Herb & supplement monograph

Black Currant Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by ·Updated July 2026
What is this page for?

First and foremost: how Black Currant interacts with medications. The heart of this page is the interaction list — every drug Black Currant is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Black Currant is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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On this page

Black Currant Drug Interactions: The Bottom Line

From the HelloPharmacist Editorial Team · Updated July 2026

Based on the available evidence, the overall risk of a clinically significant Black Currant drug interaction appears low for most people. None of the listed interactions are rated major, and all of them rest on theoretical concerns rather than documented problems in people.

Interactions deserving the most attention

The combinations most worth attention involve anticoagulant or antiplatelet drugs, because a fatty acid in black currant seed oil may have mild blood-thinning effects that could add to medications affecting bleeding. There is also a theoretical concern with phenothiazines, a group of antipsychotic medicines, since that same fatty acid has been linked to a possible lowering of the seizure threshold, though black currant seed oil itself has not been shown to cause seizures. Neither concern is backed by strong human evidence.

What the rest of the list means

Although the list of interacting medications is long, that does not mean each combination is harmful. Nearly all of these entries trace back to the same theoretical concerns about one component of black currant seed oil, based mostly on lab research. So far, these predicted effects have not been confirmed as meaningful problems in people.

Check your medications against Black Currant

Based on HelloPharmacist’s Black Currant interaction data and reviewed under our editorial standards.

Interaction report

Drugs that interact with Black Currant

140 medications have a known interaction with Black Currant, graded by severity. Select any drug for the full evidence-based detail.

2,830 drugs
AbciximabReoPro
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Abciximab interaction
AbrocitinibCibinqo
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Abrocitinib interaction Abrocitinib drug page: uses, dosage & side effects
AcenocoumarolSintrom
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Acenocoumarol interaction
AcepromazineAtravet
Moderate Phenothiazines

Theoretically, black currant seed oil might increase the risk of seizure in patients receiving phenothiazines.

Read the full Black Currant + Acepromazine interaction
Acetaminophen, AspirinGemnisyn
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Acetaminophen, Aspirin interaction
Acetaminophen, Aspirin, CaffeineExcedrin, Excedrin Extra Strength, Excedrin Migraine
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Acetaminophen, Aspirin, Caffeine interaction
Acetaminophen, IbuprofenCombogesic
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Acetaminophen, Ibuprofen interaction
Acetylsalicylic AcidEntrophen
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Acetylsalicylic Acid interaction Acetylsalicylic Acid drug page: uses, dosage & side effects
Alteplase, TpaActilyse, Activase
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Alteplase, Tpa interaction
Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #2
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aluminum Hydroxide, Aspirin, Codeine Phosphate, Magnesium Hydroxide interaction
Aluminum Hydroxide, Aspirin, Magnesium HydroxideAscriptin
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aluminum Hydroxide, Aspirin, Magnesium Hydroxide interaction Aluminum Hydroxide, Aspirin, Magnesium Hydroxide drug page: uses, dosage & side effects
Amitriptyline, PerphenazineEtrafon, Etrafon-A, Etrafon-Forte, Triavil
Moderate Phenothiazines

Theoretically, black currant seed oil might increase the risk of seizure in patients receiving phenothiazines.

Read the full Black Currant + Amitriptyline, Perphenazine interaction
Anacaulase-bcdbNexoBrid
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Anacaulase-bcdb interaction
AnagrelideAgrylin
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Anagrelide interaction Anagrelide drug page: uses, dosage & side effects
AnisindioneMiradon
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Anisindione interaction
Antithrombin IiiThrombate III
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Antithrombin Iii interaction
ApixabanEliquis
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Apixaban interaction Apixaban drug page: uses, dosage & side effects
ArgatrobanArgatroban
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Argatroban interaction
AspirinAngettes 75, ASA, Asaphen, Aspirin, Caprin, Cartia +8 more
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin interaction Aspirin drug page: uses, dosage & side effects
Aspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium HydroxideAscriptin Codeine #3
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Aluminum Hydroxide, Codeine Phosphate, Magnesium Hydroxide interaction
Aspirin, ButalbitalAxotal
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Butalbital interaction
Aspirin, Butalbital, CaffeineFiorinal
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Butalbital, Caffeine interaction Aspirin, Butalbital, Caffeine drug page: uses, dosage & side effects
Aspirin, Butalbital, Caffeine, Codeine PhosphateFiorinal w/ Codeine
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Butalbital, Caffeine, Codeine Phosphate interaction
Aspirin, Butalbital, Caffeine, PhenacetinMarnal
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Butalbital, Caffeine, Phenacetin interaction
Aspirin, CaffeineAnacin
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Caffeine interaction
Aspirin, Caffeine, Codeine PhosphateAnacin w/ Codeine
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Caffeine, Codeine Phosphate interaction
Aspirin, Caffeine, Dihydrocodeine BitartrateSynalgos DC
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Caffeine, Dihydrocodeine Bitartrate interaction
Aspirin, Caffeine, Dover's PwdAcedoval, Dovacet
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Caffeine, Dover's Pwd interaction
Aspirin, Caffeine, HydrocodoneDamason-P
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Caffeine, Hydrocodone interaction
Aspirin, Caffeine, Isobutylallylbarbituric Acid, PhenacetinLanorinal
Moderate Anticoagulant/antiplatelet Drugs

Theoretically, black currant seed oil might increase the risk of bleeding if used in combination with anticoagulant or antiplatelet drugs.

Read the full Black Currant + Aspirin, Caffeine, Isobutylallylbarbituric Acid, Phenacetin interaction Aspirin, Caffeine, Isobutylallylbarbituric Acid, Phenacetin drug page: uses, dosage & side effects
Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each drug listed above links to the full report for that exact Black Currant combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
The big picture

The kinds of drugs Black Currant affects

Every type of medication (drug category) Black Currant is known to interact with. Open any category for the detail — or search your exact drug in the checker above.

All 2 drug categories Black Currant interacts with
Anticoagulant/antiplatelet DrugsPhenothiazines
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
Monograph

Black Currant: Uses, Safety & Side Effects

Medically reviewed by · Reviewed July 2026 ·
The bottom line

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 supplement, solid human evidence for most health claims is still limited. Talk with your pharmacist or doctor before using concentrated supplements, especially if you are pregnant, nursing, or have a medical condition.

Black Currant
Scientific name
Ribes nigrum
Family
Grossulariaceae
Part used
Berries (fruit), seeds (seed oil), and leaves
Common forms
Whole berries, juice, capsules, seed oil softgels, dried leaf for tea, extracts
People commonly use it for
  • Dry eyes and eye strain
  • Joint pain and inflammation
  • Immune and general wellness support
  • Cardiovascular health
  • Skin conditions (such as dry skin or eczema)

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance
OverallUse caution

The berry is safe as a food, but concentrated supplements are less studied and should be used carefully.

PregnancyInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full pregnancy detail
BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Jump to a section

Overview

Black currant (Ribes nigrum) is a small shrub native to Europe and parts of northern Asia. It produces dark purple, sweet-tart berries that are popular in jams, juices, syrups, and as a flavoring agent (often called "cassis").

The berries are a good source of vitamin C, fiber, and colorful plant pigments called anthocyanins. Besides the fruit, the seeds are pressed into an oil that is rich in gamma-linolenic acid (GLA), an omega-6 fatty acid. The leaves are also used traditionally to make teas and extracts.

People take black currant in many forms, including fresh or dried berries, juice, capsules, leaf tea, and seed oil softgels.

How it works

Black currant contains several compounds that may explain its proposed effects. These mechanisms are mostly based on laboratory and animal research, and they do not always translate into real benefits in people.

