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Dietary supplement

Hawthorn Berry 540 mg Ingredients & Drug Interactions

by NOW

Hawthorn Berry 540 mg label
See full label image
Capsule Category: Botanical
Most serious interaction: Major
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Hawthorn Berry 540 mg 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: Major

Hawthorn Berry 540 mg is a dietary supplement by NOW with 1 active ingredient. Its ingredients are commonly taken for heart failure symptoms, high blood pressure, chest pain (angina).Based on those ingredients, 191 medications have a known interaction with it, the most serious rated major. The ingredients most likely to interact are Hawthorn. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Hawthorn Berry 540 mg by NOW

Ask about any prescription or over-the-counter medication and we check it for interactions with Hawthorn Berry 540 mg by NOW — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Hawthorn Berry 540 mg by NOW

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 11, 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 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product contains one active ingredient: hawthorn berry at 540 mg per capsule. Hawthorn has been used traditionally to support heart health and circulation.

The capsule also contains two inactive ingredients—hypromellose and stearic acid—which are standard binders and capsule materials.

Does it work?

Not established
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 established

The graded evidence we hold for these ingredients covers different conditions than the ones this product is marketed for, so there's no established rating for its stated use — see Hawthorn's own graded uses on its monograph.

Why this rating?
  • The label markets this product for: herbal tonic for heart and cardiovascular health.
  • We looked for evidence on: Angina, Arrhythmia, Cardiovascular disease (CVD), Congestive heart failure (CHF), Hypertension, Cardiac function — and 1 related terms.
  • The closest evidence on file: Hawthorn is rated "Insufficient Reliable Evidence To Rate" for Angina (Natural Medicines).
  • Also on file: Hawthorn is rated "Insufficient Reliable Evidence To Rate" for Arrhythmia, Cardiovascular disease (CVD), Congestive heart failure (CHF), Hypertension.

The evidence we hold for hawthorn doesn't establish reliable effectiveness for any of its traditional uses. Angina, anxiety, irregular heartbeat, atherosclerosis, cardiovascular disease, and cognitive function all carry a rating of insufficient reliable evidence.

That doesn't mean hawthorn doesn't work; it means the clinical data available aren't strong enough yet to say one way or the other.

The evidence, ingredient by ingredient Hawthorn

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.

Hawthorn is generally well tolerated when used as directed, though anyone with a heart condition needs to take it under medical supervision. Serious adverse effects are rare, but multiorgan reactions leading to kidney problems have been reported in isolated cases.

Mild effects like palpitations or irregular heartbeat have been noted in small numbers of trial participants with heart failure. There isn't enough safety information to recommend hawthorn during pregnancy or while breastfeeding—talk with your doctor or pharmacist if you're in either situation.

Side effects, ingredient by ingredient Hawthorn

Meds to double-check

Major interaction found
Known Interaction Concern · database check
Major identified

At least one ingredient has a documented Major-severity interaction. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Hawthorn.
  • The most serious interaction on file is rated Major.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; heart-rhythm medications.
  • For scale: 191 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 this product, double-check with your pharmacist if you're on nitrates or phosphodiesterase-5 inhibitors (like sildenafil)—these carry Major-severity interaction risks. Also review any beta-blockers, blood thinners, calcium channel blockers, or digoxin you may be taking.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no established evidence rating for its marketed use. Major medication interactions have been identified, and safety information is well characterized.

Hawthorn might appeal to someone interested in traditional heart-health support, but if you take any medication for blood pressure, heart rhythm, circulation, or clotting, you need to check with your pharmacist first. The interactions are real and potentially serious.

Anyone with an existing heart condition should use it only under medical guidance.

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 Sep 25, 2024.

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 Hawthorn Berry 540 mg, straight from the product label.

Brand NOW
Barcode (UPC) 733739047151
Net contents 100 Veg Capsule(s)
Market status On market
Date entered into DSLD Sep 25, 2024
DSLD ID 314382
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Kosher, Gluten Free, Dairy Free
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 Hawthorn Berry 540 mg by NOW, 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:
2 Veg Capsule(s)
Maximum serving Sizes:
2 Veg Capsule(s)
Servings per container
50
UPC/BARCODE
733739047151
IngredientAmount% DV
Total Carbohydrates1 Gram(s)1%
Hawthorn1.08 Gram(s)--

Other ingredients: Hypromellose, Stearic Acid

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 Usage:Take 2 capsules 3 times daily with food.

