Drug & supplement interaction

Tansy + Salmeterol

Salmeterol brand name: Serevent.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Tansy and Salmeterol in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the label for Salmeterol states a food rule worth keeping to.

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Interaction report

Tansy and Salmeterol

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Salmeterol and Tansy in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Tansy safety at a glance

Tansy overall Avoid Tansy contains thujone, which can be poisonous, so internal use is generally discouraged.
Pregnancy Likely Unsafe When used orally or topically due to potential abortifacient, menstrual flow, and uterine stimulant effects. Read the full pregnancy detail
Breastfeeding Likely Unsafe When used orally due to thujone content. Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Salmeterol and Tansy? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Salmeterol

Interactions in our licensed database are recorded against drug classes, not just single drug names. Salmeterol is filed under 3 classifications — beta-adrenergic agonists, qt interval-prolonging drugs, cytochrome p450 3a4 (cyp3a4) substrates. Tansy has documented interactions with 1 drug class — the most serious being alcohol (ethanol) (major) — and none of Salmeterol’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Tansy Does Interact With Other Medications

Tansy has 1 major, known drug interaction in our database — Salmeterol isn’t one of them. If you take anything else, check it against the full list below.

Major 1 No known interaction 2,829 (incl. Salmeterol)
Taking anything else?

Check Another of Your Medications Against Tansy

Covers the 2,830 medications we’ve checked against Tansy. Pick one to open its full report.

What to actually watch for

What Tansy Itself Has Been Linked To

This is not an interaction — nothing below involves Salmeterol. It is the side-effect record for Tansy on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Tansy, this list is the first place to look. 4 entries are worth acting on rather than waiting out — marked below.

  • Fainting / Seizures Worth acting on Additional detail

    “Orally, varieties of tansy that contain the toxic constituent thujone have been reported to cause thujone toxicity. Neurologic symptoms include loss of consciousness, tremors, seizures, and vertigo (2,18,77012).”

    Tansy · Natural Medicines adverse-effect record, reported in epilepsy.

    3 sources cited
    1. 2. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
    2. 18. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
    3. 77012. McGuffin M and et al. American Herbal Products Association's Botanical Safety Handbook. 1997.
  • An irregular heartbeat / Liver problems Worth acting on Additional detail

    “There is limited reliable information available about the adverse effects of tansy. Orally, varieties of tansy that contain the toxic constituent thujone have been reported to cause thujone toxicity. Symptoms of thujone toxicity include rapid pulse, irregular heartbeat, tachypnea, severe gastroenteritis, vomiting, dilated pupils, hepatotoxicity, nephrotoxicity, and death (4,6,77012,77014,77015).”

    Tansy · Natural Medicines adverse-effect record, reported in dermatitis.

    6 sources cited
    1. 4. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
    2. 6. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
    3. 77012. McGuffin M and et al. American Herbal Products Association's Botanical Safety Handbook. 1997.
    4. 77014. The Review of Natural Products by Facts and Comparisons. 1999.
    5. 77015. Blumenthal, M and et al. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. 1998;
    6. 18. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  • Kidney problems Worth acting on Additional detail

    “Orally, varieties of tansy that contain the toxic constituent thujone have been reported to cause thujone toxicity, which can result in nephrotoxicity.”

    Tansy · Natural Medicines adverse-effect record, reported in drug-induced kidney damage.

    1 source cited
    1. 77015. Blumenthal, M and et al. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. 1998;
  • Bleeding or bruising Worth acting on Additional detail

    “Orally, large doses of tansy have been reported to induce abortion and uterine bleeding.”

    Tansy · Natural Medicines adverse-effect record, reported in abortion.

    1 source cited
    1. 77015. Blumenthal, M and et al. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. 1998;
  • Sun sensitivity Additional detail

    “Topically, atopic dermatitis has been reported from members of the Compositae family, of which tansy is a member. Photosensitivity, typically presenting as eczema, has also been reported from contact with members of the Compositae family.”

    Tansy · Natural Medicines adverse-effect record, reported in dermatitis.

