Cranberry Ingredients & Drug Interactions
by Herbal Terra
What is this page for?
First and foremost: checking Cranberry 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
Cranberry is a dietary supplement by Herbal Terra with 1 active ingredient. Its ingredients are commonly taken for urinary tract infection prevention, bladder health, antioxidant support.Based on those ingredients, 712 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Cranberry Berry Extract, Dry. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.
Check Your Meds Against Cranberry by Herbal Terra
Ask about any prescription or over-the-counter medication and we check it for interactions with Cranberry 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 Cranberry 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: Cranberry Berry Extract, Dry. Cranberry is traditionally used to support urinary tract health.
The liquid also includes alcohol, water, and glycerin as inactive ingredients to deliver the extract.
Does it work?
Moderate evidence
The evidence supports cranberry as possibly effective for preventing or managing urinary tract infections (UTIs). For other conditions listed on the label—age-related memory loss, benign prostate enlargement, cancer risk, fatty liver disease, and chronic fatigue—the evidence we hold is insufficient to rate whether cranberry works.
If you're taking this for UTI prevention or treatment, it may help; for other uses, talk with your doctor about whether the data supports it for your situation.
How safe is it?
Well-documented data
Cranberry is generally well tolerated when taken by mouth, though concentrated supplement doses haven't been thoroughly studied. The most common side effects are diarrhea and gastrointestinal discomfort.
Very large amounts—3 to 4 liters of juice daily—can cause stomach upset, and some people report nausea or skin irritation. This supplement is not a substitute for medical treatment of infections.
Because concentrated extracts like this one are less well-studied than whole-food cranberry, check with your provider before starting, especially if you have stomach sensitivity.
Meds to double-check
Moderate interaction found
Before taking this cranberry extract, check if you use statins like atorvastatin (Lipitor), blood thinners like warfarin (Coumadin), or blood pressure drugs like nifedipine (Procardia)—all carry moderate interaction risk. Also flag pain relievers and other drugs your liver metabolizes, though the evidence is less clear.
Use the medication checker on this page to be sure.
The bottom line
Scorecard at a glanceFully disclosed formula with some supporting evidence for its stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.
Cranberry extract may help prevent UTIs and is generally well tolerated, but it can interact significantly with statins, blood thinners, and some blood pressure medications. If you take prescription drugs—especially cholesterol or blood-thinning medications—verify your medications using the checker below before you start.
Talk with your pharmacist if you have stomach sensitivity or are pregnant or nursing.
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 Jan 23, 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 Cranberry, straight from the product label.
| Brand | Herbal Terra |
|---|---|
| Barcode (UPC) | 7386005011900 |
| Net contents | 2 Fluid Ounce(s); 60 mL |
| Market status | On market |
| Date entered into DSLD | Jan 23, 2025 |
| DSLD ID | 324966 |
| 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 Cranberry by Herbal Terra, sourced from the NIH Dietary Supplement Label Database.
Supplement Facts
| Ingredient | Amount | % DV |
|---|---|---|
| Cranberry Berry 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
Vaccinium macrocarpon
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.
Cranberry 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 Cranberry 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.
Cranberry Berry Extract, Dry
Interacts with712 drugs
Cranberry is best known for helping to prevent repeated urinary tract infections (UTIs) in some people, and the evidence here is moderate but mixed. I...
Cranberry Berry Extract, Dry monograph & interactionsOther (inactive) ingredients: Alcohol, Water, Glycerin. These complete the product’s ingredient list but are not active constituents.
Cranberry by Herbal Terra Drug Interactions
HelloPharmacist Interaction Report
Herbal Terra Cranberry is a single-ingredient liquid extract that does interact with several medication types.
The most serious concern is with cholesterol-lowering drugs called statins, particularly atorvastatin (Lipitor). A documented case shows a patient taking atorvastatin who drank 16 ounces of cranberry juice daily for 2 weeks developed upper back pain, muscle breakdown (rhabdomyolysis), and abnormal liver function—effects that reversed when stopped.
Cranberry theoretically blocks an enzyme (CYP3A4) that breaks down these drugs.
Read the full breakdown — every affected drug type, severity by severity
Other moderate-severity interactions include blood thinners like warfarin (Coumadin) and the blood pressure drug nifedipine (Procardia). With warfarin, case reports link cranberry juice to increased bleeding risk, though the evidence is mixed.
Animal studies suggest nifedipine levels could rise by up to 60 percent when cranberry is taken beforehand. Minor interactions are theoretically possible with pain relievers like diclofenac (Voltaren) and other CYP3A4 or CYP2C9 substrates, though human evidence is conflicting or limited.
Altogether, these interactions span 702 individual medications. If you take any prescription drug—especially a statin, blood thinner, or blood pressure medication—check your exact medications with the search tool on this page before starting cranberry.
Check your own medications below · Editorial policy · How we use AI
Want to check YOUR meds against Cranberry?
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 Cranberry interact with 712 drugs. Click any drug to see the details.
1 of the 1 ingredient in Cranberry interact with drugs. Each result below shows which ingredient is responsible. Cranberry Berry Extract, Dry
ApremilastOtezla
How Apremilast interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Apremilast interactionAprepitantCinvanti, Emend
How Aprepitant interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aprepitant interactionAripiprazoleAbilify, Abilify Maintena, Abilify Mycite
How Aripiprazole interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aripiprazole interactionAripiprazole LauroxilAristada, Aristada Initio Kit
How Aripiprazole Lauroxil interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aripiprazole Lauroxil interactionArmodafinilNuvigil
How Armodafinil interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Armodafinil interactionAspirin, Butalbital, CaffeineFiorinal
How Aspirin, Butalbital, Caffeine interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Butalbital, Caffeine interactionAspirin, Butalbital, Caffeine, Codeine PhosphateFiorinal w/ Codeine
How Aspirin, Butalbital, Caffeine, Codeine Phosphate interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Butalbital, Caffeine, Codeine Phosphate interactionAspirin, Butalbital, Caffeine, PhenacetinMarnal
How Aspirin, Butalbital, Caffeine, Phenacetin interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Butalbital, Caffeine, Phenacetin interactionAspirin, CaffeineAnacin
How Aspirin, Caffeine interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Caffeine interactionAspirin, Caffeine, Codeine PhosphateAnacin w/ Codeine
How Aspirin, Caffeine, Codeine Phosphate interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Caffeine, Codeine Phosphate interactionAspirin, Caffeine, Dihydrocodeine BitartrateSynalgos DC
How Aspirin, Caffeine, Dihydrocodeine Bitartrate interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Caffeine, Dihydrocodeine Bitartrate interactionAspirin, Caffeine, Dover's PwdAcedoval, Dovacet
How Aspirin, Caffeine, Dover's Pwd interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Caffeine, Dover's Pwd interactionAspirin, Caffeine, HydrocodoneDamason-P
How Aspirin, Caffeine, Hydrocodone interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Caffeine, Hydrocodone interactionAspirin, Caffeine, Isobutylallylbarbituric Acid, PhenacetinLanorinal
How Aspirin, Caffeine, Isobutylallylbarbituric Acid, Phenacetin interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Caffeine, Isobutylallylbarbituric Acid, Phenacetin interactionAspirin, Caffeine, OrphenadrineInvagesic, Invagesic Forte, Norgesic, Norgesic Forte, Orphengesic, Orphengesic Forte
How Aspirin, Caffeine, Orphenadrine interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Caffeine, Orphenadrine interactionAspirin, Caffeine, Phenacetin, PropoxypheneMargesic Comp. 65
How Aspirin, Caffeine, Phenacetin, Propoxyphene interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Caffeine, Phenacetin, Propoxyphene interactionAspirin, Chlorpheniramine, PhenylpropanolamineAlka-Seltzer Plus Cold
How Aspirin, Chlorpheniramine, Phenylpropanolamine interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Chlorpheniramine, Phenylpropanolamine interactionAspirin, HydrocodoneAlor 5 500, Lortab ASA
How Aspirin, Hydrocodone interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Hydrocodone interactionAspirin, OmeprazoleYosprala
How Aspirin, Omeprazole interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 2c9 (cyp2c9) Substrates, Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP2C9 substrates.