Formula

Hawthorn Berries have a long history of traditional use in Europe and North America as an herbal tonic. Modern scientific studies have identified a number of bioactive constituents, including OPCs (Oligomeric Procyanidins). Many of these compounds have been found to possess powerful free radical scavenging activity.

Triangle K (Kosher)

FDA Disclaimer Statement

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

Precautions

Caution: For adults only. Keep out of reach of children.

Consult physician if pregnant/nursing, taking medication (especially cardiac and blood pressure medications), or have a medical condition (especially a heart a heart or blood pressure condition).

Not manufactured with yeast, wheat, gluten, soy, corn, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

Formulation

Herbal supplement Free radical scavenger

Non-GMO

Vegetarian/vegan

Made in Canada with globally sourced ingredients. Natural color variation may occur in this product.

Not manufactured with yeast, wheat, gluten, soy, corn, milk, egg, fish, shellfish or tree nut ingredients.

FDA Statement of Identity

A Dietary Supplement

Seals/Symbols

Triangle K (Kosher)

GMP Quality Assured

General Statements

Botanicals/herbs Family owned since 1968.

Storage

Store in a cool, dry place after opening.

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

See for yourself

Hawthorn Berry 540 mg by NOW label

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

Hawthorn Berry 540 mg 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 Hawthorn Berry 540 mg by NOW

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size2 Veg Capsule(s) Dosage formCapsule Servings per container50 Amounts shown are per serving.

Hawthorn

Interacts with
191 drugs
1.08 Gram(s) per serving

Hawthorn is a plant traditionally used for heart-related complaints, and some studies suggest it may modestly help symptoms of mild heart failure when...

Hawthorn monograph & interactions

Other (inactive) ingredients: Hypromellose, Stearic Acid. These complete the product’s ingredient list but are not active constituents.

Interaction report

Hawthorn Berry 540 mg by NOW Drug Interactions

Want to check YOUR meds against Hawthorn Berry 540 mg?

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
191Drugs
14 Major 177 Moderate

Ingredients driving the most interactions

Hawthorn 191

Individual Drug Interactions

The ingredients in Hawthorn Berry 540 mg interact with 191 drugs. Click any drug to see the details.

1 of the 1 ingredient in Hawthorn Berry 540 mg interact with drugs. Each result below shows which ingredient is responsible. Hawthorn

Each ingredient & the kinds of drugs it affects

For each ingredient in Hawthorn Berry 540 mg 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.

Hawthorn6 drug types · 191 drugs

Nitrates

Theoretically, concomitant use might cause additive coronary vasodilatory effects.
Some evidence shows that hawthorn might lower blood pressure due to vasodilatory effects.

Likelihood Probable Evidence D
Phosphodiesterase-5 Inhibitors

Theoretically, concomitant use might result in additive vasodilation and hypotension.
Hawthorn might inhibit PDE-5 and cause vasodilation.

Likelihood Probable Evidence D
Anticoagulant/Antiplatelet Drugs

Theoretically, hawthorn may increase the risk of bleeding if used with anticoagulant or antiplatelet drugs.
In vitro and animal research shows that hawthorn can inhibit platelet aggregation. However, its effect in humans is unclear. One observational study shows that patients taking hawthorn shortly before undergoing coronary artery bypass graft (CABG) surgery or valve replacement surgery have a 10% incidence of postoperative bleeding, compared with 1% in those who never consumed hawthorn extract. However, clinical research shows that taking a specific preparation of dried hawthorn leaves and flowers (Crataesor, Soria Natural Lab) 800 mg three times daily for 15 days does not affect platelet aggregation or levels of thromboxane B2, the metabolite of thromboxane A2, in healthy humans.

Likelihood Possible Evidence D
Beta-Blockers

Theoretically, concomitant use might cause additive effects on blood pressure and heart rate.
Some evidence shows that hawthorn might lower blood pressure and heart rate.

Likelihood Possible Evidence D
Calcium Channel Blockers

Theoretically, concomitant use might cause additive coronary vasodilation and hypotensive effects.
Some evidence shows that hawthorn might lower blood pressure due to vasodilatory effects.

