health claim petition for oleic acid and the risk of coronary heart disease. November 2018. Available at: www.fda.gov/Food/NewsEvents/ConstituentUpdates/ucm624758.htm. Accessed January 25, 2019.
- Liu X, Kris-Etherton PM, West SG, et al. Effects of canola and high-oleic-acid canola oils on abdominal fat mass in individuals with central obesity. Obesity. 2016;24(11):2261-2268. PubMed
- Bowen KJ, Kris-Etherton PM, West SG, et al. Diets enriched with conventional or high-oleic acid canola oils lower atherogenic lipids and lipoproteins compared to a diet with a western fatty acid profile in adults with central adiposity. J Nutr. 2019;149(3 PubMed
- Steffen BT, Duprez D, Szklo M, Guan W, Tsai MY. Circulating oleic acid levels are related to greater risks of cardiovascular events and all-cause mortality: The Multi-Ethnic Study of Atherosclerosis. J Clin Lipidol. 2018;12(6):1404-1412. PubMed
- Banim PJ, Luben R, Khaw KT, Hart AR. Dietary oleic acid is inversely associated with pancreatic cancer - Data from food diaries in a cohort study. Pancreatology. 2018;18(6):655-660. PubMed
- Morin SJ, Gaziano JM, Djoussé L. Relation between plasma phospholipid oleic acid and risk of heart failure. Eur J Nutr. 2018;57(8):2937-2942. PubMed
- Samieri C, Féart C, Proust-Lima C, et al. Olive oil consumption, plasma oleic acid, and stroke incidence: the Three-City Study. Neurology. 2011;77(5):418-25. PubMed
- Compher CW, Kinosian BP, Rubesin SE, Ratcliffe SJ, Metz DC. Energy absorption is reduced with oleic acid supplements in human short bowel syndrome. JPEN J Parenter Enteral Nutr. 2009;33(1):102-8. PubMed
- Ben Fradj MK, Ouanes Y, Hadj-Taieb S, et al. Decreased oleic acid and marine n?-?3 polyunsaturated fatty acids in Tunisian patients with urothelial bladder cancer. Nutr Cancer. 2018;70(7):1043-1050.
- de Silva PS, Luben R, Shrestha SS, Khaw KT, Hart AR. Dietary arachidonic and oleic acid intake in ulcerative colitis etiology: a prospective cohort study using 7-day food diaries. Eur J Gastroenterol Hepatol. 2014;26(1):11-8. PubMed
- Higashi K, Shige H, Ito T, et al. Effect of a low-fat diet enriched with oleic acid on postprandial lipemia in patients with type 2 diabetes mellitus. Lipids. 2001;36(1):1-6. PubMed
- Lin HC, van Citters GW, Heimer F, Bonorris G. Slowing of gastrointestinal transit by oleic acid: a preliminary report of a novel, nutrient-based treatment in humans. Dig Dis Sci. 2001;46(2):223-9. PubMed
- Li D, Tong Y, Li Y. Associations between dietary oleic acid and linoleic acid and depressive symptoms in perimenopausal women: The Study of Women's Health Across the Nation. Nutrition. 2020 Mar;71:110602. PubMed
Black Seed 60 references
- The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
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- Keshri G, Singh MM, Lakshmi V, Kamboj VP. Post-coital contraceptive efficacy of the seeds of Black seed in rats. Indian J Physiol Pharmacol 1995;39:59-62.
- Tennekoon KH, Jeevathayaparan S, Kurukulasooriya AP, Karunanayake EH. Possible hepatotoxicity of Nigella sativa seeds and Dregea volubilis leaves. J Ethnopharmacol 1991;31:283-9. PubMed
- Dehkordi FR, Kamkhah AF. Antihypertensive effect of Nigella sativa seed extract in patients with mild hypertension. Fundam Clin Pharmacol 2008;22:447-52.
- Zaoui, A., Cherrah, Y., Lacaille-Dubois, M. A., Settaf, A., Amarouch, H., and Hassar, M. [Diuretic and hypotensive effects of Nigella sativa in the spontaneously hypertensive rat]. Therapie 2000;55(3):379-382.
- Enomoto, S., Asano, R., Iwahori, Y., Narui, T., Okada, Y., Singab, A. N., and Okuyama, T. Hematological studies on black cumin oil from the seeds of Nigella sativa L. Biol.Pharm.Bull 2001;24(3):307-310. PubMed
- Meral, I., Yener, Z., Kahraman, T., and Mert, N. Effect of Nigella sativa on glucose concentration, lipid peroxidation, anti-oxidant defence system and liver damage in experimentally-induced diabetic rabbits. J Vet.Med A Physiol Pathol.Clin Med 2001;48(1
- Al Jishi, S. A. and Abuo, Hozaifa B. Effect of Nigella sativa on blood hemostatic function in rats. J Ethnopharmacol. 2003;85(1):7-14. PubMed
- Ali, B. H. and Blunden, G. Pharmacological and toxicological properties of Nigella sativa. Phytother.Res. 2003;17(4):299-305.
