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Dietary supplement

Cassia Ingredients & Drug Interactions

by doTERRA

Cassia label
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Liquid Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 23, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Cassia 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

Cassia is a dietary supplement by doTERRA with 1 active ingredient. Its ingredients are commonly taken for flavoring food, digestive upset, blood sugar support.Based on those ingredients, 512 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Cassia. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Cassia by doTERRA

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

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HelloPharmacist Scorecard of Cassia by doTERRA

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 12, 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.
  • “Cassia” is listed as a grouped ingredient — the label gives one combined amount (60 mg) without saying how much of each component you get.

This product contains one active ingredient: Cinnamomum cassia, commonly known as cassia cinnamon. It's sold as a liquid extract by doTERRA and contains no inactive filler ingredients.

Does it work?

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

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

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

The evidence for cassia cinnamon's effectiveness isn't established for the conditions tested — amenorrhea, angina, common cold, diabetes, diarrhea, and dyslipidemia (high cholesterol) all have insufficient reliable evidence to rate in our data. That means we don't have enough solid research yet to say whether it works for these.

The evidence, ingredient by ingredient Indian Cassia Cassia Cinnamon

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.

Cassia cinnamon is generally well tolerated in food amounts, but the safety notes caution against medicinal or high-dose supplement amounts, especially over time. That's because cassia contains coumarin, which can harm the liver with very large doses (50–7,000 mg daily of coumarin itself causes liver injury in humans that reverses when stopped).

In clinical trials, daily doses of 360 mg to 12 grams for 3 months did not significantly raise liver enzyme levels, but concentrated supplement doses warrant caution. A small number of trial participants reported a rash, and one case of contact dermatitis to dietary cinnamon was documented in someone with a known cinnamon allergy.

A hypoglycemic seizure (low blood sugar event) was reported in one patient after one dose, though a causal link is unclear. During pregnancy and lactation, food amounts are likely safe, but avoid medicinal or high-dose supplement amounts due to limited safety data.

Side effects, ingredient by ingredient Indian Cassia Cassia Cinnamon

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

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

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Cassia Cinnamon.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications.
  • For scale: 443 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.

Check with your pharmacist if you take any medications that can harm the liver (hepatotoxic drugs) or any diabetes medications (antidiabetes agents). Both are Moderate interactions with cassia, and your liver or blood sugar may need monitoring, or your medication dose may need adjustment.

Check your own medication Run your meds through the checker above

The bottom line

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

Cassia cinnamon is generally well tolerated, but if you take diabetes medications or drugs that can affect your liver, talk with your pharmacist before adding this product. If you have a cinnamon allergy, avoid it.

The evidence for its effectiveness on common health issues isn't solid yet.

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 Oct 22, 2021.

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 Cassia, straight from the product label.

Brand doTERRA
Net contents 15 Milliliter(s); 0.5 Fluid Ounce(s)
Market status On market
Date entered into DSLD Oct 22, 2021
DSLD ID 256739
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other
Intended target group(s) Adult (18 - 50 Years)
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 Cassia by doTERRA, 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 Drop(s)
Maximum serving Sizes:
1 Drop(s)
Servings per container
250
IngredientAmount% DV
Cassia60 mg--
Cinnamomum cassia15 mL--

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

For aromatic or topical use.

Diffuse aromatically or, to apply topically, dilute 1 drop essential oil to 10 drops carrier oil.

For internal use dilute one drop in 4 fl oz of liquid.

Precautions

Caution: Possible skin sensitivity.

Keep out of reach of children.

If pregnant or under a doctor's care, consult your physician.

Avoid contact with eyes, inner ears, and sensitive areas.

Formula

Cinnamomum cassia 15 ml

FDA Statement of Identity

Essential Oil Supplement

General Statements

CPTG Certified Pure Therapeutic Grade

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

See for yourself

Cassia by doTERRA label

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

Cassia 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 Cassia by doTERRA

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

Serving size1 Drop(s) Dosage formLiquid Servings per container250 Amounts shown are per serving.

Cassia

Interacts with
161 drugs
60 mg per serving

Indian Cassia (Cinnamomum tamala), also known as Indian bay leaf or tejpat, is an aromatic leaf used widely as a cooking spice and in traditional medi...

Cassia monograph & interactions
Interaction report

Cassia by doTERRA Drug Interactions

Want to check YOUR meds against Cassia?

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
512Drugs
512 Moderate

Ingredients driving the most interactions

Cassia 161

Individual Drug Interactions

The ingredients in Cassia interact with 512 drugs. Click any drug to see the details.