    4 sources cited
    1. 46978. Guin, J. D. and Skidmore, G. Compositae dermatitis in childhood. Arch Dermatol. 1987;123(4):500-502. DOI
    2. 77007. Jovanovic, M., Poljacki, M., Duran, V., Vujanovic, L., Sente, R., and Stojanovic, S. Contact allergy to Compositae plants in patients with atopic dermatitis. Med Pregl. 2004;57(5-6):209-218. PubMed
    3. 77011. Mark, K. A., Brancaccio, R. R., Soter, N. A., and Cohen, D. E. Allergic contact and photoallergic contact dermatitis to plant and pesticide allergens. Arch Dermatol. 1999;135(1):67-70. PubMed
    4. 42856. Jovanovic, M. and Poljacki, M. [Compositae dermatitis]. Med Pregl. 2003;56(1-2):43-49. PubMed
  • A fast or pounding heartbeat Additional detail

    Recorded for Tansy in the same Natural Medicines adverse-effect record shown under An irregular heartbeat / Liver problems above.

  • Stomach pain Additional detail

    “Orally, varieties of tansy that contain the toxic constituent thujone have been reported to cause thujone toxicity. Gastrointestinal symptoms include severe gastroenteritis, vomiting, and abdominal pain.”

    Tansy · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    1 source cited
    1. 77012. McGuffin M and et al. American Herbal Products Association's Botanical Safety Handbook. 1997.
  • Dizziness Additional detail

    Recorded for Tansy in the same Natural Medicines adverse-effect record shown under Fainting / Seizures above.

Showing the 10 most notable of 12 recorded effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

Everything above comes from the Natural Medicines adverse-effect record for Tansy — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Salmeterol’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Salmeterol column appears here.

Special populations

Tansy in Pregnancy & Breastfeeding

Pregnancy Likely Unsafe

When used orally or topically due to potential abortifacient, menstrual flow, and uterine stimulant effects.

Lactation Likely Unsafe

When used orally due to thujone content.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

How to take them

Some Salmeterol Products Have a Food Rule — Tansy Should Not Break It

At least one FDA label for a product containing Salmeterol says to take it on an empty stomach. Most supplements — Tansy included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Salmeterol on its own and move Tansy to a meal later in the day.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Salmeterol products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

One inhalation of SEREVENT DISKUS at least 30 minutes before exercise has been shown to protect patients against EIB.

From the Dosage and Administration section of the FDA label we read for Salmeterol — where that label names a specific product, the instruction is that product's. See the Salmeterol drug page ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Salmeterol

This page covers Tansy only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Salmeterol page lists 141 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: American Hellebore (major), Arsenic (major), Cesium (major), Ephedra (major) and Grapefruit (major).

By severity: 7 major · 105 moderate · 29 minor.

From our pharmacist’s overview on the Salmeterol page

“Salmeterol (Serevent) is the long-acting inhaler taken twice daily for asthma or COPD, and its supplement list is one I would approach with real caution. Seven of the 141 ingredients on file rate major: grapefruit can raise salmeterol levels by blocking the enzyme that clears it, St.”

Reviewed by 2 · Jul 18, 2026

Open the Salmeterol interaction page

One more smart check

Taking Tansy as Part of a Dietary Supplement Product? Check It for Interactions

We hold 45 real supplement products containing Tansy, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Tansy. Even though Tansy itself has no known interaction with Salmeterol, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Tansy and Salmeterol Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Tansy
Steady interest

#954 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Salmeterol
Steady interest

#2,546 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Tansy reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Tansy and Salmeterol records this page draws on were last updated July 11, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Tansy

What is Tansy?

  • Intestinal worms and parasites
  • Digestive upset
  • Menstrual problems
  • Insect repellent
  • Skin and wound care (traditional)

Tansy is a traditional bitter herb that contains thujone, a compound that can be toxic in higher amounts. Because of real safety concerns and very limited modern evidence, most people should avoid taking tansy internally, and it should never be used during pregnancy.

Tanacetum vulgare · Asteraceae · Flowers, leaves, and essential oil · Tea, dried herb, tincture, essential oil

An interaction check asks whether these two react with each other — it does not ask whether Tansy is a good idea for someone in your situation. Here is what our Tansy record says about it on its own.

Tansy: dosing

There is no established safe or standardized dose of tansy. Never use the concentrated essential oil internally, and follow all product labels carefully. In most cases, a safer alternative is the better choice.

From our Tansy monograph — the full record covers uses, side effects and every documented interaction.

Read the full Tansy monograph & all interactions
Medication

About Salmeterol Oral Inhalation

What Is Salmeterol Oral Inhalation Used For?

