Cinchona - Bystolic (Nebivolol) Interaction
Herbal: Cinchona
Also Known As: Cinchona calisaya, Arbol de la Quina, Bois aux Fièvres, Calisaya Bark, Cascarilla, China Bark, Chinarinde, Chinarindenbaum, Chininbaum, Cinchonine, Écorce du Pérou, Écorce de Quina, Écorce de Quinquina Rouge, Fever Tree, Fieberrinde, Fieberrindenbaum, Jesuit's Bark
Drug: Nebivolol
Brand names:
Bystolic, Nebilet
Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 18, 2025
Interaction Details
Nebivolol is classified as belonging to the following category: Cytochrome P450 2D6 (Cyp2D6) Substrates
Theoretically, taking cinchona might inhibit cytochrome P450 2D6 (CYP2D6) and increase levels of drugs metabolized by this enzyme.
Quinidine, a constituent of cinchona, inhibits CYP2D6-mediated metabolism in humans.
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
- Hansten PD, Horn JR. Drug Interactions Analysis and Management. Vancouver, WA: Applied Therapeutics Inc., 1997 and updates.
- Bramer SL, Suri A. Inhibition of CYP2D6 by quinidine and its effects on the metabolism of cilostazol. Clin Pharmacokinet. 1999;37 Suppl 2:41-51.
Cinchona Overview
Cinchona is a genus of flowering plants belonging to the Rubiaceae family. It contains around 25 different species and is native to the Andes mountains of South America. One of the most well-known species is Cinchona calisaya. The bark of cinchona is a source of quinine, an alkaloid that has been used for centuries to treat malaria. Cinchona bark is also used in traditional medicine for a variety of other ailments, including muscle cramps, restless legs, fever, arthritis, and digestive disorders. As Cinchona contains quinine, it is sometimes used as a flavoring on tonic water and alcoholic drinks. Cinchona bark has been shown to contain, on average, 5% to 15% quinoline alkaloids.
Nebivolol Overview
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Nebivolol is used alone or in combination with other medications to treat high blood pressure. Nebivolol is in a class of medications called beta blockers. It works by relaxing blood vessels and slowing heart rate to improve blood flow and decrease blood pressure.
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High blood pressure is a common condition and when not treated, can cause damage to the brain, heart, blood vessels, kidneys and other parts of the body. Damage to these organs may cause heart disease, a heart attack, heart failure, stroke, kidney failure, loss of vision, and other problems. In addition to taking medication, making lifestyle changes will also help to control your blood pressure. These changes include eating a diet that is low in fat and salt, maintaining a healthy weight, exercising at least 30 minutes most days, not smoking, and using alcohol in moderation.
Cinchona - More Interactions
Cinchona interacts with 485 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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In addition to being a clinical pharmacist specializing in pharmacotherapy, Dr. Brian Staiger is a registered herbalist through the American Herbalist Guild. He has combined his passion for pharmacy practice with the study of medical ethnobotany to improve patient care. Feel free to reach out about any of your herbal or medication questions!
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