1 of the 1 ingredient in Cassia interact with drugs. Each result below shows which ingredient is responsible. Cassia

Each ingredient & the kinds of drugs it affects

For each ingredient in Cassia 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.

Cassia2 drug types · 161 drugs

Antidiabetes Drugs

Theoretically, Indian cassia might have additive effects with antidiabetes drugs. Clinical research shows that taking Indian cassia 10 grams three times daily for 3 months while following a reduced carbohydrate diet can decrease fasting blood glucose levels by up to 41% in patients with diabetes. Monitor blood glucose levels closely; dose adjustments of antidiabetes drugs might be necessary.

Likelihood Possible Evidence B
Diuretic Drugs

Theoretically, Indian cassia might increase the risk of potassium depletion in patients taking diuretic drugs. However, this has not been shown in humans. Indian cassia leaf extract 200-400 mg/kg body weight has shown mild diuretic activity in animal research. The effect of Indian cassia on urine volume and electrolyte loss was similar to that of furosemide. Until more is known, use with caution.

Likelihood Possible Evidence D
Cassia full monograph & interactions
The maker

Brand information

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

doTERRA

See all doTERRA products
Name
doTERRA Intl, LLC
Street Address
389 South 1300 West
City
Pleasant Grove
State
UT
ZipCode
84062
Pharmacist Counseling Corner

Cassia by doTERRA: Common Questions

Does Cassia by doTERRA interact with any medications?
Yes. Based on its ingredients, Cassia has a known interaction with 512 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Cassia 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.
Is cassia cinnamon safe during pregnancy or breastfeeding?
Food amounts are likely safe, but avoid medicinal or high-dose supplement amounts during pregnancy and breastfeeding because there isn't enough safety data. Talk with your doctor or pharmacist about whether this product is right for you.
Can this product help with diabetes?
The evidence we hold is insufficient to rate cassia cinnamon for diabetes. That said, cassia may lower blood sugar, so if you take diabetes medications, don't add it without checking with your pharmacist first — your dose may need adjusting.
What side effects have been reported?
A small number of trial participants reported a rash, and there's one documented case of contact dermatitis in someone with a cinnamon allergy. One case of a hypoglycemic seizure (very low blood sugar event) was reported in a patient, though it's unclear if cassia caused it. Overall, it's well tolerated in tested doses.
Can cassia damage my liver?
In clinical trials at typical supplement doses (360 mg to 12 grams daily for 3 months), liver enzyme levels did not rise significantly. However, very high doses of coumarin (the active compound in cassia) can harm the liver over extended use. Food amounts are safe; stick to recommended doses and avoid long-term high-dose use.
Does this product contain any fillers or other ingredients?
No — this liquid extract is pure cassia cinnamon with no inactive ingredients listed.

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.

Cassia label
Go deeper

The Full Monographs Behind Cassia’s Ingredients

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

Herb & supplement monograph

Indian Cassia

Interacts with 161 drugs

Indian Cassia (Cinnamomum tamala), also known as Indian bay leaf or tejpat, is an aromatic leaf used widely as a cooking spice and in traditional medicine across South Asia. Human evidence f...

Read the full Indian Cassia monograph → Herb & supplement monograph

Cassia Cinnamon

Interacts with 442 drugs

Cassia cinnamon is the common, inexpensive cinnamon used in cooking, and it is also taken as a supplement, most often for blood sugar support. The evidence for its health benefits is mixed a...

Read the full Cassia Cinnamon monograph →
Sources

Sources & How We Checked

Cassia'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 23 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.

Indian Cassia 3 references
  1. Singh TN, Upadhyay BN, Tewari CM, Tripathi SN. Management of diabetes mellitus (prameha) with inula racemosa and cinnamomum tamala. Anc Sci Life. 1985 Jul;5(1):9-16.
  2. Rahman M, Khatun A, Islam MM, et al. Evaluation of antimicrobial, cytotoxic, thrombolytic, diuretic properties and total phenolic content of Cinnamomum tamala. International Journal of Green Pharmacy. 2013 Jul 1;7(3):236. DOI
  3. Konda MR, Alluri KV, Janardhanan PK, Trimurtulu G, Sengupta K. Combined extracts of Garcinia mangostana fruit rind and Cinnamomum tamala leaf supplementation enhances muscle strength and endurance in resistance trained males. J Int Soc Sports Nutr 2018;15

