Black Cumin Ingredients & Drug Interactions
by Herbal Terra
What is this page for?
First and foremost: checking Black Cumin 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 Cumin is a dietary supplement by Herbal Terra with 1 active ingredient. Its ingredients are commonly taken for respiratory support (asthma, allergies, cough), digestive upset, immune support.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 Extract, Dry. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Black Cumin by Herbal Terra
Ask about any prescription or over-the-counter medication and we check it for interactions with Black Cumin by Herbal Terra — 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 Cumin by Herbal Terra
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 one active ingredient: Black Cumin Seed Extract, Dry. The liquid form includes alcohol, water, and glycerin as inactive ingredients to deliver the extract.
Does it work?
Moderate evidence
Black seed has possibly effective evidence for several uses: acne, hay fever (allergic rhinitis), asthma, and as a support for diabetes management. It also shows possibly effective evidence for Helicobacter pylori (a bacteria linked to stomach ulcers).
The strength of evidence for each condition is modest, so talk with your pharmacist or doctor about whether it's a good fit for what you're looking to address.
How safe is it?
Well-documented data
Black seed is generally well tolerated when taken by mouth or applied to skin. The most common side effects are gastrointestinal — constipation, nausea, vomiting, and stomach discomfort.
In clinical trials, stomach complaints were reported by a small number of participants; one patient required hospitalization for severe nausea and vomiting. One trial also noted heavier menstrual bleeding in one participant.
The safety data show that food amounts are likely safe, but supplement doses are less studied long-term. Larger medicinal doses are not advised in pregnancy, so avoid supplement-strength use if you're pregnant.
If you're breastfeeding, there isn't enough reliable information — talk with your doctor or pharmacist before using.
Meds to double-check
Moderate interaction found
Before you start, double-check with your pharmacist if you take blood thinners or antiplatelet drugs (warfarin, aspirin, clopidogrel), sedatives, antidepressants or other serotonergic drugs, blood pressure medications, diabetes drugs, diuretics, immunosuppressants, or cyclosporine. These are Moderate-severity interactions and need review of your specific doses and situation.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.
Black seed may help with acne, hay fever, asthma, or blood sugar support, but you need to check it carefully against your medications — especially blood thinners, blood pressure drugs, diabetes medications, and antidepressants. If you're pregnant or breastfeeding, discuss this with your pharmacist first.
Most side effects are stomach-related and mild, but they do happen.
Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI
Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Mar 25, 2025.
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 Cumin, straight from the product label.
| Brand | Herbal Terra |
|---|---|
| Barcode (UPC) | 7386004843946 |
| Net contents | 2 Fluid Ounce(s); 60 mL |
| Market status | On market |
| Date entered into DSLD | Mar 25, 2025 |
| DSLD ID | 324816 |
| Product type | Botanical |
| Supplement form | Liquid |
| Dietary claims / uses | 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 Cumin by Herbal Terra, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Black Cumin Seed Extract, Dry | 983 mg | -- |
Other ingredients: Alcohol, Water, Glycerin
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
Shake well before use. Adults take up to 30 drops (1 mL, one full squeeze of the dropper bulb) in 3-4 fl. oz. of juice or water up to 4 times a day.
Precautions
We recommend to seek expert medical advice before taking. May have contraindications and cause adverse reaction.
Consult a physician before giving to children under 18, before using during pregnancy, if nursing, or if you are on any medications.
Consult a physician before giving to children under 18, before using during pregnancy, if nursing, or if you are on any medications. Keep out of the reach of children!
Do not use if you are allergic to any ingredients.
Storage
Store in a cool, dry, dark place.
FDA Disclaimer Statement
This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure or prevent any disease.
Formulation
cGMP Made in compliance with cGMP 21 CFR 111 in an FDA registered and inspected facility.
Sugar free
Expertly extracted 100% natural Premium product
Organic alcohol
No artificial ingredients, color additives, fillers or binders.
Natural Gluten free
Formula
Nigella sativa
Organic alcohol
FDA Statement of Identity
Herbal Supplement
Seals/Symbols
Made in USA
General Statements
Organic raw material.
Is this label outdated? Report a formula or label change and our pharmacy team will review it.
Black Cumin by Herbal Terra 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 Cumin by Herbal Terra
This is the 1 active ingredient this product is made of. Select it to open its full monograph.
Serving size1 mL Dosage formLiquid Servings per container60 Amounts shown are per serving.
Black Cumin Seed Extract, Dry
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 Extract, Dry monograph & interactionsOther (inactive) ingredients: Alcohol, Water, Glycerin. These complete the product’s ingredient list but are not active constituents.
Black Cumin by Herbal Terra Drug Interactions
HelloPharmacist Interaction Report
Black Cumin by Herbal Terra has documented interactions with multiple medication types.
