Interactions on record — worth a quick check against your medications. Check your meds →
Dietary supplement

Relora Ingredients & Drug Interactions

by Pure Encapsulations

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

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

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

The interaction bottom line Most serious interaction: Moderate

Relora is a dietary supplement by Pure Encapsulations with 2 active ingredients. Its ingredients are commonly taken for anxiety and stress, sleep problems, digestive upset.Based on those ingredients, 1,160 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Phellodendron (Phellodendron amurense) extract, Magnolia (Magnolia officinalis) extract. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against Relora by Pure Encapsulations

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

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HelloPharmacist Scorecard of Relora by Pure Encapsulations

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 Sep 10, 2026

What’s inside

Low disclosure
Ingredient Transparency · database check
Low

Most active ingredients don't disclose an individual amount — you can't tell how much of each you're getting.

Why this rating?
  • The label discloses an exact amount for 0 of its 2 active ingredients.
  • “Relora Proprietary Patented Blend” is a proprietary blend — the label gives one combined amount (250 mg) without saying how much of each component you get.

Relora contains two active herbal extracts: magnolia (Magnolia officinalis) and phellodendron (Phellodendron amurense), combined in a proprietary blend. Magnolia bark has traditionally been used to support stress and mood; phellodendron, also called cork tree bark, contains berberine, a compound with a long history in herbal medicine.

The capsule itself is vegetarian, and the product includes inactive ingredients like plant fiber, starch, and silica.

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.

Why this rating?
  • The label markets this product for: Promotes satiety and moderates occasional stress.
  • We looked for evidence on: Anxiety, Stress, Obesity, appetite control, emotional wellness.
  • The closest evidence on file: Magnolia is rated "Insufficient Reliable Evidence To Rate" for Anxiety (Natural Medicines).
  • Also on file: Magnolia is rated "Insufficient Reliable Evidence To Rate" for Obesity, Stress.
  • Also on file: Phellodendron is rated "Insufficient Reliable Evidence To Rate" for Obesity, Stress.

The evidence for what Relora actually does is limited. Magnolia is rated possibly effective for gingivitis (gum inflammation) and plaque reduction, but for anxiety and hay fever, we don't have reliable evidence to rate it one way or the other.

Phellodendron is similarly understudied—we hold no solid evidence it works for acne, prostate health, diabetes, weight, joint problems, or ulcers. The product's main claimed benefits aren't backed by data we have on file.

The evidence, ingredient by ingredient Magnolia Phellodendron

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 2 of the 2 matched ingredients.
  • Pregnancy & breastfeeding safety ratings cover 2 of 2.
  • General safety write-ups exist for 2 of 2.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Magnolia is generally well tolerated when taken by mouth, though long-term safety data in humans is sparse. Phellodendron, too, appears tolerable short-term, but human safety information is limited.

In one clinical trial of a combination product with both extracts, a small number of participants reported side effects like sexual dysfunction, hand shaking, numbness around the mouth, fatigue, and headache—though it's unclear whether magnolia, phellodendron, or something else caused them. Magnolia is rated unsafe in pregnancy due to possible effects on the uterus.

Phellodendron (because of its berberine content) is also not safe in pregnancy and is rated likely unsafe during breastfeeding, since berberine can pass into breast milk and may harm the infant. Magnolia safety during breastfeeding is not well established and should be avoided.

Side effects, ingredient by ingredient Magnolia Phellodendron

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

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

Why this rating?
  • 2 of the 2 matched ingredients can interact with medications — Magnolia, Phellodendron.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; diabetes medications.
  • For scale: 1,161 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 Relora, check with your doctor or pharmacist if you take drugs metabolized by your liver (CYP2D6, CYP2C9, or CYP3A4 substrates—including many antidepressants, heart medications, and antihistamines), CNS depressants like benzodiazepines or opioids, blood thinners or antiplatelet drugs, blood pressure medications, diabetes drugs, or metformin. Phellodendron's berberine can slow how your body clears these drugs, potentially raising their levels and side effects.

Severity is Moderate across all these categories.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFormula with limited ingredient disclosure with no established evidence rating for its marketed use. Moderate medication interactions have been identified, and safety information is well characterized.

Relora may be worth considering if you're looking for a short-term stress support supplement and have no concerns about drug interactions—but the evidence that it actually works for anxiety or stress is not solid. If you take any medications for mood, sleep, blood pressure, blood clotting, diabetes, or anything metabolized by your liver, you need to check this product against your exact prescriptions before starting.

Talk it over with your own doctor or pharmacist to make sure it's right for your situation.

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

Assessment coverage: 2 of 2 active ingredients matched to our full ingredient reviews (monographs). Based on the product label dated Nov 22, 2022.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Relora, straight from the product label.

Brand Pure Encapsulations
Barcode (UPC) 766298006840
Net contents 180 Capsule(s)
Market status On market
Date entered into DSLD Nov 22, 2022
DSLD ID 278349
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Women (not pregnant or lactating), Gluten 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 Relora by Pure Encapsulations, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
1 Capsule(s)
Maximum serving Sizes:
1 Capsule(s)
Servings per container
180
UPC/BARCODE
766298006840
IngredientAmount% DV
Magnolia (Magnolia officinalis) extract0 NP--
Phellodendron (Phellodendron amurense) extract0 NP--
Relora Proprietary Patented Blend250 mg--

Other ingredients: Vegetarian Capsule, Modified Food and Corn Starch, hypoallergenic Plant Fiber, Ascorbyl Palmitate, Silicon Dioxide

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.
Storage

Store in a cool, dry place.

Suggested/Recommended/Usage/Directions

Recommendations: As a dietary supplement, take 1 capsule, 2 times daily, with or between meals.

Precautions

Warning: Not to be taken by pregnant or lactating women. If you have any health condition or are taking any medication, particularly psychiatric medication, consult your health professional before use. Do not use concurrently with antidepressants.

Keep out of the reach of children.

Use only if safety seal is intact.

General Statements

Scan to learn about our hypoallergenic supplements Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity.

Seals/Symbols

GFCO.org Certified Gluten-free by the Gluten-Free Certification Organization, www.gluten.org

Formulation

Promotes satiety and moderates occasional stress Gluten-free, non-GMO & hypoallergenic

Gluten-free, non-GMO & hypoallergenic

FDA Statement of Identity

Dietary Supplement

Brand IP Statement(s)

Relora & logo are trademarks of Lonza or its affiliates. Relora band magnolia officinalis and Phellodendron amurense.

FDA Disclaimer Statement

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

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

See for yourself

Relora by Pure Encapsulations label

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

Relora 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 Relora by Pure Encapsulations

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size1 Capsule(s) Dosage formCapsule Servings per container180 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Relora Proprietary Patented Blend

250 mg per serving

Other (inactive) ingredients: Vegetarian Capsule, Modified Food and Corn Starch, Hypoallergenic Plant Fiber, Ascorbyl Palmitate, Silicon Dioxide. These complete the product’s ingredient list but are not active constituents.

Interaction report

Relora by Pure Encapsulations Drug Interactions

Want to check YOUR meds against Relora?

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
1,160Drugs
1,160 Moderate

Ingredients driving the most interactions

Phellodendron (Phellodendron amurense) extract 1,160
Magnolia (Magnolia officinalis) extract 351

Individual Drug Interactions

The ingredients in Relora interact with 1,160 drugs. Click any drug to see the details.

2 of the 2 ingredients in Relora interact with drugs. Each result below shows which ingredient is responsible. Phellodendron (Phellodendron amurense) extract Magnolia (Magnolia officinalis) extract

Each ingredient & the kinds of drugs it affects

For each ingredient in Relora with known interactions, here are the types of medications they can affect. Open any type for the detail — or search your exact drug in the checker above.

Phellodendron (Phellodendron amurense) extract14 drug types · 1,160 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, phellodendron might increase the risk of bleeding when used with anticoagulant or antiplatelet drugs.
Phellodendron contains berberine. In vitro and in vivo research suggest that berberine can inhibit platelet aggregation. Theoretically, phellodendron might also inhibit platelet aggregation.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, phellodendron may increase the risk of hypoglycemia when taken with antidiabetes drugs.
Phellodendron contains berberine. Clinical research shows that berberine may lower blood glucose levels. Theoretically, phellodendron might also lower blood glucose levels.

Likelihood Possible Evidence D
Antihypertensive Drugs

Theoretically, phellodendron might have additive effects with antihypertensive drugs.
Phellodendron contains berberine. Animal research suggests that berberine can have hypotensive effects. Also, a clinical study suggests that taking berberine in combination with amlodipine can lower systolic and diastolic blood pressure when compared with amlodipine alone. Theoretically, phellodendron might also reduce blood pressure.

Likelihood Possible Evidence D
Cns Depressants

Theoretically, phellodendron might increase the sedative effects of CNS depressants.
Phellodendron contains berberine. Animal research suggests that berberine may have sedative effects. Theoretically, phellodendron might also have CNS depressants effects.

Likelihood Possible Evidence D
Cyclosporine (Neoral, Sandimmune)

Theoretically, phellodendron might increase blood levels of cyclosporine.
Phellodendron contains berberine. Preliminary clinical research shows that berberine can reduce metabolism of cyclosporine and increase serum levels, likely through inhibition of cytochrome P450 3A4 (CYP3A4), which metabolizes cyclosporine. Theoretically, phellodendron might also reduce the metabolism of cyclosporine.

Likelihood Possible Evidence D
Cytochrome P450 2C9 (Cyp2C9) Substrates

Theoretically, phellodendron might increase serum levels of drugs metabolized by CYP2C9.
Phellodendron contains berberine. Preliminary clinical research shows that berberine can inhibit CYP2C9. Theoretically, phellodendron might also inhibit CYP2C9.

Likelihood Possible Evidence D
Cytochrome P450 2D6 (Cyp2D6) Substrates

Theoretically, phellodendron might increase serum levels of drugs metabolized by CYP2D6.
Phellodendron contains berberine. In vitro research and preliminary clinical evidence show that berberine can inhibit CYP2D6. Theoretically, phellodendron might also inhibit CYP2D6.

Likelihood Possible Evidence D
Cytochrome P450 3A4 (Cyp3A4) Substrates

Theoretically, phellodendron might increase serum levels of drugs metabolized by CYP3A4.
Phellodendron contains berberine. In vitro research and preliminary clinical research show that berberine moderately inhibits CYP3A4. Theoretically, phellodendron might also inhibit CYP3A4.

Likelihood Possible Evidence D
Dextromethorphan (Robitussin Dm, Others)

Theoretically, phellodendron may increase serum levels of dextromethorphan.
Phellodendron contains berberine. Preliminary clinical research shows that berberine can inhibit cytochrome P450 2D6 (CYP2D6) activity and reduce the metabolism of dextromethorphan. Theoretically, phellodendron may also inhibit the metabolism of dextromethorphan.

Likelihood Possible Evidence D
Losartan (Cozaar)

Theoretically, phellodendron might reduce the therapeutic effects of losartan by decreasing its conversion to its active form.
Phellodendron contains berberine. Preliminary clinical research suggests that berberine can inhibit cytochrome P450 2C9 (CYP2C9) activity and reduce metabolism of losartan. Theoretically, phellodendron might also inhibit the metabolism of losartan.

Likelihood Possible Evidence D
Metformin (Glucophage)

Theoretically, phellodendron might increase the therapeutic and adverse effects of metformin.
Phellodendron contains berberine. In vitro and animal studies show that berberine can increase the systemic exposure and half-life of metformin, potentially increasing metformin's effects and side effects. This interaction seems to be most apparent when berberine is administered 2 hours prior to metformin. Taking berberine and metformin at the same time does not appear to increase systemic exposure to metformin. It is unclear if phellodendron might have this same effect.

Likelihood Possible Evidence D
Midazolam (Versed)

Theoretically, phellodendron might reduce metabolism of midazolam, which might increase the risk of severe adverse effects.
Phellodendron contains berberine. Preliminary clinical research shows that berberine can inhibit cytochrome P450 3A4 (CYP3A4) activity and reduce metabolism of midazolam. Theoretically, phellodendron might also inhibit the metabolism of midazolam.

