Skip to Accessibility Tools Skip to Content Skip to Footer
What to Expect: BCG Treatment

Before, During & After BCG: What to Expect

What is BCG?

Bacillus Calmette-Guérin (BCG) is an immunotherapy used to treat bladder cancer. BCG treatment is made from a bacterium and is also used as a vaccine for tuberculosis.1,2 It is known as a “live” vaccine, which means it is a very weakened version of the original bacteria. BCG is placed in the bladder through a catheter and triggers the body’s immune system to stop or slow the growth of cancer cells. BCG causes inflammation in the bladder, which is a sign that the immune system is fighting off the cancer.

BCG is a fairly noninvasive treatment; patients come in to a doctor’s office to receive the treatment and are able to go home the same day. BCG is usually given once a week for 6 weeks following another common bladder cancer treatment: the transurethral resection of bladder tumor (TURBT) procedure. BCG can also be given as a maintenance therapy over a period of up to 3 years.

Any new treatment or procedure can be confusing and scary. Knowing what to expect can hopefully help to reduce anxiety.

Before a BCG treatment

Your doctor will give you a set of instructions before your BCG treatment to help you prepare for the procedure.1 In general, patients are usually told to limit their fluid intake for 6 hours before treatment. Drinking less will ensure that less urine is produced, and this will prevent the BCG treatment from being diluted in the bladder. Patients may also be asked to pass urine right before the procedure to make sure the bladder is empty. You should be able to eat as you normally would before your BCG treatment, but always check with your doctor for specific instructions.

Your doctor may also give you additional guidelines that cover:

  • Taking medications
  • Pregnant or breast feeding mothers
  • Flu or flu shot, shingles or TB
  • Bleeding conditions

During a BCG treatment

During the procedure, a catheter is placed in the urinary bladder through the urethra. A local numbing medication, often a gel, may be used for the catheter insertion.1,2 It is generally not considered a painful procedure, though some may find it uncomfortable. Any urine remaining in the bladder will be drained and then a BCG solution will be inserted into the bladder next to the tumor and should remain for two hours. The catheter is normally removed after the BCG is placed into the bladder, and patients can get up and walk around during the waiting time. If the catheter is not removed for some reason, it is clamped to keep the BCG in the bladder. Patients are asked not to urinate for the two hours waiting time. Most people can travel independently to the doctor for the procedure, but it may be helpful to have another person accompany you to help pass the time.

After a BCG treatment

After the BCG has been in the bladder for two hours, patients who have had the catheter removed are asked to urinate.1,2 Those who have had the catheter remain inserted during the waiting time will have the BCG drained before the catheter is removed. After the BCG is drained from the bladder, patients can resume drinking fluids normally.

Because BCG is a live vaccine, there are some important safety measures to keep in mind that your doctor can explain. BCG can remain in urine for 6 hours after your treatment, so each time after you urinate, you should bleach the toilet in your home to neutralize the vaccine. If you are using a shared bathroom, you should make sure that no one uses the toilet directly after you until the bleach can take effect. It’s important to be mindful of small children and make sure you communicate with the members of your household about your treatment. Hand-washing and hygiene is important during your treatment and your doctor will provide specific safety instructions for after your treatment. Additionally, your doctor may advise you to refrain from oral sex or sexual intercourse for a few days after each BCG treatment. If you have any questions, make sure to ask your doctor.

BCG maintenance therapy

After the initial course of BCG treatment, it may be used again as a maintenance therapy.1,2 Maintenance therapy is used to prevent bladder cancer from recurring and has been shown to reduce the frequency of recurrence and progression of bladder cancer. Treatment protocol intervals may vary, so patients could receive additional BCG treatments every 1, 3 or 6 months over a period of 1 to 3 years.

What are the side effects of BCG?

Some patients have difficulty completing long-term BCG therapy because of irritation in the bladder.2 To help with this irritation, the treatment frequency may be adjusted to give you a longer break between treatments. You may not notice any reaction after the first few BCG treatments. After the third treatment, patients usually start to experience bladder irritation, pain or burning during urination, joint pain, fatigue, and flu-like symptoms that can last a few days. Most symptoms and side effects can be treated with over-the-counter pain medicines.