The most serious concern is with blood thinners and antiplatelet drugs (such as warfarin or aspirin) — black seed extract can inhibit clotting and increase bleeding time, raising the risk of abnormal bleeding.
Read the full breakdown — every affected drug type, severity by severity
Additionally, this product may interact with sedatives and other drugs that slow the central nervous system, increasing drowsiness. Serotonergic drugs (antidepressants like SSRIs, some migraine medications) carry a moderate risk of serotonin-related side effects, including serotonin syndrome.
Blood pressure medications, diabetes drugs, diuretics, and immunosuppressants all require caution — black seed may lower blood pressure further, raise low blood sugar risk, increase potassium loss, or interfere with immune-suppressing therapy.
Cyclosporine (an immunosuppressant used after transplant) is also a concern; animal data suggest black seed may reduce its effectiveness. Altogether, these interactions span 905 individual medications.
Use the medication checker on this page to verify your exact prescriptions before starting.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Black Cumin?
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 Cumin interact with 912 drugs. Click any drug to see the details.
1 of the 1 ingredient in Black Cumin interact with drugs. Each result below shows which ingredient is responsible. Black Cumin Seed Extract, Dry
Acetaminophen, Chlorzoxazone, CodeineAcetazone Forte C8, Parafon Forte C8
How Acetaminophen, Chlorzoxazone, Codeine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Chlorzoxazone, Codeine interactionAcetaminophen, CodeineTylenol No.3, Tylenol w/ Codeine
How Acetaminophen, Codeine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Codeine interactionAcetaminophen, Codeine, DoxylamineMersyndol
How Acetaminophen, Codeine, Doxylamine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Codeine, Doxylamine interactionAcetaminophen, Codeine, MethocarbamolAcetaminophen, Codeine, Methocarbamol, Robaxacet 8
How Acetaminophen, Codeine, Methocarbamol interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Codeine, Methocarbamol interactionAcetaminophen, DextromethorphanTylenol Cough Ex Strength
How Acetaminophen, Dextromethorphan interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DrySerotonergic 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 Extract, Dry + Acetaminophen, Dextromethorphan interactionAcetaminophen, Dextromethorphan, Doxylamine, PseudoephedrineVicks NyQuil
How Acetaminophen, Dextromethorphan, Doxylamine, Pseudoephedrine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DrySerotonergic 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 Extract, Dry + Acetaminophen, Dextromethorphan, Doxylamine, Pseudoephedrine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PhenylephrineConar-A
How Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DrySerotonergic 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 Extract, Dry + Acetaminophen, Dextromethorphan, Guaifenesin, Phenylephrine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PhenylpropanolamineAnatuss
How Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DrySerotonergic 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 Extract, Dry + Acetaminophen, Dextromethorphan, Guaifenesin, Phenylpropanolamine interactionAcetaminophen, Dextromethorphan, Guaifenesin, PseudoephedrineRobitussin Cold, Severe Cold, Suphedrine Cold/Cough
How Acetaminophen, Dextromethorphan, Guaifenesin, Pseudoephedrine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DrySerotonergic 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 Extract, Dry + Acetaminophen, Dextromethorphan, Guaifenesin, Pseudoephedrine interactionAcetaminophen, Dextromethorphan, Phenylpropanolamine, PyrilamineTheracaps
How Acetaminophen, Dextromethorphan, Phenylpropanolamine, Pyrilamine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DrySerotonergic 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 Extract, Dry + Acetaminophen, Dextromethorphan, Phenylpropanolamine, Pyrilamine interactionAcetaminophen, Dextromethorphan, PseudoephedrineAlka-Seltzer PLUS Flu Liquid Gels, Non Aspirin Cold Caps, Tylenol Cold, Tylenol Flu Daytime Ex Strength, Tylenol Flu Ex Strength
How Acetaminophen, Dextromethorphan, Pseudoephedrine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DrySerotonergic 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 Extract, Dry + Acetaminophen, Dextromethorphan, Pseudoephedrine interactionAcetaminophen, Dichloralantipyrine, IsomethepteneAmidrine, Midchlor, Migquin, Migratine
How Acetaminophen, Dichloralantipyrine, Isometheptene interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Dichloralantipyrine, Isometheptene interactionAcetaminophen, Dichloralphenazone, IsomethepteneMidrin
How Acetaminophen, Dichloralphenazone, Isometheptene interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Dichloralphenazone, Isometheptene interactionAcetaminophen, Dichlorophenazone, IsometheptaneIsocom
How Acetaminophen, Dichlorophenazone, Isometheptane interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Dichlorophenazone, Isometheptane interactionAcetaminophen, DiphenhydramineTylenol PM, Tylenol PM Ex Strength
How Acetaminophen, Diphenhydramine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Diphenhydramine interactionAcetaminophen, Diphenhydramine, PseudoephedrineChildren's Tylenol Allergy, Cold Control, Contac Night Allergy Relief