Read the full Cranberry Berry Extract, Dry + Aspirin, Omeprazole interactionAtazanavirReyataz
How Atazanavir interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Atazanavir interactionAtazanavir, CobicistatEvotaz
How Atazanavir, Cobicistat interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Atazanavir, Cobicistat interactionAtogepantQulipta
How Atogepant interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Atogepant interactionAtorvastatinAtorvaliq
How Atorvastatin interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryAtorvastatin (lipitor), Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase levels and adverse effects of atorvastatin.
Read the full Cranberry Berry Extract, Dry + Atorvastatin interactionAtorvastatin CalciumLipitor
How Atorvastatin Calcium interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryAtorvastatin (lipitor), Cytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase levels and adverse effects of atorvastatin.
Read the full Cranberry Berry Extract, Dry + Atorvastatin Calcium interactionAtropine, Chlorpheniramine, Hyoscyamine, Phenylephrine, Phenylpropanolamine, ScopolamineAtrohist Plus, Pro Tuss, Ru-tuss, Stahist
How Atropine, Chlorpheniramine, Hyoscyamine, Phenylephrine, Phenylpropanolamine, Scopolamine interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Atropine, Chlorpheniramine, Hyoscyamine, Phenylephrine, Phenylpropanolamine, Scopolamine interactionAvacopanTavneos
How Avacopan interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Avacopan interactionAvanafilStendra
How Avanafil interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Avanafil interactionAvapritinibAyvakit
How Avapritinib interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Avapritinib interactionAxitinibInlyta
How Axitinib interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Axitinib interactionAzelastine Hydrochloride, Fluticasone PropionateDymista
How Azelastine Hydrochloride, Fluticasone Propionate interacts with Cranberry — through 1 ingredient. Tap an ingredient for the detail:
Cranberry Berry Extract, DryCytochrome P450 3a4 (cyp3a4) Substrates Moderate
Interaction Summary
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
Read the full Cranberry Berry Extract, Dry + Azelastine Hydrochloride, Fluticasone Propionate interactionEach ingredient & the kinds of drugs it affects
For each ingredient in Cranberry 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.
Cranberry Berry Extract, Dry
Atorvastatin (Lipitor)
Theoretically, cranberry might increase levels and adverse effects of atorvastatin.
In one case report, a patient taking atorvastatin experienced upper back pain, rhabdomyolysis, and abnormal liver function after drinking cranberry juice 16 ounces daily for 2 weeks. Theoretically, this may have been caused by inhibition of cytochrome P450 3A4 (CYP3A4) enzymes by cranberry juice, as atorvastatin is a CYP3A4 substrate. Creatinine kinase and liver enzymes normalized within 2 weeks of stopping cranberry juice. Patients taking atorvastatin should avoid large quantities of cranberry juice.
Cytochrome P450 3A4 (Cyp3A4) Substrates
Theoretically, cranberry might increase the levels and adverse effects of CYP3A4 substrates.
A case of upper back pain, rhabdomyolysis, and abnormal liver function has been reported for a patient taking atorvastatin, a CYP3A4 substrate, in combination with cranberry juice 16 ounces daily for 2 weeks. Creatinine kinase and liver enzymes normalized within 2 weeks of stopping cranberry juice. Also, animal research suggests that cranberry juice, administered intraduodenally 30 minutes prior to nifedipine, a CYP3A4 substrate, inhibits nifedipine metabolism and increases the area under the concentration-time curve by 1.6-fold compared to control.
Nifedipine (Procardia)
Theoretically, cranberry might increase the levels and adverse effects of nifedipine.
Animal research suggests that cranberry juice, administered intraduodenally 30 minutes prior to nifedipine treatment, inhibits nifedipine metabolism and increases the area under the concentration-time curve by 1.6-fold compared to control. This interaction has not been reported in humans.
Warfarin (Coumadin)
Theoretically, cranberry might increase the levels and adverse effects of warfarin. However, research is conflicting.
