Pentosan Polysulfate Sodium (Elmiron): Basics

Pentosan polysulfate sodium works like an anticoagulant (blood thinner) that prevents the formation of blood clots. However, it is used to treat bladder pain and discomfort caused by cystitis (bladder inflammation or irritation).


Side Effect

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • nosebleed;
  • blood in your urine or stools;
  • rectal bleeding;
  • coughing up blood;
  • bleeding gums; or
  • feeling like you might pass out.

Less serious side effects may include:

  • hair loss;
  • nausea, diarrhea, stomach pain;
  • headache;
  • mild dizziness;
  • depressed mood; or
  • mild itching or skin rash.


Keywords: pentosan polysulfate sodium; elmiron.

* The Content is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition.