Boston Scientific Rezum™ Water Vapor Therapy

Water Vapor Therapy

At a Glance

  • Non-surgical therapy uses water vapor to shrink an enlarged prostate
  • Eliminates excess prostate tissue to improve urine flow
  • Most patients see symptom improvement within two weeks
  • Alternative to BPH medications and their potential side effects or loss of effectiveness over time

The Details

An enlarged prostate can squeeze the urethra, making it difficult to pass urine from the bladder. During each 9-second Rezūm treatment, steam is released into the prostate to shrink the excess tissue that is pressing on the urethra. As your body heals and the extra tissue is gone, the urethra opens and urine can flow freely.

Most patients begin to experience symptom relief within two weeks, and maximum benefit may be reached within three months.

Urologist Consult Required

To Find Out More


What to know about Boston Scientific Rezum™ Water Vapor Therapy

How it Works

Rezūm Therapy is typically performed right in your urologist’s office, or at an outpatient surgery facility and completed in one short appointment.

During each 9-second treatment, sterile water vapor is released throughout the targeted prostate tissue. When the steam contacts the prostate tissue, all the stored energy is released into the tissue. Your doctor will determine the number of treatments you need, based on the size of your prostate.

Over time, your body’s natural healing response absorbs the treated tissue, shrinking the prostate. With the extra tissue removed, the urethra opens, reducing BPH symptoms.

Who is it for?

Men experiencing the troubling urinary symptoms of BPH or the side effects or ineffectiveness of BPH medications over time.


Most patients begin to experience symptom relief in as soon as two weeks, and maximum benefit may occur within three months. Patient responses can and do vary.

Medical Chart

Rezum™ Water Vapor Therapy Side Effects

Potential risks include but are not limited to painful urination (dysuria), blood in the urine (hematuria), blood in the semen (hematospermia), decrease in ejaculatory volume, suspected urinary tract infection (UTI), and urinary frequency, retention or urgency. You should talk with your doctor about the benefits and risks before moving forward with any treatment option.

Good to Know

Waking up multiple times a night to use the bathroom could be a sign of an enlarged prostate, or benign prostatic hyperplasia (BPH). Learn how Rezūm Water Vapor Therapy could help.

Rezūm Your Sleep

Minimally invasive treatment for BPH

Interested in learning more about Rezūm Water Vapor Therapy? Visit to find a urologist trained on Rezūm therapy for BPH.


Other treatments for BPH

Other medications and products that can also be used to treat BPH.



Finasteride is the same active ingredient as Proscar® and Proscar and is used to treat hair loss or BPH in men.



Tamsulosin contains the same active ingredient found in Flomax®. Requires a prescription and is available in .4mg capsules.



Same active ingredient found in Cialis. Taken one hour prior to sexual activity. Effective for up to 36 hours.

Available in 5mg and 20mg tablets or lozenges, prescription required.

Boston Scientific GreenLight™ Laser Therapy

Boston Scientific GreenLight™ Laser Therapy

A laser used to rapidly heat & vaporize excess prostate tissue, providing a larger channel for urine to pass through. Removing the excess tissue rapidly restores natural urine flow in most patients.