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

SinuCare Ingredients & Drug Interactions

by Terry Naturally

SinuCare label
See full label image
Softgel 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 SinuCare 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

SinuCare is a dietary supplement by Terry Naturally with 2 active ingredients. Its ingredients are commonly taken for cough and chest congestion, colds and flu symptoms, stuffy nose.Based on those ingredients, 878 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Eucalyptus (Eucalyptus radiata) leaf oil. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

Jump to a section

Check Your Meds Against SinuCare by Terry Naturally

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

Pharmacist-reviewed data Checks every ingredient Answer in seconds
Prefer a human? Send your question to our licensed pharmacists — free, answered by email within 24 hours.

HelloPharmacist Scorecard of SinuCare by Terry Naturally

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.
  • “Proprietary Formula” is a proprietary blend — the label gives one combined amount (320 mg) without saying how much of each component you get.

SinuCare contains 2 active ingredients: eucalyptus leaf oil and myrtle leaf oil, both essential oils traditionally used to support sinus and respiratory health. The product also contains inactive ingredients — extra virgin olive oil, gelatin, glycerol, and water — which serve as carriers and capsule material.

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: supports sinus and bronchial airway passages.
  • We looked for evidence on: Rhinosinusitis, Bronchitis, Cough, Respiratory tract infections, nasal congestion, airway clearance.
  • The closest evidence on file: Myrtle is rated "Insufficient Reliable Evidence To Rate" for Respiratory tract infections (Natural Medicines).
  • Also on file: Eucalyptus is rated "Insufficient Reliable Evidence To Rate" for Bronchitis, Cough, Rhinosinusitis.

The effectiveness of both eucalyptus and myrtle for acne, bronchitis, asthma, burns, cancer, respiratory tract infections, diarrhea, GERD, and gingivitis is rated as insufficient reliable evidence in the data we hold. This means the scientific evidence for these uses hasn't been established well enough to make a clear recommendation either way.

The evidence, ingredient by ingredient Eucalyptus Myrtle

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.

Eucalyptus leaf oil is generally well tolerated when used in small amounts diluted or inhaled, but the undiluted oil can be toxic if swallowed — even 1 mL of straight oil has caused serious toxicity including central nervous system depression, seizures, coma, and death. Common side effects from oral use include diarrhea, nausea, and vomiting; topical use may cause burning, itching, redness, or stinging.

Myrtle leaf oil has limited safety data. Topically it's generally well tolerated; the main concern is dry skin.

Oral use carries rare risk of very serious effects like respiratory failure, and it's advised against during pregnancy and breastfeeding because there isn't enough safety information. For eucalyptus, pregnancy and lactation are rated likely safe.

The safety data for myrtle during pregnancy and lactation advises against use.

Side effects, ingredient by ingredient Eucalyptus Myrtle

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 2 matched ingredients can interact with medications — Eucalyptus.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: diabetes medications.
  • For scale: 879 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 SinuCare, check with your doctor or pharmacist if you take any medications processed by your liver (CYP1A2, CYP2C19, CYP2C9, or CYP3A4 substrates — Moderate severity), diabetes drugs, amphetamines, or pentobarbital. These interactions are based on test-tube and animal research, not confirmed in people, but the potential exists.

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.

SinuCare may appeal to people seeking natural sinus and respiratory support, but the evidence for its effectiveness isn't established. If you take diabetes medications, ADHD stimulants, seizure drugs, blood thinners, or any medication processed by your liver, talk with your doctor or pharmacist before starting this product — the eucalyptus content carries theoretical interactions that haven't been tested in humans.

Keep the product away from children and never swallow the undiluted oil.

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 May 24, 2018.

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 SinuCare, straight from the product label.

Brand Terry Naturally
Barcode (UPC) 367703310035
Net contents 30 Softgel(s)
Market status On market
Date entered into DSLD May 24, 2018
DSLD ID 177206
Product type Botanical
Supplement form Softgel Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten Free, Dairy Free, Sugar 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 SinuCare by Terry Naturally, 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 Softgel(s)
Maximum serving Sizes:
2 Softgel(s)
Servings per container
15
UPC/BARCODE
367703310035
IngredientAmount% DV
Proprietary Formula320 mg--
Eucalyptus (Eucalyptus radiata) leaf oil0 NP--
Myrtle (Myrtus communis) leaf oil0 NP--

Other ingredients: extra virgin Olive Oil, Gelatin, Glycerol, Water

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.
General Statements

Money-back guarantee

- Goes to work immediately for results you can feel - Does not cause drowsiness or jitteriness - Supports both the sinus and bronchial airway passages

These unique botanical extracts have been shown to directly provide effective respiratory system support in part by their ability to support healthy cilia activity.

The nose and sinuses are lined with complex tissues that secrete mucus, which keeps the lining hydrated and acts as a barrier by trapping inhaled particles. It is the job of the cilia to brush the mucus in a direction leading out of the sinus and nasal cavities. Healthy cilia function is required for clear and comfortable sinuses!

Plant oils are 75 to 100 times more concentrated than dry herbs.

Immediate action

Sinus, bronchial, and lung support Soothes mucous membranes Non-drowsy For your good health Terry

Product of Belgium

Formulation

No sugar, salt, yeast, wheat, gluten, corn, soy, dairy products, artificial coloring, artificial flavoring, or artificial preservatives.

Non-GMO

Suggested/Recommended/Usage/Directions

Recommendations: 1 to 2 softgels, three times daily, or as needed.

Precautions

If pregnant or nursing, consult a health care practitioner before using.

Storage

Store in a cool, dry place.

Brand IP Statement(s)

Why SinuCare? Immediate action!

Terry Naturally EuroPharma

Formula

SinuCare provides the soothing support of Eucalyptus and Myrtle to help you breathe easy.

Amazing Ingredients! SinuCare provides Eucalyptus and Myrtle to support sinus, bronchial, lung, and entire upper respiratory function. - Refreshing Eucalyptus (Eucalyptus radiata) has long been studied and shown to support healthy, clear sinus passages. - Strong Myrtle (Myrtus communis) supports a healthy respiratory environment, and provides the key compound, 1,8 cineole for effective support!

With Eucalyptus

FDA Statement of Identity

Dietary Supplement

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.

General

JC 34 91 + 3(5,6)EP BX31003.05

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

See for yourself

SinuCare by Terry Naturally label

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

SinuCare 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 SinuCare by Terry Naturally

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

Serving size1 Softgel(s) Dosage formSoftgel Capsule Servings per container15 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.

Proprietary Formula

320 mg per serving

Other (inactive) ingredients: Extra virgin Olive Oil, Gelatin, Glycerol, Water. These complete the product’s ingredient list but are not active constituents.

Interaction report

SinuCare by Terry Naturally Drug Interactions

Want to check YOUR meds against SinuCare?

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
878Drugs
878 Moderate

Ingredients driving the most interactions

Eucalyptus (Eucalyptus radiata) leaf oil 878

Individual Drug Interactions

The ingredients in SinuCare interact with 878 drugs. Click any drug to see the details.

1 of the 2 ingredients in SinuCare interact with drugs. Each result below shows which ingredient is responsible. Eucalyptus (Eucalyptus radiata) leaf oil

Each ingredient & the kinds of drugs it affects

For each ingredient in SinuCare 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.

Eucalyptus (Eucalyptus radiata) leaf oil7 drug types · 878 drugs

Amphetamines

Theoretically, inhaling eucalyptol may reduce the effectiveness of amphetamines.
Animal research suggests that inhaling eucalyptol may reduce the levels of amphetamines in the blood.

Likelihood Possible Evidence D
Antidiabetes Drugs

Theoretically, eucalyptus leaf might increase the risk of hypoglycemia.
Animal research suggests that eucalyptus leaf might have hypoglycemic activity, and might have additive effects when used with antidiabetes drugs.

Likelihood Possible Evidence D
Cytochrome P450 1A2 (Cyp1A2) Substrates

Theoretically, eucalyptus might increase the levels of CYP1A2 substrates.
In vitro research suggests that eucalyptus oil might inhibit CYP1A2, although this has not been reported in humans.

Likelihood Possible Evidence D
Cytochrome P450 2C19 (Cyp2C19) Substrates

Theoretically, eucalyptus might increase the levels of CYP2C19 substrates.
In vitro research suggests that eucalyptus oil might inhibit CYP2C19, although this has not been reported in humans.

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

Theoretically, eucalyptus might increase the levels of CYP2C9 substrates.
In vitro research suggests that eucalyptus oil might inhibit CYP2C9, although this has not been reported in humans.

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

Theoretically, eucalyptus might increase the levels of CYP3A4 substrates.
In vitro research suggests that eucalyptus oil might inhibit CYP3A4, although this has not been reported in humans.

Likelihood Possible Evidence D
Pentobarbital (Nembutal)

Theoretically, inhaling eucalyptol might reduce the effectiveness of pentobarbital.
Animal research suggests that inhaling eucalyptol reduces the level of pentobarbital that reaches the brain.

Likelihood Possible Evidence D
Eucalyptus (Eucalyptus radiata) leaf oil full monograph & interactions
The maker

Brand information

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

Terry Naturally

See all Terry Naturally products
Name
EuroPharma, Inc.
City
Green Bay
State
WI
ZipCode
54311
Phone Number
(866) 807-2731
Web Address
EuroPharmaUSA.com
Pharmacist Counseling Corner

SinuCare by Terry Naturally: Common Questions

Does SinuCare by Terry Naturally interact with any medications?
Yes. Based on its ingredients, SinuCare has a known interaction with 878 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
SinuCare 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.
Can I take SinuCare if I'm pregnant or breastfeeding?
Eucalyptus is rated likely safe during pregnancy and lactation. Myrtle, however, is rated likely unsafe during pregnancy and has unknown safety while breastfeeding, so it should be avoided during both. Talk with your doctor or pharmacist about whether this product is right for you in your particular situation.
What are the side effects of eucalyptus?
Common side effects from swallowing diluted eucalyptus oil include diarrhea, nausea, and vomiting. Applied to skin, it may cause burning, itching, redness, or stinging. The undiluted oil can be poisonous if swallowed and has caused seizures, coma, and serious breathing problems even at very small doses.
What should I know about myrtle in this product?
Myrtle has limited safety data. Topically, dry skin is the main concern. Orally, very large amounts of undiluted myrtle oil can cause serious breathing problems, and it's advised against during pregnancy and breastfeeding.
Does SinuCare actually work for sinus or respiratory problems?
The evidence for eucalyptus and myrtle for sinus and respiratory conditions like bronchitis or asthma is rated insufficient to make a clear recommendation. More rigorous research would be needed to confirm whether they work.
Is SinuCare safe to take with my other medications?
Eucalyptus theoretically interacts with many medications, especially diabetes drugs and medications processed by your liver. Use the search tool on this page to check your exact medications, and talk with your doctor or pharmacist before starting.

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

Not sure if SinuCare is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.

SinuCare label
Go deeper

The Full Monographs Behind SinuCare’s Ingredients

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

Herb & supplement monograph

Eucalyptus

Interacts with 878 drugs

Eucalyptus is best known for its strong-smelling oil used in vapor rubs, inhalants, and lozenges to ease coughs and congestion. It may provide mild, short-term relief of cold symptoms, but t...

Read the full Eucalyptus monograph → Herb & supplement monograph

Myrtle

Myrtle (Myrtus communis) is a Mediterranean shrub used traditionally for respiratory, digestive, and skin complaints. Modern research is mostly limited to laboratory and small studies, so it...

Read the full Myrtle monograph →
Sources

Sources & How We Checked

SinuCare'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 26 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.

