The Role of Prophylactic Tamsulosin (Flomax) in Patients Undergoing Prostate 125-I Seed Implants for Prostate Carcinoma: Final Report of a Double-Blind Placebo-Controlled Randomized Study

Reviewer: S. Jack Wei, MD
Abramson Cancer Center of the University of Pennsylvania
Ultima Vez Modificado: 22 de octubre del 2003

Share article


Presenter: Mohamed Elshaikh, MD
Presenter's Affiliation: Cleveland Clinic Foundation
Type of Session: Scientific

Background

    Urinary morbidity following radioactive seed implantation for prostate cancer is common. Alpha-blockers with or without steroids following prostate implantation have been used routinely to reduced these symptoms; however, there are no randomized trials examining the efficacy of this treatment. This trial was designed to determine the efficacy of prophylactic tamsulosin in reducing urinary signs and symptoms following prostate seed implantation.

Materials and Methods

  • Patients were eligible for this study if they were eligible for treatment of their prostate cancer with seed implants only.
  • Patients already receiving tamsulosin or other alpha-blockers were excluded from the study.
  • All patients received implantation with I-125 seeds using a peripheral loading technique and all patients received a CT scan 4 weeks after the implant to determine radiation dosimetry.
  • Baseline American Urologic Association (AUA) score for urinary symptoms were obtained on all patients.
  • Patients were randomized to: 1) tamsulosin (0.8 mg po qd) or 2) placebo.
  • All patients started either tamsulosin or placebo 4 days prior to the implantation to achieve steady-state levels of medication.
  • Following implantation, AUA scores were assessed every week for 8 weeks. Patients reached the primary endpoint and were censored from the study if they developed increased urinary symptoms, urinary retention, or chose to drop out from the study.

Results

  • 118 patients were entered into the study.
  • The median age was 64.5 years (range 44-82).
  • Median PSA was 6.1.
  • 85% of patients had a Gleason Score of 6 or 7.
  • 88% of patients were stage T1c.
  • >90% of patients had a prostate volume of <60cc.
  • There was no difference in the two treatment arms with regards to baseline AUA score, prostate volume, number of needles used, number of seeds used, total activity of the implant, or post-operative dosimetry.
  • With regards to the number of patients completing all 8 weeks of therapy, there was no difference between the two arms.
  • There was no difference between the two arms with regards to the number of patients stopping the study due to symptoms; however, there was a non-significant difference with regards to number of patients stopping due to urinary retention (16.7% for placebo vs. 10% for tamsulosin).
  • There was no difference in AUA score between the two groups until week 5, at which time, a signficant difference was seen in average AUA score (p=0.03).

Author's Conclusions

  • A dose of 0.8 mg qd of tamsulosin is safe for prophylaxis.
  • There is no difference in urinary retention rates with the addition of prophylactic tamsulosin; however, by week 5, there was a difference in urinary symptoms.
  • A current study is ongoing comparing the effectiveness of prophylactic tamsulosin and steroids compared to tamsulosin alone for patients undergoing prostate seed implants.

Clinical/Scientific Implications

    The findings of the current study indicate that there may be some symptomatic relief with addition of prophylactic alpha-blockers such as tamsulosin to prostate seed implants. This improvement in symptoms is quite modest, and the study does not compare the symptomatic relief achieved with prophylactic tamsulosin compared to the initiation of tamsulosin only for patients experiencing significant symptoms. Given the lack of benefit with regards to urinary retention in these patients, the use of prophylactic tamsulosin for all patients undergoin prostate seed implants cannot be recommended, despite the mild improvement in urinary symptoms seen in this study.

Oncolink's ASTRO Coverage made possible by an unrestricted Educational Grant from Siemens Medical Solutions.


News
Benefit of PSA Reduced by Loss of Quality-Adjusted Life-Years

Aug 16, 2012 - Although the European Randomized Study of Screening for Prostate Cancer has reported a 29 percent reduction in prostate-cancer mortality for men who undergo prostate-specific antigen screening, the benefit is attenuated by loss of quality-adjusted life-years due to post-diagnosis effects, according to a study published in the Aug. 16 issue of the New England Journal of Medicine.



I Wish You Knew

How cancer patients have changed my life

View More



Blogs and Web Chats

OncoLink Blogs give our readers a chance to react to and comment on key cancer news topics and provides a forum for OncoLink Experts and readers to share opinions and learn from each other.




OncoLink OncoPilot

Frente a un nuevo diagnóstico de cáncer o de cambiar el curso de su tratamiento actual? Deje que nuestro personal de enfermería cáncer que ayudan a pasar!

Más información