Botulinum Toxin for Anismus
Anismus is a condition in which the muscles in the pelvic floor do not relax, preventing normal co-ordination of bowel opening. If other treatments have failed, your surgeon may recommend an injection of botulinum toxin into the puborectalis muscle of the pelvic floor.
HOW DOES IT WORK?
Botulinum toxin causes relaxation in the muscle. This last for 2-3 months. When injected into the puborectalis muscle in patients suffering from anismus, it can allow the pelvic floor to relax and normal bowel function to be regained.
HOW EFFECTIVE IS THIS TREATMENT?
Up to 50% of patients with anismus have reported improved symptoms after this procedure. However, more research is needed in this area.
It can be effective for up the twelve weeks, after which the injection can be repeated. The second injection usually lasts longer and may be permanent.
HOW DO I PREPARE FOR THE TREATMENT?
There is no special preparation for this procedure if you are having it done in clinic. You can eat and drink normally before your appointment. Sometimes botulinum toxin is injected under general anaesthetic. In this case, you will prepare as for any other operation. The hospital will guide you through this.
WHAT HAPPENS DURING THE PROCEDURE?
This treatment is usually carried out at a clinic appointment.
You will be asked to lie on your tummy or side on a couch, and will be given a local anaesthetic injection into the anal region to numb sensation. The botulinum injection is then quick and painless.
WHAT HAPPENS AFTER THE TREATMENT?
Your bottom may feel uncomfortable for a day or so after the local anaesethetic wears off. Most patients are able to resume normal activities within 24 hours.
There is a small risk of bleeding, bruising or infection.
Please be advised that the information on this website is not a substitute for professional medical advice, diagnosis or treatment