Eucalyptus 23 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. Unger M, Frank A. Simultaneous determination of the inhibitory potency of herbal extracts on the activity of six major cytochrome P450 enzymes using liquid chromatography/mass spectrometry and automated online extraction. Rapid Commun Mass Spectrom 2004;1 PubMed
  3. De Vincenzi M, Silano M, De Vincenzi A, et al. Constituents of aromatic plants: eucalyptol. Fitoterapia 2002;73:269-75. PubMed
  4. Gray AM, Flatt PR. Antihyperglycemic actions of Eucalyptus globulus (Eucalyptus) are associated with pancreatic and extra-pancreatic effects in mice. J Nutr 1998;128:2319-23. PubMed
  5. Whitman BW, Ghazizadeh H. Eucalyptus oil: therapeutic and toxic aspects of pharmacology in humans and animals. J Paediatr Child Health 1994;30:190-1. PubMed
  6. Barker SC and Altman PM. An ex vivo, assessor blind, randomised, parallel group, comparative efficacy trial of the ovicidal activity of three pediculicides after a single application--melaleuca oil and lavender oil, eucalyptus oil and lemon tea tree oil,
  7. Vilaplana, J. and Romaguera, C. Allergic contact dermatitis due to eucalyptol in an anti-inflammatory cream. Contact Dermatitis 2000;43(2):118.
  8. Juergens, U. R. [Reducing the need for cortisone. Does eucalyptus oil work in asthma? (interview by Brigitte Moreano]. MMW.Fortschr Med 3-29-2001;143(13):14.
  9. Tascini, C., Ferranti, S., Gemignani, G., Messina, F., and Menichetti, F. Clinical microbiological case: fever and headache in a heavy consumer of eucalyptus extract. Clin Microbiol.Infect. 2002;8(7):437, 445-437, 446. PubMed
  10. Galdi, E., Perfetti, L., Calcagno, G., Marcotulli, M. C., and Moscato, G. Exacerbation of asthma related to Eucalyptus pollens and to herb infusion containing Eucalyptus. Monaldi Arch.Chest Dis. 2003;59(3):220-221.
  11. Spoerke, D. G., Vandenberg, S. A., Smolinske, S. C., Kulig, K., and Rumack, B. H. Eucalyptus oil: 14 cases of exposure. Vet Hum.Toxicol 1989;31(2):166-168.
  12. Jori, A., Bianchetti, A., Prestini, P. E., and Gerattini, S. Effect of eucalyptol (1,8-cineole) on the metabolism of other drugs in rats and in man. Eur.J Pharmacol 1970;9(3):362-366. PubMed
  13. Tibballs, J. Clinical effects and management of eucalyptus oil ingestion in infants and young children. Med J Aust 8-21-1995;163(4):177-180. PubMed
  14. Webb, N. J. and Pitt, W. R. Eucalyptus oil poisoning in childhood: 41 cases in south-east Queensland. J Paediatr.Child Health 1993;29(5):368-371. PubMed
  15. Gyldenløve M, Menné T, Thyssen JP. Eucalyptus contact allergy. Contact Dermatitis. 2014;71(5):303-304. PubMed
  16. Higgins C, Palmer A, Nixon R. Eucalyptus oil: contact allergy and safety. Contact Dermatitis. 2015;72(5):344-346. PubMed
  17. de Groot AC, Schmidt E. Eucalyptus oil and tea tree oil. Contact Dermatitis. 2015;73(6):381-386. PubMed
  18. Greive KA, Barnes TM. The efficacy of Australian essential oils for the treatment of head lice infestation in children: A randomised controlled trial. Australas J Dermatol. 2018;59(2):e99-e105. PubMed
  19. Paulsen E, Thormann H, Vestergaard L. Eucalyptus species as a cause of airborne allergic contact dermatitis. Contact Dermatitis. 2018;78(4):301-303.
  20. Mathew T, John SK, Kamath V, et al. Essential oil related seizures (EORS): A multi-center prospective study on essential oils and seizures in adults. Epilepsy Res. 2021;173:106626. PubMed
  21. Dudipala SC, Mandapuram P, Ch LK. Eucalyptus Oil-Induced Seizures in Children: Case Reports and Review of the Literature. J Neurosci Rural Pract 2021;12(1):112-115. PubMed
  22. Panda PK, Sharawat IK, Panda P, Dawman L, Kasinathan A. Clinico-laboratory characteristics and outcome of patients with eucalyptus oil-induced/provoked seizures: A case series and systematic review of the published patients. Trop Doct 2021;51(4):518-522. PubMed
  23. Sai Chandar D, Prashanthi M, Laxman Kumar C, Amith Kumar C. Eucalyptus Oil-Induced Seizures in Children: A Single-Center Prospective Study. Cureus 2021;13(3):e14109. PubMed

See these in context on the Eucalyptus monograph →

Myrtle 3 references
  1. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  2. Salmanian M, Shirbeigi L, Hashem-Dabaghian F, et al. The Effects of Myrtle (Myrtus communis) and Clindamycin Topical Solution in the Treatment of Mild to Moderate Acne Vulgaris: A Comparative Split-Face Study. J Pharmacopuncture 2020;23(4):220-229.
  3. Paknejad MS, Eftekhari K, Rahimi R, Vigeh M, Naghizadeh A, Karimi M. Myrtle (Myrtus communis L.) fruit syrup for gastroesophageal reflux disease in children: A double-blind randomized clinical trial. Phytother Res 2021;35(11):6369-6376.

See these in context on the Myrtle 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

Keep exploring
Supplement interaction checker › Check any supplement or product against your medications Drug–drug interactions › Check two or more of your medications against each other Browse medications A–Z › Every drug we've checked against herbs & supplements NDC & pricing lookup › Find a drug’s NDCs, packaging and costs Ask a pharmacist › Free, personal answer from our licensed team