Peppermint - Kadcyla (ADO-Trastuzumab Emtansine) Interaction
Herbal: Peppermint
Also Known As: Mentha x piperita, Black Peppermint, Brandy Mint, Extract of Peppermint, Field Mint, Herba Menthae, Huile de Menthe Poivrée, Lamb Mint, M. Balsamea Willd Extract, Menta Pepperita, Menta Piperita, Mentha Balsamea, Mentha Oil, Mentha Piperita Extract, Mentha Piperita Oil
Drug: ADO-Trastuzumab Emtansine
Brand names:
Kadcyla

Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 25, 2025
Interaction Details
ADO-Trastuzumab Emtansine is classified as belonging to the following category: Cytochrome P450 3A4 (Cyp3A4) Substrates
Theoretically, peppermint might increase the levels of CYP3A4 substrates.
Clinical research in healthy volunteers shows that a single dose of peppermint oil 600 mg inhibits CYP3A4 enzymes and increases the AUC of felodipine, a CYP3A4 substrate. However, in vitro research suggests that peppermint oil only inhibits CYP3A4 at very high concentrations.
Interaction Rating
Likelihood of Occurrence
PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
References
- Dresser GK, Wacher V, Wong S, et al. Evaluation of peppermint oil and ascorbyl palmitate as inhibitors of cytochrome P4503A4 activity in vitro and in vivo. Clin Pharmacol Ther 2002;72:247-55.
- 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
Peppermint Overview

ADO-Trastuzumab Emtansine Overview
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Ado-trastuzumab emtansine injection is used to treat a certain type of breast cancer that has spread to other parts of the body and has not improved or has worsened after treatment with other medications. Ado-trastuzumab emtansine is also used after surgery for a certain type of breast cancer in women who have had treatment with other chemotherapy medications before surgery, but there was still cancer remaining in the tissue removed during surgery. Ado-trastuzumab emtansine is in a class of medications called antibody-drug conjugates. It works by killing cancer cells.
Peppermint - More Interactions
Peppermint interacts with 774 drugs
Interaction Rating Key
These severity listings are for informational use only. Never start, stop or otherwise change your therapy before speaking with your provider.
Major | The combined use of these agents is strongly discouraged as serious side effects or other negative outcomes could occur. |
Moderate | Use cautiously under the care of a healthcare professional or avoid this combination. A significant interaction or negative outcome could occur. |
Minor | Be aware that there is a chance of an interaction. Watch for warning signs of a potential interaction. |
Unknown | No interactions have been reported or no interaction data is currently available. |
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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.
© 2021 Therapeutic Research Center, LLC
Drug descriptions are provided by MedlinePlus.