Interactions Between Natural Products and Cancer Treatments: Underlying Mechanisms and Clinical Importance
Overview
Affiliations
Natural products, also referred to as dietary supplements, complementary and alternative medicines, and health or food supplements are widely used by people living with cancer. These products are predominantly self-selected and taken concurrently with cancer treatments with the intention of improving quality of life, immune function and reducing cancer symptoms and treatment side effects. Concerns have been raised that concurrent use may lead to interactions resulting in adverse effects and unintended treatment outcomes. This review provides an overview of the mechanisms by which these interactions can occur and the current evidence about specific clinically important natural product-drug interactions. Clinical studies investigating pharmacokinetic interactions provide evidence that negative treatment outcomes may occur when Hypericum perforatum, Grapefruit, Schisandra sphenanthera, Curcuma longa or Hydrastis canadensis are taken concurrently with common cancer treatments. Conversely, pharmacodynamic interactions between Hangeshashinto (TJ-14) and some cancer treatments have been shown to reduce the side effects of diarrhoea and oral mucositis. In summary, research in this area is limited and requires further investigation.
Marati K, Palatheeya S, Chettupalli A, Bukke S BMC Pharmacol Toxicol. 2025; 26(1):7.
PMID: 39810264 PMC: 11730522. DOI: 10.1186/s40360-025-00836-z.
Epimesatines P-S: Four Undescribed Flavonoids from Maxim. and Their Cytotoxicity Activities.
Xie S, Yu X, Zhang J, Hao Z, Zheng X, Feng W Molecules. 2024; 29(19).
PMID: 39407639 PMC: 11477557. DOI: 10.3390/molecules29194711.
Choi S, Karki Kunwor S, Im H, Choi D, Hwang J, Ahmed M Cancers (Basel). 2024; 16(18).
PMID: 39335102 PMC: 11429845. DOI: 10.3390/cancers16183130.
Wang J, Wang L, Zhang Y, Pan S, Lin Y, Wu J Molecules. 2024; 29(17).
PMID: 39274913 PMC: 11396751. DOI: 10.3390/molecules29174066.
Wode K, Kienle G, Bjor O, Fransson P, Sharp L, Elander N Dtsch Arztebl Int. 2024; 121(11):347-354.
PMID: 38915151 PMC: 11539882. DOI: 10.3238/arztebl.m2024.0080.