Likelihood Possible Evidence D
Pentobarbital (Nembutal)

Theoretically, phellodendron might increase the sedative effect of pentobarbital.
Phellodendron contains berberine. Animal research shows that berberine can prolong pentobarbital-induced sleeping time. Theoretically, phellodendron might increase the sedative effects of pentobarbital.

Likelihood Possible Evidence D
Tacrolimus (Prograf)

Theoretically, phellodendron might increase blood levels of tacrolimus.
Phellodendron contains berberine. In a 16-year-old patient with idiopathic nephrotic syndrome who was being treated with tacrolimus 6.5 mg twice daily, intake of berberine 200 mg three times daily increased the blood concentration of tacrolimus from 8 to 22 ng/mL. Following a reduction of the tacrolimus dose to 3 mg daily, blood levels of tacrolimus decreased to 12 ng/mL. It is unclear if phellodendron might have this same effect.

Likelihood Possible Evidence D
Phellodendron (Phellodendron amurense) extract full monograph & interactions

Magnolia (Magnolia officinalis) extract2 drug types · 351 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, magnolia might have additive effects and increase the risk of bleeding when used with anticoagulant or antiplatelet drugs.
In vitro research shows that the chemicals magnolol and honokiol, isolated from magnolia bark, inhibit platelet aggregation that is experimentally induced by collagen and arachidonic acid. However, they do not inhibit platelet aggregation that is induced by adenosine diphosphate, platelet-activating factor, or thrombin. This interaction has not been reported in humans.

Likelihood Possible Evidence D
Cns Depressants

Theoretically, concomitant use of large doses of magnolia bark and CNS depressants might have additive effects.
In vitro and animal research shows that constituents extracted from magnolia bark, especially honokiol and magnolol, have sedative effects. These effects may be due to the inhibition of catecholamine release and modulation of gamma-aminobutyric acid-A (GABA-A) receptors.

Likelihood Possible Evidence D
Magnolia (Magnolia officinalis) extract full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Relora, from the product label.

Pure Encapsulations

See all Pure Encapsulations products
Name
Pure Encapsulations
Street Address
490 Boston Post Road
City
Sudbury
State
MA
Phone Number
1-800-753-2277
Web Address
www.PureEncapsulations.com
Pharmacist Counseling Corner

Relora by Pure Encapsulations: Common Questions

Does Relora by Pure Encapsulations interact with any medications?
Yes. Based on its ingredients, Relora has a known interaction with 1,160 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Relora contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is Relora safe to take while I'm pregnant or breastfeeding?
No—magnolia is rated unsafe in pregnancy because of potential effects on the uterus, and phellodendron is unsafe in pregnancy as well. Phellodendron is also likely unsafe while breastfeeding because berberine (its active compound) can pass into breast milk and may harm the infant. If you're pregnant or nursing, talk with your doctor or pharmacist before using any supplement.
What's the difference between the magnolia and phellodendron in this formula?
Magnolia (bark extract) is traditionally used to support relaxation; phellodendron (cork tree extract) contains berberine, a compound studied for various health effects. Together they're marketed as a stress-support blend, though solid evidence for either one in anxiety is limited.
Does Relora actually work for anxiety or stress?
The evidence isn't strong. For magnolia, we don't have reliable data showing it helps anxiety. Phellodendron has even less evidence for its claimed uses. If you're considering it for stress or anxiety, it's worth discussing with your doctor whether this is the right choice for you.
I'm taking metformin for diabetes. Can I use Relora?
Not without checking first. Phellodendron (via its berberine) may increase metformin's effects and side effects, and it can also lower blood sugar further on its own. Talk with your doctor or pharmacist before adding this product—they can advise whether it's safe for your situation.
Are there any side effects I should know about?
Magnolia and phellodendron are generally well tolerated when taken by mouth. In one clinical trial of a similar combination product, a small number of people reported side effects like sexual dysfunction, hand tremor, numbness, fatigue, and headache, though it's unclear what caused them. If you notice anything unusual after starting, stop and contact your pharmacist or doctor.
What are the inactive ingredients in Relora?
The capsule is vegetarian, and the product contains plant fiber, modified food and corn starch, ascorbyl palmitate (a form of vitamin C), and silicon dioxide as inactive ingredients—no major allergens, but these are fillers and binders standard in capsules.

