Coleus - Dextromethorphan, Guaifenesin, Pseudoephedrine Interaction
Herbal: Coleus
Also Known As: 6beta, 17beta-acetoxy-8, 13-epoxy-1alpha, 9alpha-trihydroxylabd-14-en-11-one, Borforsin, Coleus, Colforsin, Colforsine, Forskohlii, Forskolin, Forskolina, Forskoline, Gandir, Garamar, HL-362, L-75-1362B, Makandi, Plectranthus barbatus
Drug: Dextromethorphan, Guaifenesin, Pseudoephedrine
Brand names:
Pseudovent DM, Profen Forte DM, Profen II DM, Med Rx DM, Protuss DM, Syn Rx DM, Maxifed DM, Medent DM, Panmist DM, Touro CC
Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 04, 2025
Interaction Details
Dextromethorphan, Guaifenesin, Pseudoephedrine is classified as belonging to the following category: Cytochrome P450 3A4 (Cyp3A4) Substrates
Theoretically, taking coleus might decrease serum levels of drugs metabolized by CYP3A4.
In vitro research shows that coleus can activate the nuclear receptor, pregnane X receptor (PXR), which results in increased expression of CYP3A4. Although the clinical significance of this is not known, use caution when considering concomitant use of coleus and other drugs affected by these enzymes.
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
- Ding, X. and Staudinger, J. L. Induction of drug metabolism by forskolin: the role of the pregnane X receptor and the protein kinase a signal transduction pathway. J Pharmacol Exp Ther 2005;312(2):849-856.
- Staudinger, J. L., Ding, X., and Lichti, K. Pregnane X receptor and natural products: beyond drug-drug interactions. Expert.Opin Drug Metab Toxicol 2006;2(6):847-857.
Coleus Overview
Coleus is a type of flowering plant that belongs to the Lamiaceae family. It is native to tropical regions of Asia and Africa. When used as a natural medicine, it is generally the chemical compound 'forskolin', which is extracted from the roots of the plant, that is used. It has been traditionally used to treat a variety of conditions, including high blood pressure, asthma, exercise improvement, and heart disease.
Coleus - More Interactions
Coleus interacts with 892 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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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.
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