Likelihood Possible Evidence D
Digoxin (Lanoxin)

Theoretically, hawthorn might potentiate the effects and adverse effects of digoxin.
Hawthorn appears to improve cardiac output; however, hawthorn does not appear to affect digoxin pharmacokinetics. Case reports suggest that at least one species of hawthorn root extract (Crataegus mexicana) may produce adverse effects similar to digoxin and can cross-react with digoxin assays, leading to falsely elevated plasma digoxin levels.

Likelihood Possible Evidence D
Hawthorn full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Hawthorn Berry 540 mg, from the product label.

NOW

See all NOW products
Name
NOW FOODS
Street Address
395 S. Glen Ellyn Rd.
City
Bloomingdale
State
IL
ZipCode
60108
Web Address
nowfoods.com
Pharmacist Counseling Corner

Hawthorn Berry 540 mg by NOW: Common Questions

Does Hawthorn Berry 540 mg by NOW interact with any medications?
Yes. Based on its ingredients, Hawthorn Berry 540 mg has a known interaction with 191 medications, including 14 rated major. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Hawthorn Berry 540 mg contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism 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 hawthorn if I'm on blood pressure medication?
Not without checking first. Hawthorn can lower blood pressure on its own, and combining it with beta-blockers or calcium channel blockers could drop your pressure too far. Talk to your pharmacist about your specific medications.
Is hawthorn safe during pregnancy or breastfeeding?
There isn't enough safety data to know either way. The facts we have advise against use in both situations. Talk with your doctor or pharmacist for personalized advice if you're pregnant or nursing.
What is hawthorn supposed to do?
Hawthorn has been traditionally used to support heart health and circulation. The clinical evidence we hold doesn't yet establish reliable effectiveness for specific conditions like angina, irregular heartbeat, or cardiovascular disease.
Are there any serious side effects?
Serious adverse effects are rare. Hawthorn is generally well tolerated, but isolated cases of multiorgan reactions and kidney problems have been reported. Palpitations and irregular heartbeat have occurred in small numbers of people with heart failure in trials.
Can I take hawthorn with my heart medication?
That depends on which one. Hawthorn can interact with nitrates, ED drugs, beta-blockers, blood thinners, calcium channel blockers, and digoxin. Use the medication checker on this page to look up yours, or ask your pharmacist.

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

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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.

Hawthorn Berry 540 mg label
Go deeper

The Full Monographs Behind Hawthorn Berry 540 mg’s Ingredients

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

Herb & supplement monograph

Hawthorn

Interacts with 191 drugs

Hawthorn is a plant traditionally used for heart-related complaints, and some studies suggest it may modestly help symptoms of mild heart failure when added to standard care. However, the ev...

Read the full Hawthorn monograph →
Sources

Sources & How We Checked

Hawthorn Berry 540 mg'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 25 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.

