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Related Experiment Videos

Treating the human bladder with capsaicin: is it safe?

P Dasgupta1, V Chandiramani, M C Parkinson

  • 1Uro-Neurology Department, Institute of Neurology, UCL Hospitals Trust, London, UK.

European Urology
|February 21, 1998
PubMed
Summary

Repeated intravesical capsaicin treatments for overactive bladder showed no signs of bladder cancer in patient biopsies. Further surveillance is ongoing due to the long-term effects of chemical carcinogens.

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Area of Science:

  • Urology
  • Oncology
  • Pharmacology

Background:

  • Capsaicin, derived from chili peppers, has a long history of human use.
  • Concerns exist regarding capsaicin's potential carcinogenicity, particularly its long-term effects on bladder tissue.
  • This study addresses the uncertainty surrounding capsaicin's status as a possible carcinogen.

Purpose of the Study:

  • To evaluate the safety of repeated intravesical capsaicin instillations in patients with detrusor hyperreflexia.
  • To assess for any pre-malignant or malignant changes in bladder biopsies following capsaicin treatment.
  • To contribute to understanding the long-term effects of capsaicin on the bladder.

Main Methods:

  • A cohort of 20 patients with intractable detrusor hyperreflexia received repeated intravesical capsaicin (1-2 mmol/l) between 1991 and 1996.

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  • Patients underwent surveillance including flexible cystoscopy and bladder biopsies before and after capsaicin treatment.
  • Biopsies were analyzed using light microscopy after hematoxylin-eosin staining.

    • Main Results:

    • No instances of metaplasia, dysplasia, or carcinoma in situ were observed in the bladder biopsies.
    • No papillary or solid invasive bladder cancer was detected in any of the patient samples.
    • The study found no evidence of pre-malignant or malignant changes directly attributable to capsaicin treatment.

    Conclusions:

    • Repeated intravesical capsaicin treatment for up to 5 years did not result in detectable pre-malignant or malignant changes in bladder biopsies.
    • While short-term results are reassuring, the potential for delayed morphological effects of chemical carcinogens necessitates continued long-term surveillance.
    • Further monitoring is recommended to fully ascertain the long-term safety profile of intravesical capsaicin.