Ceylon Leadwort - Tapentadol Interaction
Herbal: Ceylon Leadwort
Drug: Tapentadol
Brand names:
Nucynta, Nucynta ER

Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
Jun 08, 2025
Interaction Details
Tapentadol is classified as belonging to the following category: Cytochrome P450 2C9 (Cyp2C9) Substrates
Plumbagin, a constituent of Ceylon leadwort, has been shown to inhibit cytochrome P450 2C9 (CYP2C9) in vitro. So far, this interaction has not been reported in humans. Theoretically, Ceylon leadwort might increase the levels of drugs metabolized by CYP2C9. Drugs that are metabolized by CYP2C9 include celecoxib (Celebrex), diclofenac (Voltaren), fluvastatin (Lescol), glipizide (Glucotrol), ibuprofen (Advil, Motrin), irbesartan (Avapro), losartan (Cozaar), phenytoin (Dilantin), piroxicam (Feldene), tamoxifen (Nolvadex), tolbutamide (Tolinase), torsemide (Demadex), and S-warfarin (Coumadin).
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
- Chen A, Zhou X, Tang S, Liu M, Wang X. Evaluation of the inhibition potential of plumbagin against cytochrome P450 using LC-MS/MS and cocktail approach. Sci Rep. 2016 Jun 22;6:28482.
Tapentadol Overview
-
Tapentadol tablets are used to treat moderate to severe acute pain (pain that begins suddenly, has a specific cause, and is expected to go away when the cause of the pain is healed). Tapentadol extended-release tablets are used to treat severe neuropathic pain (pain caused by nerve damage) in people who have diabetes. Tapentadol extended-release tablets are only used to treat people who are expected to need medication around-the-clock to relieve pain that cannot be controlled by the use of other pain medications. Tapentadol is in a class of medications called opiate (narcotic) analgesics. It works by changing the way the brain and nervous system respond to pain.
Ceylon Leadwort - More Interactions
Ceylon Leadwort interacts with 1064 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. |
Return to the main supplement interaction checker page
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
Drug descriptions are provided by MedlinePlus.