While BCG is a fairly common treatment for bladder cancer, every person has different experiences. It’s important to talk to your doctor about any questions or concerns you may have at any point during your treatment. Being mentally prepared for what to expect can help to reduce stress or uncertainty about treatment or help you think of additional questions for your healthcare team.

  1. Patient Information: Guide to Bladder Cancer- BCG treatment. Department of Urology, Bwrrd lechyd Prifysgol Aneurin Bevan University Health Board website. Wales. Published March, 2014 Accessed online September 29, 2017.
  2. Steinberg, D. Bacillus Calmette-Guérin Immunotherapy for Bladder Cancer Overview of BCG Immunotherapy. Medscape website. Published January 14, 2017. Accessed online September 28, 2017.


  • Sophie
    4 months ago

    I had BCG treatments for bladder cancer 18 months ago. I only had 3 of the 6 treatments as I was unable to tolerate them. Forty minutes into the treatment I was in intense pain and couldn’t hold the BCG in for any longer. My urologist also did TURBT and one chemo treatment while under general anaesthetic. The tumour kept coming back and I ended up having to have a cystectomy. They think I may have also had interstitial cystitis which was the reason for the intense pain during BCG treatment. Since having the cystectomy I am now cancer free, have no more pain and the quality of my life has improved tremendously.

  • Sarah Wallin moderator
    4 months ago

    Hi @sophie, thank you for sharing your experience with BCG, I can’t imagine how painful that must have been. I’m glad to hear you are no longer having pain and have an improved quality of life after your cystectomy. Take care, Sarah ( Team Member)

  • Marvin
    9 months ago

    I have had the full couse of 6 BCG treatments with the last treatment in Nov, 2018. I was really anxious before the first treatment. My anxiety was soon gone after the insertion of the catheter. The treatment was painless, not even uncomfortable. The following treatments were routine. Following treatment I experienced no pain or other symptoms in the bladder. Guess I tolerated treatments well. Underwent a cystoscopy approx 3 months later and Dr. found no recurrence of cancer. All treatments were conducted under local anesthesia. No need for general. I am about to receive 3 maintenance treatments. Will let you know how they went.

  • Sarah Wallin moderator
    9 months ago

    Hi @marvin, Anxiety before treatments is a pretty common experience among the community. I’m glad that your first round of treatments had minimal pain and other symptoms! I’m linking you to another article about BCG that may be of interest ( Congrats on your positive cystoscopy report 🙂 Looking forward to hearing updates on how your next 3 maintenance treatments are going. Best of luck, and keep in touch. -Sarah ( Team Member)

  • Senchen
    12 months ago

    Before inserting the catheter, a numbing agent (in my case Lidocaine jelly) was injected into my urethra. In my opinion, it is no worse than having a digital prostate exam….a little uncomfortable but tolerable. When the catheter reached my prostate, my urologist asked me to take a deep breath then exhale, catheter was then in my bladder.
    I had to undergo 6 BCG treatments (one per week), then have a cystoscopy performed every 3 months for a year.

  • Sarah Wallin moderator
    12 months ago

    Hi @senchen, your experience sounds similar to some others we’ve heard here. I’m glad that this process was not painful for you and that your urologist worked with you to insert the catheter while taking a deep breath. The community often discusses various experiences with BCG, and we’re glad you shared yours. You’ll find some additional discussion and perspectives here ( While having the 6 treatments did you ever feel pain afterwards? We had one community member, @degrebes , who asked about some techniques to reduce pain ( Maybe you can leave a comment if you have something to say. Thanks for being here! -Sarah ( Team Member)

  • todd
    1 year ago

    Can the doctors give anesthesia for the bcg treatment procedure? I am very nervous.

  • Nina moderator
    1 year ago

    Hi @todd, as bcg involves inserting a catheter, I’m not sure if they would use any general anesthesia. It’s certainly worth asking the doc if it would help with peace of mind! This article talks about BCG: and this recent question asked about pain afterwards: Most importantly, know it’s completely normal to be nervous, and reach out whenever you need. – Nina, Team

  • Poll