Brand name: Serevent

Serevent Diskus (salmeterol inhalation powder) is used for three main purposes: treating asthma in patients aged 4 and older alongside an inhaled corticosteroid (ICS), preventing exercise-induced bronchospasm (EIB) in patients aged 4 and older, and providing long-term maintenance treatment of bronchospasm associated with COPD — including chronic bronchitis and emphysema — in adults.

Important: Serevent Diskus is not a rescue inhaler. It will not relieve a sudden asthma or COPD attack. For asthma, it must always be used together with an inhaled corticosteroid — using it alone for asthma is contraindicated due to a serious risk of asthma-related death.

See full Salmeterol Oral Inhalation drug information
Keep checking

Other Drugs & Tansy

Browse every other medication we’ve checked against Tansy — both the ones with a known interaction and the ones without. Select any drug for the full detail.

1Major
0Moderate
0Minor
2,828No known interaction
1 Major 2,828 No interaction
Major

1 interaction

No interaction 2,828 drugs checked — show the list

We also checked Tansy against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,828 medications checked with no known interaction — see the full Tansy list.

See the full Tansy interactions page
See every supplement checked against Salmeterol, ranked by severity
Evidence & sources

Tansy References

The 14 references that drive our Tansy monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Blumenthal M, ed. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. Trans. S. Klein. Boston, MA: American Botanical Council, 1998.
  2. Newall CA, Anderson LA, Philpson JD. Herbal Medicine: A Guide for Healthcare Professionals. London, UK: The Pharmaceutical Press, 1996.
  3. The Review of Natural Products by Facts and Comparisons. St. Louis, MO: Wolters Kluwer Co., 1999.
  4. Schulz V, Hansel R, Tyler VE. Rational Phytotherapy: A Physician's Guide to Herbal Medicine. Terry C. Telger, transl. 3rd ed. Berlin, GER: Springer, 1998.
  5. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  6. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  7. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  8. Jovanovic, M. and Poljacki, M. [Compositae dermatitis]. Med Pregl. 2003;56(1-2):43-49. PubMed
  9. Guin, J. D. and Skidmore, G. Compositae dermatitis in childhood. Arch Dermatol. 1987;123(4):500-502. DOI
  10. Jovanovic, M., Poljacki, M., Duran, V., Vujanovic, L., Sente, R., and Stojanovic, S. Contact allergy to Compositae plants in patients with atopic dermatitis. Med Pregl. 2004;57(5-6):209-218. PubMed
  11. Mark, K. A., Brancaccio, R. R., Soter, N. A., and Cohen, D. E. Allergic contact and photoallergic contact dermatitis to plant and pesticide allergens. Arch Dermatol. 1999;135(1):67-70. PubMed
  12. McGuffin M and et al. American Herbal Products Association's Botanical Safety Handbook. 1997.
  13. The Review of Natural Products by Facts and Comparisons. 1999.
  14. Blumenthal, M and et al. The Complete German Commission E Monographs: Therapeutic Guide to Herbal Medicines. 1998;

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Tansy and Salmeterol Together: Common Questions

Is it safe to take Tansy with Salmeterol?
We do not list a known interaction between Tansy and Salmeterol. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Should I take Tansy and Salmeterol at the same time of day?
At least one FDA label for a product containing Salmeterol says to take it on an empty stomach, and supplements are usually taken with a meal — so taking them together at breakfast is the easy mistake. Where that applies, keep Salmeterol on its own and move Tansy to a meal later in the day. Food instructions belong to the product rather than the ingredient, so check the directions on your own box. This is about absorption, not an interaction.
How was the Tansy and Salmeterol combination checked?
Interactions in our licensed database are recorded against drug classes. Salmeterol is filed under 3 classifications, and Tansy has documented interactions with 1 drug class — none of Salmeterol's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Tansy interact with any other medications?
Yes. Tansy has 1 documented drug interaction in our database — Salmeterol is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Salmeterol interact with any supplements?
Yes. Salmeterol has documented interactions with 141 supplements in our database — Tansy is not one of them. The Salmeterol interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Tansy monograph Uses, safety profile, and every drug interaction in one place Salmeterol Oral Inhalation drug information The full plain-English guide to this medication Salmeterol supplement interactions Every supplement checked against Salmeterol, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 14 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Salmeterol and Tansy?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.