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.

Relora label
Go deeper

The Full Monographs Behind Relora’s Ingredients

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

Herb & supplement monograph

Magnolia

Interacts with 351 drugs

Magnolia bark and flower buds have a long history in traditional Chinese and Japanese medicine, often for stress, sleep, and digestion. Modern human research is still limited, so we can't be...

Read the full Magnolia monograph → Herb & supplement monograph

Phellodendron

Interacts with 1,160 drugs

Phellodendron is a traditional Chinese medicine bark (Huang Bai) that contains berberine and other plant compounds with antimicrobial and anti-inflammatory activity in lab studies. Human evi...

Read the full Phellodendron monograph →
Sources

Sources & How We Checked

Relora'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 31 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.

Magnolia 9 references
  1. Kuribara H, Kishi E, Hattori N, et al. The anxiolytic effect of two oriental herbal drugs in Japan attributed to honokiol from magnolia bark. J Pharm Pharmacol 2000;52:1425-9. PubMed
  2. Tachikawa E, Takahashi M, Kashimoto T. Effects of extract and ingredients isolated from Magnolia obovata thunberg on catecholamine secretion from bovine adrenal chromaffin cells. Biochem Pharmacol 2000;60:433-40. PubMed
  3. Jung KY, Kim DS, Oh SR, et al. Magnone A and B, novel anti-PAF tetrahydrofuran lignans from the flower buds of Magnolia fargesii. J Nat Prod 1998;61:808-11.
  4. Garrison R, Chambliss WG. Effect of a proprietary Magnolia and Phellodendron extract on weight management: a pilot, double-blind, placebo-controlled clinical trial. Altern Ther Health Med 2006;12:50-4.
  5. Teng CM, Chen CC, Ko FN, et al. Two antiplatelet agents from Magnolia officinalis. Thromb Res 1988;50:757-65. PubMed
  6. Ghys K, De Palma A, Vandevenne A, Werbrouck J, Goossens A. Magnolia officinalis bark extract, a recently identified contact allergen in 'anti-ageing' cosmetics. Contact Dermatitis. 2015 Aug;73(2):130-2.
  7. Raison-Peyron N, Césaire A, Du-Thanh A, Dereure O. Allergic contact dermatitis caused by Magnolia officinalis bark extract in a facial anti-ageing cream. Contact Dermatitis. 2015 Jun;72(6):416-7.
  8. Nilausen TD, Johansen JD, Thyssen JP. Allergic contact dermatitis of the face caused by Magnolia officinalis bark extract. Contact Dermatitis. 2016;75(6):385-87.
  9. Amat-Samaranch V, López-Sánchez C, Tubau C, Puig L, Serra-Baldrich E. Vulvar allergic contact dermatitis caused by Magnolia officinalis bark extract. Contact Dermatitis 2022;87(1):96-97.

