Cesium - Raxar (Grepafloxacin) Interaction
Herbal: Cesium
Drug: Grepafloxacin
Brand names:
Raxar

Medical Content Editor Dr. Brian Staiger, PharmD
Last updated
May 04, 2025
Interaction Details
Grepafloxacin is classified as belonging to the following category: Qt Interval-Prolonging Drugs
Theoretically, taking cesium concomitantly with other drugs that prolong the QT interval may increase the risk of ventricular arrhythmias and death.
Taking cesium can prolong the QT interval on electrocardiogram (ECG). In many cases, cesium-induced QT prolongation has led to serious adverse effects, including torsades de pointes, cardiac arrest, and death.
Interaction Rating
Likelihood of Occurrence
ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
References
- Lyon AW, Mayhew WJ. Cesium toxicity: A case of self-treatment by alternate therapy gone awry. Ther Drug Monit 2003;25:114-6.
- Vyas H, Johnson K, Houlihan R, et al. Acquired long QT syndrome secondary to cesium chloride supplement. J Altern Complement Med 2006;12:1011-4.
- Pinter A, Dorian P, Newman D. Cesium-induced torsades de pointes. N Engl J Med 2002;346:383-4.
- O'Brien CE, Harik N, James LP, et al. Cesium-induced QT-interval prolongation in an adolescent. Pharmacotherapy 2008;28:1059-65.
- FDA alerts health care professionals of significant safety risks associated with cesium chloride. FDA: Human Drug Compounding. July 23,2018. Available at: https://www.fda.gov/drugs/human-drug-compounding/fda-alerts-health-care-professionals-significant-sa
- Public Health Alert Concerning Dietary Supplements Containing Cesium Salts. FDA Dietary Supplement Products & Ingredients. February 5, 2020. Available at: https://www.fda.gov/food/dietary-supplement-products-ingredients/public-health-alert-concerning-diet
Cesium - More Interactions
Cesium interacts with 251 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.
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Drug descriptions are provided by MedlinePlus.