The main active compounds include:

  • Anthocyanins: The dark purple pigments that act as antioxidants and may help protect cells and support blood vessels.
  • Vitamin C: An antioxidant that supports normal immune function and skin health.
  • Gamma-linolenic acid (GLA): An omega-6 fatty acid found in the seed oil that the body can convert into substances involved in controlling inflammation.

Researchers believe these compounds may reduce oxidative stress and influence inflammation, but more human studies are needed to confirm how meaningful these effects are.

Effectiveness

Does Black Currant work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by .

Evidence overview · 28 uses evaluated
28 Insufficient evidence
How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.
2Likely EffectiveGood evidence, though not yet conclusive.
3Possibly EffectiveSome evidence suggests a benefit.
4Possibly IneffectiveSome evidence it may not help.
5Likely IneffectiveFairly strong evidence it doesn’t help.
6IneffectiveStrong evidence it doesn’t work.
7Insufficient Reliable Evidence to RateToo little research to say either way.

For Black Currant, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 28 conditions — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Alzheimer disease
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant berry for Alzheimer disease, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Atopic dermatitis (eczema)
Rating & evidence shown verbatim from Natural Medicines

Topical black currant seed oil has only been evaluated in combination with other ingredients; its effect when used alone is unclear.

Insufficient Reliable Evidence To Rate Colic
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant leaf for colic, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Common cold
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant berry for common cold, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Cough
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant leaf for cough, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Diarrhea
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant leaf for diarrhea, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Dry eye
Rating & evidence shown verbatim from Natural Medicines

Oral black currant has only been evaluated in combination with other ingredients; its effect when used alone is unclear.

Insufficient Reliable Evidence To Rate Dysmenorrhea
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant seed oil for dysmenorrhea, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Glaucoma
Rating & evidence shown verbatim from Natural Medicines

It is unclear if oral black currant is beneficial in patients with glaucoma.

Insufficient Reliable Evidence To Rate Gout
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant leaf for gout, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Hyperlipidemia
Rating & evidence shown verbatim from Natural Medicines

It is unclear if oral black currant seed oil is beneficial in patients with hyperlipidemia.

Insufficient Reliable Evidence To Rate Hypertension
Rating & evidence shown verbatim from Natural Medicines

It is unclear if oral black currant seed oil is beneficial in patients with hypertension.

Insufficient Reliable Evidence To Rate Influenza
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant berry for influenza, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Insect bite
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using topical black currant leaf for insect bite, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Japanese cedar pollinosis
Rating & evidence shown verbatim from Natural Medicines

It is unclear if oral black currant extract is beneficial in patients with Japanese cedar pollinosis.

Insufficient Reliable Evidence To Rate Liver disease
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant leaf for liver disease, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Menopausal symptoms
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant seed oil for menopausal symptoms, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Muscle fatigue
Rating & evidence shown verbatim from Natural Medicines

It is unclear if oral black currant juice extract is beneficial in patients with muscle fatigue.

Insufficient Reliable Evidence To Rate Osteoarthritis
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant leaf for osteoarthritis, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Peripheral arterial disease (PAD)
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant juice for PAD, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Premenstrual syndrome (PMS)
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant seed oil for PMS, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Rheumatoid arthritis (RA)
Rating & evidence shown verbatim from Natural Medicines

It is unclear if oral black currant seed oil is beneficial in patients with RA.

Insufficient Reliable Evidence To Rate Rhinosinusitis
Rating & evidence shown verbatim from Natural Medicines

Oral black currant has only been evaluated in combination with other ingredients; its effect when used alone is unclear.

Insufficient Reliable Evidence To Rate Seizures
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant leaf for seizures, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Upper respiratory tract infection (URTI)
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant berry for URTIs, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Urinary tract infections (UTIs)
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant leaf for UTIs, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Venous insufficiency
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral black currant for venous insufficiency, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Insufficient Reliable Evidence To Rate Wound healing
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using topical black currant leaf for wound healing, there is insufficient reliable information about the clinical effects of black currant for this purpose.

Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.

Safety & precautions

Black currant berries are widely eaten as food and are generally considered safe in normal food amounts. Concentrated supplements, such as seed oil capsules and leaf extracts, are less well studied, so it is wise to use caution.

People who should be especially careful include:

  • Those with bleeding disorders or who are scheduled for surgery, since some plant oils may affect bleeding.
  • People with low blood pressure, as some sources suggest a mild blood-pressure-lowering effect.
  • Anyone with a known allergy to currants or related plants.

For pregnancy and breastfeeding, eating the berry as part of a normal diet is likely fine, but there is not enough reliable safety information on concentrated supplements. Because of this, it is best to avoid supplement forms unless your doctor approves them.

Always tell your pharmacist or doctor about any supplements you are taking, especially if you have a health condition or take prescription medicines.

Side effects

Black currant is usually well tolerated, especially when eaten as food. When side effects occur, they tend to be mild.

Possible side effects include:

  • Upset stomach, gas, or diarrhea, particularly with the seed oil.
  • Mild gas or bloating.
  • Allergic reactions in people sensitive to the plant (rare).

Serious side effects are uncommon. If you notice signs of an allergic reaction such as rash, swelling, or trouble breathing, stop using it and seek medical care right away.

Black Currant: Reported Adverse Effects

Documented safety reports on Black Currant from the evidence-graded Natural Medicines (TRC Healthcare) database, shown word-for-word from the licensed record.

Reports by condition
Diarrhea Gastrointestinal

Of 2154 patients with hyperlipidemia taking black currant seed oil 1.8 grams twice daily for 6 weeks, 8 reports of mild diarrhea were considered related to the supplement. These adverse reactions were reported 2-10 days after beginning treatment with black currant seed oil.

  1. 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.
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

Adverse-effects data: Natural Medicines, Therapeutic Research Center

Dosing

There is no official standardized dose for black currant supplements. The right amount can vary depending on the form (berry, juice, seed oil, or leaf) and the product's strength.

Because doses are not well established, the safest approach is to follow the directions on the product label and not exceed them. The whole berry can be enjoyed freely as part of a normal diet.

If you are considering black currant seed oil or leaf extracts for a specific health reason, check with your pharmacist or doctor first so they can help you choose a reasonable amount and confirm it is appropriate for you.

Pregnancy & Breastfeeding

Black Currant & Pregnancy

Insufficient reliable information

Insufficient reliable information available; avoid using.

Black Currant & Breastfeeding

Insufficient reliable information

Insufficient reliable information available; avoid using.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.

© 2026 Therapeutic Research Center

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

References & further reading

The 6 references that drive our Black Currant monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  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
Keep reading

This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.

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

Brand directory

Brands that make products with Black Currant

372 brands in our database make a supplement containing Black Currant.

Product directory

Supplement products with Black Currant

1,710 products in our database contain Black Currant. Open any to see its full ingredient list and every drug interaction we check.