How Acetaminophen, Diphenhydramine, Pseudoephedrine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Diphenhydramine, Pseudoephedrine interactionAcetaminophen, HydrocodoneAnexsia, Anodynos DHC, Azdone, Co-Gesic, Doucet, Lorcet +9 more
How Acetaminophen, Hydrocodone interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Hydrocodone interactionAcetaminophen, IbuprofenCombogesic
How Acetaminophen, Ibuprofen interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCytochrome P450 2c9 (cyp2c9) Substrates, Anticoagulant/antiplatelet Drugs Moderate
Interaction Summary
Theoretically, black seed might increase levels of drugs metabolized by CYP2C9.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Ibuprofen interactionAcetaminophen, MeperidineDemerol APAP
How Acetaminophen, Meperidine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants, Serotonergic Drugs Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Meperidine interactionAcetaminophen, OxycodonePercocet, Roxicet, Tylox, Xartemis XR
How Acetaminophen, Oxycodone interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Oxycodone interactionAcetaminophen, Pamabrom, PyrilamineMidol Max Strength PMS, Pamprin, Pamprin ES
How Acetaminophen, Pamabrom, Pyrilamine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryDiuretic 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 Extract, Dry + Acetaminophen, Pamabrom, Pyrilamine interactionAcetaminophen, PentazocineTalacen
How Acetaminophen, Pentazocine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Pentazocine interactionAcetaminophen, Phenylephrine, ChlorpheniramineSuper Cold Tabs
How Acetaminophen, Phenylephrine, Chlorpheniramine interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DrySerotonergic 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 Extract, Dry + Acetaminophen, Phenylephrine, Chlorpheniramine interactionAcetaminophen, PropoxypheneDarvocet-N 100, Darvocet-N 50, E-Lor, Wygesic
How Acetaminophen, Propoxyphene interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetaminophen, Propoxyphene interactionAcetazolamideAk-Zol, Diamox
How Acetazolamide interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryCns Depressants, Antihypertensive Drugs +1 Moderate
Interaction Summary
Theoretically, concomitant use with drugs that have sedative properties may cause additive effects.
Read the full Black Cumin Seed Extract, Dry + Acetazolamide interactionAcetohexamideDymelor
How Acetohexamide interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryAntidiabetes Drugs Moderate
Interaction Summary
Theoretically, taking black seed with antidiabetes drugs might increase the risk of hypoglycemia.
Read the full Black Cumin Seed Extract, Dry + Acetohexamide interactionAcetylsalicylic AcidEntrophen
How Acetylsalicylic Acid interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryAnticoagulant/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 Extract, Dry + Acetylsalicylic Acid interactionAdalimumabHumira
How Adalimumab interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryImmunosuppressants Moderate
Interaction Summary
Theoretically, black seed might interfere with immunosuppressive therapy.
Read the full Black Cumin Seed Extract, Dry + Adalimumab interactionAdalimumab-adazHyrimoz
How Adalimumab-adaz interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryImmunosuppressants Moderate
Interaction Summary
Theoretically, black seed might interfere with immunosuppressive therapy.
Read the full Black Cumin Seed Extract, Dry + Adalimumab-adaz interactionAdalimumab-adbmCyltezo
How Adalimumab-adbm interacts with Black Cumin — through 1 ingredient. Tap an ingredient for the detail:
Black Cumin Seed Extract, DryImmunosuppressants Moderate
Interaction Summary
Theoretically, black seed might interfere with immunosuppressive therapy.
Read the full Black Cumin Seed Extract, Dry + Adalimumab-adbm interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Black Cumin with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.
Black Cumin Seed Extract, Dry
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.
Brand information
Manufacturer and brand details for Black Cumin, from the product label.
Herbal Terra
See all Herbal Terra products- Name
- Herbal Terra LLC
- Phone Number
- +18083857868
- Web Address
- herbalterra.com
Black Cumin by Herbal Terra: Common Questions
Does Black Cumin by Herbal Terra interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
What is black cumin seed extract, and what does it do?
What are the most common side effects?
Is it safe to take if I'm pregnant?
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Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Black Cumin 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 Black Cumin’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Black Cumin'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 60 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.
Black Seed 60 references
- The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
- Aqel M, Shaheen R. Effects of the volatile oil of black seed seeds on the uterine smooth muscle of rat and guinea pig. J Ethnopharmacol 1996;52:23-6.
- 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.
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DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.
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