See these in context on the Magnolia monograph →

Phellodendron 22 references
  1. Chan E. Displacement of bilirubin from albumin by berberine. Biol Neonate 1993;63:201-8. PubMed
  2. Janbaz KH, Gilani AH. Studies on preventive and curative effects of berberine on chemical-induced hepatotoxicity in rodents. Fitoterapia 2000;71:25-33.. PubMed
  3. Wu X, Li Q, Xin H, Yu A, Zhong M. Effects of berberine on the blood concentration of cyclosporin A in renal transplanted recipients: clinical and pharmacokinetic study. Eur J Clin Pharmacol 2005;61:567-72. PubMed
  4. Garrison R, Chambliss WG. Effect of a proprietary Magnolia and Phellodendron extract on weight management: a pilot, double-blind, placebo-controlled clinical trial. Altern Ther Health Med 2006;12:50-4.
  5. Zhang Y, Li X, Zou D, et al. Treatment of type 2 diabetes and dyslipidemia with the natural plant alkaloid berberine. J Clin Endocrinol Metab 2008;93:2559-65. PubMed
  6. Budzinski JW, Foster BC, Vandenhoek S, Arnason JT. An in vitro evaluation of human cytochrome P450 3A4 inhibition by selected commercial herbal extracts and tinctures. Phytomedicine 2000;7:273-82. PubMed
  7. Chatterjee P, Franklin MR. Human cytochrome p450 inhibition and metabolic-intermediate complex formation by goldenseal extract and its methylenedioxyphenyl components. Drug Metab Dispos 2003;31:1391-7. PubMed
  8. Shanbhag, S. M., Kulkarni, H. J., and Gaitonde, B. B. Pharmacological actions of berberine on the central nervous system. Jpn.J Pharmacol 1970;20(4):482-487. PubMed
  9. Wu, J. F. and Liu, T. P. [Effects of berberine on platelet aggregation and plasma levels of TXB2 and 6-keto-PGF1 alpha in rats with reversible middle cerebral artery occlusion]. Yao Xue.Xue.Bao. 1995;30(2):98-102.
  10. Peng, W. H., Hsieh, M. T., and Wu, C. R. Effect of long-term administration of berberine on scopolamine-induced amnesia in rats. Jpn J Pharmacol 1997;74(3):261-266. DOI
  11. Sabir M and Bhide NK. Study of some pharmacological actions of berberine. Ind J Physiol & Pharmac 1971;15(3):111-132.
  12. Tripathi YB and Shukla SD. Berberis artistata inhibits PAF induced aggregation of rabbit platelets. Phytotherapy Research 1996;10:628-630.
  13. Yin, J., Xing, H., and Ye, J. Efficacy of berberine in patients with type 2 diabetes mellitus. Metabolism 2008;57(5):712-717. PubMed
  14. Zhang, H., Wei, J., Xue, R., Wu, J. D., Zhao, W., Wang, Z. Z., Wang, S. K., Zhou, Z. X., Song, D. Q., Wang, Y. M., Pan, H. N., Kong, W. J., and Jiang, J. D. Berberine lowers blood glucose in type 2 diabetes mellitus patients through increasing insulin re
  15. Guo, Y., Chen, Y., Tan, Z. R., Klaassen, C. D., and Zhou, H. H. Repeated administration of berberine inhibits cytochromes P450 in humans. Eur J Clin Pharmacol 2012;68(2):213-217. PubMed
  16. Wei, W., Zhao, H., Wang, A., Sui, M., Liang, K., Deng, H., Ma, Y., Zhang, Y., Zhang, H., and Guan, Y. A clinical study on the short-term effect of berberine in comparison to metformin on the metabolic characteristics of women with polycystic ovary syndro
  17. Hermann, R. and von, Richter O. Clinical evidence of herbal drugs as perpetrators of pharmacokinetic drug interactions. Planta Med 2012;78(13):1458-1477. PubMed
  18. Chun YT, Yip TT, Lau KL, and et al. A biochemical study on the hypotensive effect of berberine in rats. Gen Pharmac 1979;10:177-182. PubMed
  19. Hou Q, Han W, Fu X. Pharmacokinetic interaction between tacrolimus and berberine in a child with idiopathic nephrotic syndrome. Eur J Clin Pharmacol 2013;69(10):1861-2. PubMed
  20. Lan J, Zhao Y, Dong F, et al. Meta-analysis of the effect and safety of berberine in the treatment of type 2 diabetes mellitus, hyperlipemia and hypertension. J Ethnopharmacol. 2015;161:69-81. PubMed
  21. Kalman DS, Feldman S, Feldman R, et al. Effect of a proprietary magnolia and phellodendron extract on stress levels in healthy women: a pilot, double-blind, placebo-controlled clinical trial. Nutr J 2008;7:11.
  22. Lyu Y, Zhang Y, Yang M, et al. Pharmacokinetic interactions between metformin and berberine in rats: Role of oral administration sequences and microbiota. Life Sci. 2019;235:116818. PubMed

See these in context on the Phellodendron monograph →

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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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