Prostate brachytherapy may cause side effects, including:

  • Difficulty starting urination
  • Frequently feeling an urgent need to urinate
  • Feeling a burning sensation when urinating
  • Blood in urine
  • Needing to urinate at night
  • Not being able to empty your bladder completely
  • Narrowing of the tube that carries urine from your bladder to the outside of your body (urethra)
  • Erectile dysfunction
  • Bleeding from the rectum
  • Blood in stool
  • Diarrhea

Doctors may often use medications to reduce side effects of treatment. Side effects of prostate brachytherapy may become less noticeable over time.