Hawthorn 25 references
  1. Tauchert M. Efficacy and safety of crataegus extract WS 1442 in comparison with placebo in patients with chronic stable New York Heart Association class-III heart failure. Am Heart J 2002;143:910-5. PubMed
  2. Pittler MH, Schmidt K, Ernst E. Hawthorn extract for treating chronic heart failure: meta-analysis of randomized trials. Am J Med 2003;114:665-74.. PubMed
  3. Chang Q, Zuo Z, Harrison F, Chow MS. Hawthorn. J Clin Pharmacol 2002;42:605-12.
  4. Holubarsch CJ, Colucci WS, Meinertz T, et al. The efficacy and safety of Crataegus extract WS 1442 in patients with heart failure: the SPICE trial. Eur J Heart Fail 2008;10:1255-63. PubMed
  5. Pittler MH, Guo R, and Ernst E. Hawthorn extract for treating chronic heart failure. Cochrane.Database.Syst Rev 2008:CD005312. PubMed
  6. Zick SM, Vautaw BM, Gillespie B, Aaronson KD. Hawthorn Extract Randomized Blinded Chronic Heart Failure (HERB CHF) trial. Eur J Heart Fail. 2009;11:990-99. PubMed
  7. Werner NS, Duschek S, and Schandry R. D-camphor-crataegus berry extract combination increases blood pressure and cognitive functioning in the elderly - a randomized, placebo controlled double blind study. Phytomedicine. 2009;16:1077-82. PubMed
  8. Dalli E, Colomer E, Tormos MC, et al. Crataegus laevigata decreases neutrophil elastase and has hypolipidemic effect: a randomized, double-blind, placebo-controlled trial. Phytomedicine. 6-15-2011;18:769-75. PubMed
  9. Maek-a-nantawat W, Phonrat B, Dhitavat J, et al. Safety and efficacy of CKBM-A01, a Chinese herbal medicine, among asymptomatic HIV patients. Southeast Asian J Trop.Med Public Health 2009;40:494-501.
  10. Asher GN, Viera AJ, Weaver MA, et al. Effect of hawthorn standardized extract on flow mediated dilation in prehypertensive and mildly hypertensive adults: a randomized, controlled cross-over trial. BMC.Complement Altern.Med 2012;12:26. PubMed
  11. Walker AF, Marakis G, Simpson E, et al. Hypotensive effects of hawthorn for patients with diabetes taking prescription drugs: a randomised controlled trial. Br J Gen.Pract 2006;56:437-43.
  12. Daniele C, Mazzanti G, Pittler MH, et al. Adverse-event profile of Crataegus spp.: a systematic review. Drug Saf 2006;29:523-35. PubMed
  13. Tankanow R, Tamer HR, Streetman DS, et al. Interaction study between digoxin and a preparation of hawthorn (Crataegus oxyacantha). J.Clin.Pharmacol. 2003;43:637-42. DOI
  14. Tauchert, M., Gildor, A., and Lipinski, J. [High-dose Crataegus extract WS 1442 in the treatment of NYHA stage II heart failure]. Herz 1999;24(6):465-474.
  15. Horoz, M., Gok, E., Genctoy, G., Ozcan, T., Olmaz, R., Akca, M., Kiykim, A., and Gurses, I. Crataegus orientalis associated multiorgan hypersensitivity reaction and acute renal failure. Intern.Med 2008;47(23):2039-2042. PubMed
  16. Dalli, E., Valles, J., Cosin-Sales, J., Santos, M. T., Moscardo, A., Milara, J., and Sotillo, J. F. Effects of hawthorn (Crataegus laevigata) on platelet aggregation in healthy volunteers. Thromb.Res 2011;128(4):398-400. PubMed
  17. Rogov VD. [Toxiderma due to the fruits of the hawthorn]. Vestn Dermatol Venerol 1984;7(7):46-47.
  18. Loew D, Albrecht M, and Podzuweit H. Efficacy and tolerability of a Hawthorn preparation in patients with heart failure Stage I and II according to NYHA - a surveillance study. Phytomedicine 1996;3(Suppl 1):92.
  19. Rababa'h AM, Altarabsheh SE, Haddad O, Deo SV, Obeidat Y, Al-Azzam S. Hawthorn Herb Increases the Risk of Bleeding after Cardiac Surgery: An Evidence-Based Approach. Heart Surg Forum 2016;19(4):E175-9. PubMed
  20. Shatoor AS, Soliman H, Al-Hashem F, Gamal BE, Othman A, El-Menshaw N. Effect of hawthorn (Crataegus aronia syn. Azarolus (L)) on platelet function in albino wistar rats. Thromb Res 2012;130(1):75-80. PubMed
  21. Vibes J, Lasserre B, Gleye J, Declume C. Inhibition of thromboxane A2 biosynthesis in vitro by the main components of Crataegus oxyacantha (hawthorn) flower heads. Prostaglandins Leukot Essent Fatty Acids 1994;50(4):173-5. PubMed
  22. Rogers KL, Grice ID, Griffiths LR. Inhibition of platelet aggregation and 5-HT release by extracts of Australian plants used traditionally as headache treatments. Eur J Pharm Sci 2000;9(4):355-63. PubMed
  23. Zhou CC, Huang XX, Gao PY, et al. Two new compounds from Crataegus pinnatifida and their antithrombotic activities. J Asian Nat Prod Res 2014;16(2):169-74.
  24. Palmer KG, Lebin JA, Cronin MT, Mazor SS, Burns RA. Crataegus mexicana (Tejocote) Exposure Associated with Cardiotoxicity and a Falsely Elevated Digoxin Level. J Med Toxicol. 2019;15(4):295-298. PubMed
  25. Espinosa J, Bassett R, Lucerna A, Finn D. Hawthorne root (Crataegus mexicana) toxicity. Am J Emerg Med. 2024;78:242.e5-242.e6. PubMed

See these in context on the Hawthorn 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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