- Al Naggar, T. B., Gomez-Serranillos, M. P., Carretero, M. E., and Villar, A. M. Neuropharmacological activity of Nigella sativa L. extracts. J Ethnopharmacol. 2003;88(1):63-68. PubMed
- Kalus, U., Pruss, A., Bystron, J., Jurecka, M., Smekalova, A., Lichius, J. J., and Kiesewetter, H. Effect of Nigella sativa (black seed) on subjective feeling in patients with allergic diseases. Phytother.Res. 2003;17(10):1209-1214.
- Islam, S. N., Begum, P., Ahsan, T., Huque, S., and Ahsan, M. Immunosuppressive and cytotoxic properties of Nigella sativa. Phytother.Res. 2004;18(5):395-398.
- Fararh, K. M., Atoji, Y., Shimizu, Y., Shiina, T., Nikami, H., and Takewaki, T. Mechanisms of the hypoglycaemic and immunopotentiating effects of Nigella sativa L. oil in streptozotocin-induced diabetic hamsters. Res Vet.Sci 2004;77(2):123-129. PubMed
- Awad, E. M. and Binder, B. R. In vitro induction of endothelial cell fibrinolytic alterations by Nigella sativa. Phytomedicine 2005;12(3):194-202. PubMed
- El Obeid, A., Al Harbi, S., Al Jomah, N., and Hassib, A. Herbal melanin modulates tumor necrosis factor alpha (TNF-alpha), interleukin 6 (IL-6) and vascular endothelial growth factor (VEGF) production. Phytomedicine. 2006;13(5):324-333.
- Abbas, A. T., Abdel-Aziz, M. M., Zalata, K. R., and Tel, Abd Al-Galel. Effect of dexamethasone and Nigella sativa on peripheral blood eosinophil count, IgG1 and IgG2a, cytokine profiles and lung inflammation in murine model of allergic asthma. Egypt J Im
- Kaleem, M., Kirmani, D., Asif, M., Ahmed, Q., and Bano, B. Biochemical effects of Nigella sativa L seeds in diabetic rats. Indian J Exp.Biol. 2006;44(9):745-748.
- Hawsawi, Z. A., Ali, B. A., and Bamosa, A. O. Effect of Nigella sativa (Black Seed) and thymoquinone on blood glucose in albino rats. Ann.Saudi Med 2001;21(3-4):242-244.
- Massadeh, A. M., Al Safi, S. A., Momani, I. F., Al Mahmoud, M., and Alkofahi, A. S. Analysis of cadmium and lead in mice organs: effect of Nigella sativa L. (Black Cumin) on the distribution and immunosuppressive effect of cadmium-lead mixture in mice. B PubMed
- Akhondian, J., Parsa, A., and Rakhshande, H. The effect of Nigella sativa L. (black cumin seed) on intractable pediatric seizures. Med Sci Monit. 2007;13(12):CR555-CR559.
- Meddah, B., Ducroc, R., El Abbes, Faouzi M., Eto, B., Mahraoui, L., Benhaddou-Andaloussi, A., Martineau, L. C., Cherrah, Y., and Haddad, P. S. Nigella sativa inhibits intestinal glucose absorption and improves glucose tolerance in rats. J Ethnopharmacol. PubMed
- Najmi, A., Nasiruddin, M., Khan, R. A., and Haque, S. F. Effect of Nigella sativa oil on various clinical and biochemical parameters of insulin resistance syndrome. Int J Diabetes Dev.Ctries. 2008;28(1):11-14.
- al Sheikh, O. A. and Gad el-Rab, M. O. Allergic contact dermatitis: clinical features and profile of sensitizing allergens in Riyadh, Saudi Arabia. Int J Dermatol. 1996;35(7):493-497.
- Steinmann, A., Schatzle, M., Agathos, M., and Breit, R. Allergic contact dermatitis from black cumin (Nigella sativa) oil after topical use. Contact Dermatitis 1997;36(5):268-269.
- Al-Jenoobi FI, Al-Suwayeh SA, Muzaffar I, et al. Effects of Nigella sativa and Lepidium sativum on cyclosporine pharmacokinetics. Biomed Res Int 2013;2013:953520.
- Arslan E, Sayin S, Demirbas S, et al. A case study report of acute renal failure associated with Nigella sativa in a diabetic patient. J Integr Med 2013;11:64-6. PubMed
- Bamosa AO, Kaatabi H, Lebdaa FM, et al. Effect of Nigella sativa seeds on the glycemic control of patients with type 2 diabetes mellitus. Indian J Physiol Pharmacol 2010;54:344-54.
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- Kaatabi H, Bamosa AO, Badar A, et al. Nigella sativa improves glycemic control and ameliorates oxidative stress in patients with type 2 diabetes mellitus: placebo controlled participant blinded clinical trial. PLoS One 2015;10:e0113486. PubMed
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Parts of this content are provided by the Therapeutic Research Center, LLC.
DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
© 2021 Therapeutic Research Center, LLC