Tormentil + ADO-Trastuzumab Emtansine
ADO-Trastuzumab Emtansine brand name: Kadcyla.
We found no known interaction between Tormentil and ADO-Trastuzumab Emtansine 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 two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.
Tormentil and ADO-Trastuzumab Emtansine
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 ADO-Trastuzumab Emtansine and Tormentil 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.
Worth understanding: our licensed dataset holds no drug-interaction record for Tormentil at all — not against ADO-Trastuzumab Emtansine, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.
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.
Tormentil safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
See Every Supplement That Interacts With ADO-Trastuzumab Emtansine
This page covers Tormentil only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the ADO-Trastuzumab Emtansine page lists 121 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate), Adrafinil (moderate) and African Wild Potato (moderate).
By severity: 2 major · 87 moderate · 32 minor.
From our pharmacist’s overview on the ADO-Trastuzumab Emtansine page
“If you're taking ado-trastuzumab emtansine (Kadcyla) for HER2-positive breast cancer, treat this list as one to check carefully, not casually. Every one of the 121 flagged ingredients affects the same enzyme, CYP3A4, which your body uses to clear part of this medicine.”
Reviewed by 2 · Jul 18, 2026
Where Tormentil and ADO-Trastuzumab Emtansine 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.
#911 of 1,452 supplements looked up here in the last 7 days
#105 of 2,830 medications looked up here in the last 7 days
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 Tormentil reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 27, 2026. The Tormentil and ADO-Trastuzumab Emtansine records this page draws on were last updated July 10, 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.
About Tormentil
What is Tormentil?
- Diarrhea
- Mouth and throat inflammation
- Mild digestive upset
- Sore throat (gargle)
- Minor wounds and skin irritation
Tormentil is a traditional herb whose root is rich in tannins and has long been used for diarrhea and as a mouth rinse for sore gums or throat. Some small studies suggest it may help shorten diarrhea, but overall evidence is limited and quality is low. Talk to your pharmacist or doctor before using it, and avoid it during pregnancy and breastfeeding because safety is not established.
Potentilla erecta · Rosaceae · Root and rhizome (underground stem) · Tincture, liquid extract, tea, capsules, mouth rinse
An interaction check asks whether these two react with each other — it does not ask whether Tormentil is a good idea for someone in your situation. Here is what our Tormentil record says about it on its own.
Tormentil: dosing
There is no official, standardized dose for tormentil, and products vary widely in strength. Tinctures, extracts, teas, and capsules will each have different recommended amounts.The safest approach is to follow the directions on the product label and not exceed them. If you are using it as a mouth rinse, do not swallow large amounts.
From our Tormentil monograph — the full record covers uses, side effects and every documented interaction.
About Ado-trastuzumab Emtansine Injection
What Is Ado-trastuzumab Emtansine Injection Used For?
Brand name: Kadcyla
Kadcyla (ado-trastuzumab emtansine) is used on its own to treat HER2-positive metastatic breast cancer in adults who have already received trastuzumab and a taxane chemotherapy, either together or separately. It is used when cancer has come back or spread, or when the disease returned within six months of finishing earlier treatment.
Kadcyla is also used as adjuvant (after-surgery) treatment for HER2-positive early breast cancer in patients who still had remaining cancer after completing neoadjuvant (pre-surgery) treatment with a taxane and trastuzumab. Patients must be tested for HER2 overexpression or gene amplification using an FDA-authorized test before starting Kadcyla.
Most-Reported Side Effects for ADO-Trastuzumab Emtansine
From FAERS, the FDA’s public side-effect reporting system (8,277 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Tormentil
Browse every other medication we’ve checked against Tormentil — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Tormentil against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Amlodipine ›
- Levothyroxine ›
- Methylphenidate ›
- Warfarin ›
- Abemaciclib ›
- Ivermectin ›
- Testosterone ›
- Sertraline ›
- Acetaminophen ›
- Losartan Potassium ›
- Aspirin ›
- Rosuvastatin ›
- Metoprolol ›
- Escitalopram ›
- Clopidogrel ›
- Rivaroxaban ›
- Atorvastatin ›
- Methamphetamine ›
- Tirzepatide ›
- Docusate ›
- Ibuprofen ›
- Warfarin Sodium ›
- Sumatriptan ›
- Isotretinoin ›
- Valacyclovir ›
- Tadalafil ›
- Hydroxyurea ›
- Amlodipine Besylate ›
- Prednisone ›
- Semaglutide ›
- Metformin ›
- Lisdexamfetamine ›
- Propranolol ›
- Amitriptyline ›
- Amphetamine ›
- Methotrexate ›
- Lisinopril ›
- Amoxicillin ›
- Bupropion ›
- Fluoxetine ›
- Doxycycline ›
- Bendamustine ›
- Levothyroxine, Liothyronine ›
- Pregabalin ›
- Azithromycin ›
- Acyclovir ›
- Lamotrigine ›
- Gabapentin ›
- Dextroamphetamine ›
- Naproxen ›
- Quetiapine ›
- Clonazepam ›
- Buspirone ›
- Omeprazole ›
- Duloxetine ›
- Acetaminophen, Codeine ›
- Letrozole ›
- Citalopram ›
- Methylene Blue ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Tormentil list.
Tormentil References
The 1 references that drive our Tormentil 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.
- Huber, R., Ditfurth, A. V., Amann, F., Guthlin, C., Rostock, M., Trittler, R., Kummerer, K., and Merfort, I. Tormentil for active ulcerative colitis: an open-label, dose-escalating study. J.Clin.Gastroenterol. 2007;41(9):834-838. PubMed
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.
Taking Tormentil and ADO-Trastuzumab Emtansine Together: Common Questions
Is it safe to take Tormentil with ADO-Trastuzumab Emtansine?
Do Tormentil and ADO-Trastuzumab Emtansine have any of the same side effects?
Does ADO-Trastuzumab Emtansine interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.