Interactions on record — worth a quick check against your medications. Based on 1 of 4 ingredients. Check your meds →
Dietary supplement

Black Currant Oil Ingredients & Drug Interactions

by Pure Herbs

Black Currant Oil label
See full label image
Softgel Capsule Category: Fat/fatty Acid
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

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

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

The interaction bottom line Most serious interaction: Moderate

Black Currant Oil is a dietary supplement by Pure Herbs with 4 active ingredients. Its ingredients are commonly taken for dry eyes and eye strain, joint pain and inflammation, immune and general wellness support.Based on those ingredients, 140 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Black Currant Seed Oil. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Black Currant Oil by Pure Herbs

Ask about any prescription or over-the-counter medication and we check it for interactions with Black Currant Oil by Pure Herbs — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Black Currant Oil by Pure Herbs

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Jul 16, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 4 of its 4 active ingredients.
  • No proprietary blends here — you can verify the dose of every single component.

Pure Herbs Black Currant Oil is a softgel supplement containing 4 active ingredients, three of which are fatty acids naturally present in black currant seeds: gamma-linolenic acid, linoleic acid, and alpha-linolenic acid. The fourth active ingredient is black currant seed oil itself.

The capsules are made from gelatin, glycerin, and purified water.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

This is a single-ingredient Black Currant product and its label doesn't state a use — see Black Currant's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence we hold doesn't support black currant oil for Alzheimer disease, liver disease, upper respiratory tract infections, cough, or atopic dermatitis (eczema) — the data is insufficient to rate it for any of these uses. If you're considering this product for one of these conditions, talk with your doctor about whether it's a reasonable choice for you.

The evidence, ingredient by ingredient Black Currant

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Black currant berries as food are generally well tolerated, but concentrated supplements like this one are less studied and warrant caution. In a trial of over 2,000 people taking black currant seed oil at a standard dose, a small number reported mild diarrhea 2 to 10 days after starting — it was mild and manageable.

Because long-term safety data on supplements is limited, check with your doctor or pharmacist before you start, especially if you're pregnant, breastfeeding, or have any chronic health conditions.

Side effects, ingredient by ingredient Black Currant

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Black Currant.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 140 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking Pure Herbs Black Currant Oil, double-check with your doctor or pharmacist if you take blood thinners or antiplatelet drugs (like warfarin, clopidogrel, or aspirin) — there is a moderate risk of increased bleeding. Also check if you take phenothiazines, an older psychiatric medication — there is a moderate theoretical concern about seizure risk, though no cases have been reported.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Black Currant Oil by Pure Herbs may be worth considering if you've researched it for a specific reason, but the evidence we hold doesn't yet support its use for common claims like immunity or joint health. The main caution is interactions with blood thinners and psychiatric medications — check your exact medications with your doctor or pharmacist before you start.

Because concentrated supplements have limited safety data, a conversation with your healthcare provider is a smart first step.

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

Assessment coverage: 1 of 4 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Nov 22, 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

At a glance

General information

Key facts about Black Currant Oil, straight from the product label.

Brand Pure Herbs
Net contents 50 Softgel(s)
Market status On market
Date entered into DSLD Nov 22, 2022
DSLD ID 279896
Product type Fat/fatty Acid
Supplement form Softgel Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating)
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Black Currant Oil by Pure Herbs, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Softgel(s)
Maximum serving Sizes:
1 Softgel(s)
Servings per container
50
IngredientAmount% DV
Gamma-Linolenic Acid70 mg--
Linoleic Acid215 mg--
Alpha-Linolenic Acid60 mg--
Black Currant Seed Oil500 mg--

Other ingredients: Gelatin, Glycerin, Water, Purified

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Suggested/Recommended/Usage/Directions

Suggested use: Take one softgel each day with a meal or as directed by your health care practitioner.

Formula

Provides 200 mg of essential fatty acids from a natural source.

Essential Fatty Acids

FDA Disclaimer Statement

This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Precautions

Warning: Not intended for use by pregnant or nursing women. If you have a medical condition or are taking medication, consult your doctor prior to use.

Discontinue use and consult with your doctor if any adverse reactions occur.

Keep out of reach of children

Brand IP Statement(s)

Pure Herbs, Ltd. Natural Herbal Extracts

FDA Statement of Identity

Dietary Supplement

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

See for yourself

Black Currant Oil by Pure Herbs label

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

Black Currant Oil label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Black Currant Oil by Pure Herbs

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

Serving size1 Softgel(s) Dosage formSoftgel Capsule Servings per container50 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

70 mg per serving

Linoleic Acid

215 mg per serving

Alpha-Linolenic Acid

60 mg per serving

Black Currant Seed Oil

Interacts with
140 drugs
500 mg per serving

Black currant is a nutritious berry that is rich in vitamin C and antioxidants, and its seed oil contains the omega-6 fatty acid GLA. While it is enjo...

Black Currant Seed Oil monograph & interactions

Other (inactive) ingredients: Gelatin, Glycerin, Water, Purified. These complete the product’s ingredient list but are not active constituents.