There is contradictory evidence about the effect of cranberry juice on warfarin. Case reports have linked cranberry juice consumption to increases in the international normalized ratio (INR) in patients taking warfarin, resulting in severe spontaneous bleeding and excessive postoperative bleeding. Daily consumption of cranberry sauce for one week has also been linked to an increase in INR in one case report. In a small study in healthy young males, taking a high dose of 3 grams of cranberry juice concentrate capsules, equivalent to 57 grams of fruit daily, for 2 weeks produced a 30% increase in the area under the INR-time curve after a single 25-mg dose of warfarin. However, 3 very small clinical studies in patients stabilized on warfarin reported that cranberry juice 250 mL once or twice daily for 7 days (27% cranberry juice or pure cranberry juice) or 240 mL once daily for 14 days does not significantly increase INR or affect plasma warfarin levels. The reasons for these discrepant findings are unclear. It is possible that the form and dose of cranberry may play a role, as cranberry extracts and juices contain different constituents. Additionally, an in vitro study evaluating 5 different cranberry juices found varying effects, with only a cranberry concentrate, and not diluted cranberry juices, inhibiting CYP2C9. However, this concentrate did not inhibit CYP2C9 activity in humans.
Cytochrome P450 2C9 (Cyp2C9) Substrates
Theoretically, cranberry might increase the levels and adverse effects of CYP2C9 substrates. However, research is conflicting.
There is contradictory evidence about the effect of cranberry on CYP2C9 enzymes. In vitro evidence suggests that flavonoids in cranberry inhibit CYP2C9 enzymes. However, clinical research shows that cranberry juice does not significantly affect the levels, metabolism, or elimination of the CYP2C9 substrates flurbiprofen or diclofenac. Also, in patients stabilized on warfarin, drinking cranberry juice 250 mL daily for 7 days does not significantly increase the anticoagulant activity of warfarin, a CYP2C9 substrate. Additional pharmacokinetic research shows that cranberry juice does not increase peak plasma concentrations or area under the concentration-time curve of warfarin.
Diclofenac (Voltaren, Others)
Theoretically, cranberry might modestly increase the levels and adverse effects of diclofenac.
In vitro evidence suggests that cranberry juice inhibits diclofenac metabolism by human liver microsomes. However, drinking cranberry juice does not seem to affect diclofenac metabolism in humans.
Brand information
Manufacturer and brand details for Cranberry, from the product label.
Herbal Terra
See all Herbal Terra products- Name
- Herbal Terra LLC
- Phone Number
- +18083857868
- Web Address
- herbalterra.com
Cranberry by Herbal Terra: Common Questions
Does Cranberry by Herbal Terra interact with any medications?
How can one product interact with so many drugs?
Where does this information come from?
Will cranberry extract help treat a urinary tract infection?
What are the most common side effects?
Is it safe to take while pregnant or breastfeeding?
Why does the label mention so many conditions cranberry might help with?
Does this liquid contain any fillers or additives?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
Not sure if Cranberry 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 Cranberry’s Ingredients
Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.
Sources & How We Checked
Cranberry'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 33 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.
Cranberry 33 references
- Anon. Possible interaction between warfarin and cranberry juice. Current Problems in Pharmacovigilance 2003;29:8. PubMed
- Greenblatt DJ, von Moltke LL, Perloff ES, et al. Interaction of flurbiprofen with cranberry juice, grape juice, tea, and fluconazole: in vitro and clinical studies. Clin Pharmacol Ther 2006;79:125-33. PubMed
- Hodek P, Trefil P, Stiborova M. Flavonoids-potent and versatile biologically active compounds interacting with cytochromes P450. Chem Biol Interact 2002;139:1-21.. PubMed
- Grant P. Warfarin and cranberry juice: An interaction? J Heart Valve Dis 2004;13:25-6.
- Suvarna R, Pirmohamed M, Henderson L. Possible interaction between warfarin and cranberry juice. BMJ 2003;327:1454. PubMed
- Li Z, Seeram NP, Carpenter CL, et al. Cranberry does not affect prothrombin time in male subjects on warfarin. J Am Diet Assoc 2006;106:2057-61. PubMed
- Lilja JJ, Backman JT, Neuvonen PJ. Effects of daily ingestion of cranberry juice on the pharmacokinetics of warfarin, tizanidine, and midazolam - probes of CYP2C9, CYP1A2 and CYP3A4. Clin Pharmacol The 2007:81:833-9. PubMed
- Wing DA, Rumney PJ, Preslicka CW, Chung JH. Daily cranberry juice for the prevention of asymptomatic bacteriuria in pregnancy: a randomized, controlled pilot study. J Urol 2008;180:1367-72. PubMed
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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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