#Shatter SX-7 Black Onyx Ripped Cherry Limeade Twist by MuscleTech Powder 16.79 oz. · 476 Gram(s) View ingredients & interactions 1,000 mg Vitamin C Acai Berry by Emergen-C Powder 0.3 OZ/Packet · 9.2 G/Packet · 30 Packet(s) View ingredients & interactions 37 Strawberries by Purity Products Capsule 30 Capsule(s) View ingredients & interactions 50 Plus by GNC Women's Ultra Mega Other (e.g. Tea Bag) 120 Caplet(s) View ingredients & interactions 50 Plus by GNC Mega Men Other (e.g. Tea Bag) 120 Caplet(s) View ingredients & interactions 50 Plus by GNC Women's Ultra Mega Other (e.g. Tea Bag) 60 Caplet(s) View ingredients & interactions Acerola C-500 500 mg Berry Flavor by Radiance Other (e.g. Tea Bag) 60 Chewable Wafer(s) View ingredients & interactions Acerola C-500 Natural Berry Flavor by Nutrition Warehouse Other (e.g. Tea Bag) 60 Chewable Wafer(s) View ingredients & interactions Acerola-Raspberry Chewable Vitamin C 300 mg by Newflower Farmers Markets Tablet Or Pill 90 Tablet(s) View ingredients & interactions Adrenotonic by Herbs, Etc. Softgel Capsule 60 Fast-Acting Softgel(s) View ingredients & interactions Adrenotonic by Herbs Etc. Liquid 1 fl. Oz. · 29.6 mL View ingredients & interactions Adrenotonic by Herbs Etc. Softgel Capsule 60 Softgel(s) View ingredients & interactions Adrenotonic by Herbs Etc. Softgel Capsule 60 Softgel(s) View ingredients & interactions Adrenotonic by Herbs Etc. Liquid 1 Fluid Ounce(s) · 30 Milliliter(s) View ingredients & interactions Adult Daily by Oweli Capsule 60 Veggie Capsule(s) View ingredients & interactions Adult Fiber Gummies with Vitamin D by Puritan's Pride Gummy Or Jelly 75 Gummie(s) View ingredients & interactions Adult Multivitamin by Dr Tobias Tablet Or Pill 90 Tablet(s) View ingredients & interactions Adult Multivitamin by Dr. Tobias Tablet Or Pill 90 Tablet(s) View ingredients & interactions Adult's Chewable Delicious Apple Cinnamon by NaturesPlus Source of Life Other (e.g. Tea Bag) 90 Wafer(s) View ingredients & interactions Adult's Chewable Delicious Apple Cinnamon Flavor by Natures Plus Source of Life Other (e.g. Tea Bag) 90 Wafer(s) View ingredients & interactions Adult's Chewable Multi-Vitamin & Mineral Exotic Red Berry Flavor by NaturesPlus Tablet Or Pill 60 Tablet(s) View ingredients & interactions Adults' Calcium Gummies 500 mg by up&up Gummy Or Jelly 100 Gummy Vitamin(s) View ingredients & interactions Advanced Body Boost Collagen by Body Kitchen Capsule 90 Capsule(s) View ingredients & interactions Advanced Body Boost Collagen Unflavored Powder by Body Kitchen Powder 10 Ounce(s) · 284 Gram(s) View ingredients & interactions
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Black Currant: Common Questions

What is Black Currant used for, and does it work?
People use Black Currant for a range of reasons, but according to the Natural Medicines database the current clinical evidence is insufficient to confirm it works for the specific conditions it has been studied for. See the graded list on this page, and talk to your pharmacist or doctor before relying on it for any condition.
Does Black Currant interact with prescription medications?
Yes. We list 140 medications with a known interaction with Black Currant. Use the checker above to see how Black Currant interacts with a specific drug.
How are Black Currant interactions rated?
Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.
Is it safe to take Black Currant with my medications?
It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.
Where does this Black Currant interaction information come from?
Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.
What is Black Currant used for?
People use it for eye health, joint and inflammation support, heart health, skin conditions, and general wellness. However, strong human evidence is limited for most of these uses, so it should not replace proven treatments.
Is Black Currant safe to take?
The berry is generally safe as a food. Concentrated supplements like seed oil and leaf extracts are less studied, so use them cautiously and check with your pharmacist or doctor, especially if you have a medical condition.
Can I take Black Currant while pregnant or breastfeeding?
Eating the berry in normal food amounts is likely okay, but there is not enough safety information on supplements. It is best to avoid concentrated Black Currant products during pregnancy and breastfeeding unless your doctor approves.
What is Black Currant seed oil and what makes it different?
Black Currant seed oil is pressed from the seeds and is rich in gamma-linolenic acid (GLA), an omega-6 fatty acid. It is taken mainly for inflammation and skin health, though the supporting evidence is limited.

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

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Products that contain Black Currant

A rotating sample of real supplements in our database that list Black Currant — open any to see its full ingredients and every drug interaction we check.

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