Interaction report

Black Currant Oil by Pure Herbs Drug Interactions

Want to check YOUR meds against Black Currant Oil?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
140Drugs
140 Moderate

Ingredients driving the most interactions

Black Currant Seed Oil 140

Individual Drug Interactions

The ingredients in Black Currant Oil interact with 140 drugs. Click any drug to see the details.

1 of the 4 ingredients in Black Currant Oil interact with drugs. Each result below shows which ingredient is responsible. Black Currant Seed Oil

Each ingredient & the kinds of drugs it affects

For each ingredient in Black Currant Oil 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 Currant Seed Oil2 drug types · 140 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.
Gamma-linolenic acid (GLA), a constituent of black currant seed oil, appears to have antiplatelet effects.

Likelihood Possible Evidence D
Phenothiazines

Theoretically, black currant seed oil might increase the risk of seizure in patients receiving phenothiazines.
Black currant seed oil contains gamma-linolenic acid (GLA). There is some concern that taking supplements containing GLA might cause seizures, or lower the seizure threshold, when taken with phenothiazines, although there is no evidence that black currant seed oil causes seizures. In one report, three patients with schizophrenia who had received phenothiazines developed EEG changes suggestive of temporal lobe epilepsy after starting treatment with GLA, although none experienced an actual seizure. In another report, two patients with schizophrenia who were stabilized on phenothiazines developed seizures when evening primrose 4 grams daily, which contains GLA, was added. One of these patients had a prior history of seizures.

Likelihood Possible Evidence D
Black Currant Seed Oil full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Black Currant Oil, from the product label.

Pure Herbs

See all Pure Herbs products
Name
Pure Herbs, Ltd.
City
Sterling Heights
State
MI
Phone Number
(800) 860-4372
Web Address
www.pureherbs.com
Pharmacist Counseling Corner

Black Currant Oil by Pure Herbs: Common Questions

Does Black Currant Oil by Pure Herbs interact with any medications?
Yes. Based on its ingredients, Black Currant Oil has a known interaction with 140 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Black Currant Oil contains 4 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Can I take this if I'm on aspirin or another blood thinner?
Not without checking first. Black currant seed oil may increase your bleeding risk when combined with blood thinners or antiplatelet drugs. Talk with your doctor or pharmacist before you start — they know your full medication list and can advise you.
Does black currant oil really work for colds or cough?
The evidence we hold is insufficient to say whether it helps with upper respiratory infections or cough. You'd need to discuss what the research shows with your doctor if you're thinking about trying it for these uses.
What's the main side effect I should know about?
In a large trial, a small number of people reported mild diarrhea a few days after starting — it was manageable and not severe. Other side effects weren't widely reported in the data we have.
Is it safe to take while pregnant or breastfeeding?
There isn't enough data on concentrated black currant supplements during pregnancy and breastfeeding to know either way. Talk with your doctor or pharmacist before you take it — they can give you personalized advice based on your situation.
Does the softgel capsule have anything I need to know about?
The capsule itself is made from gelatin, glycerin, and purified water. If you avoid gelatin (for dietary or religious reasons), this product isn't for you.

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

Not sure if Black Currant Oil is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.

Black Currant Oil label
Go deeper

The Full Monographs Behind Black Currant Oil’s Ingredients

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

Herb & supplement monograph

Black Currant

Interacts with 140 drugs

Black currant is a nutritious berry that is rich in vitamin C and antioxidants, and its seed oil contains the omega-6 fatty acid GLA. While it is enjoyed safely as a food and is popular as a...

Read the full Black Currant monograph →
Sources

Sources & How We Checked

Black Currant Oil's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 6 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 Currant 6 references
  1. Guivernau M, Meza N, Barja P, Roman O. Clinical and experimental study on the long-term effect of dietary gamma-linolenic acid on plasma lipids, platelet aggregation, thromboxane formation, and prostacyclin production. Prostaglandins Leukot Essent Fatty A PubMed
  2. Fa-lin Z, Zhen-yu W, Yan H, et al. Efficacy of blackcurrant oil soft capsule, a Chinese herbal drug, in hyperlipidemia treatment. Phytother Res 2010;24 Suppl 2:S209-13. PubMed
  3. Holman CP and Bell AF. A trial of evening primrose oil in the treatment of chronic schizophrenia. J Orhtomolecular Psych 1983;12:302-304.
  4. Vaddadi KS. The use of gamma-linolenic acid and linoleic acid to differentiate between temporal lobe epilepsy and schizophrenia. Prostaglandins Med 1981;6(4):375-379. PubMed
  5. Norred, C. L. and Brinker, F. Potential coagulation effects of preoperative complementary and alternative medicines. Alt Ther 2001;7(6):58-67.
  6. Puri BK. The safety of evening primrose oil in epilepsy. Prostaglandins Leukotrienes Essential Fatty Acids 2007;77:101-3. PubMed

See these in context on the Black Currant monograph →

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

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