See these in context on the Indian Cassia monograph →

Cassia Cinnamon 20 references
  1. Electronic Code of Federal Regulations. Title 21. Part 182 -- Substances Generally Recognized As Safe. Available at: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?CFRPart=182
  2. Khan A, Safdar M, Ali Khan M, et al. Cinnamon improves glucose and lipids of people with type 2 diabetes. Diabetes Care 2003;26:3215-8. PubMed
  3. De Benito V, Alzaga R. Occupational allergic contact dermatitis from cassia (Chinese cinnamon) as a flavouring agent in coffee. Contact Dermatitis 1999;40:165. PubMed
  4. Drake TE, Maibach HI. Allergic contact dermatitis and stomatitis caused by a cinnamic aldehyde-flavored toothpaste. Arch Dermatol 1976;112:202-3.
  5. Press release. Cinnamon capsules to reduce blood sugar are medicinal products! Efficacy has not been scientifically proven - some products contain high levels of coumarin. Federal Institute of Risk Assessment (BfM), Germany, November 11, 2006. Available a
  6. Felter SP, Vassallo JD, Carlton BD, Daston GP. A safety assessment of coumarin taking into account species-specificity of toxicokinetics. Food Chem Toxicol 2006;44:462-75. PubMed
  7. Crawford P. Effectiveness of cinnamon for lowering hemoglobin A1C in patients with type 2 diabetes: a randomized, controlled trial. J Am Board Fam Med 2009;22:507-12. PubMed
  8. Akilen, R., Tsiami, A., Devendra, D., and Robinson, N. Glycated haemoglobin and blood pressure-lowering effect of cinnamon in multi-ethnic Type 2 diabetic patients in the UK: a randomized, placebo-controlled, double-blind clinical trial. Diabet.Med. 2010; PubMed
  9. Lu T, Sheng H Wu J Cheng Y Zhu J Chen Y. Cinnamon extract improves fasting blood glucose and glycosylated hemoglobin level in Chinese patients with type 2 diabetes. Nutr Res. 2012;32(6):408-412. PubMed
  10. Choi, J., Lee, K. T., Ka, H., Jung, W. T., Jung, H. J., and Park, H. J. Constituents of the essential oil of the Cinnamomum cassia stem bark and the biological properties. Arch Pharm Res 2001;24(5):418-423.
  11. Altschuler JA, Casella SJ, MacKenzie TA, Curtis KM. The effect of cinnamon on A1C among adolescents with type 1 diabetes. Diabetes Care 2007;30(4):813-6. PubMed
  12. Stoecker BR, Zhan Z, Luo R, et al. Cinnamon extract lowers blood glucose in hyperglycemic subjects. FASEB J. 2010;22:722.1 (Abstract only). DOI
  13. Admani S, Hill H, Jacob SE. Cinnamon Sugar Scrub Dermatitis: "Natural" Is Not Always Best. Pediatr Dermatol. 2017;34(1):e42-e43. PubMed
  14. Isaac-Renton M, Li MK, Parsons LM. Cinnamon spice and everything not nice: many features of intraoral allergy to cinnamic aldehyde. Dermatitis. 2015;26(3):116-21. PubMed
  15. Vandersall A, Katta R. Eyelid dermatitis as a manifestation of systemic contact dermatitis to cinnamon. Dermatitis. 2015 Jul-Aug;26(4):189. PubMed
  16. Wickenberg J, Lindstedt S, Nilsson J, Hlebowicz J. Cassia cinnamon does not change the insulin sensitivity or the liver enzymes in subjects with impaired glucose tolerance. Nutr J 2014 Sep 24;13:96. PubMed
  17. Brancheau D, Patel B, Zughaib M. Do cinnamon supplements cause acute hepatitis? Am J Case Rep 2015;16:250-4. PubMed
  18. Shekarchizadeh-Esfahani P, Heydarpour F, Izadi F, Jalili C. The effect of cinnamon supplementation on liver enzymes in adults: A systematic review and meta-analysis of randomized controlled trials. Complement Ther Med 2021;58:102699. PubMed
  19. Bernaola J, Valverde-Monge M, Otal-Buesa M, Cullen D, Heras-Mendaza F. Cinnamon allergic contact cheilitis. Contact Dermatitis 2023;88(5):418-419. PubMed
  20. Patel K, Howard M, Tate B. Cheilitis caused by allergic contact dermatitis to cinnamon in chai tea: A case report. Contact Dermatitis 2023;88(3):239-240. PubMed

See these in context on the Cassia Cinnamon 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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