Treatment of Bladder Pain Syndrome When Amitriptyline and Pentosane Polysulphate Have Not Controlled Pain and Urinary Frequency
This protocol applies when a structured first-line oral regimen has not achieved the target reduction in bladder pain severity and urinary frequency, and a next-line approach is required.
Clinical Scenario
Persistent or recurrent pain perceived in the urinary bladder region, accompanied by at least one additional symptom — pain worsening with bladder filling or increased daytime and/or night-time urinary frequency — with no proven infection or other obvious local pathology, and pain present for at least 3 months.
Previous Treatment — Targets Not Met at 6 Weeks
The preceding approach included amitriptyline (oral, at night, titrated against benefit and side effects) combined with pentosane polysulphate and dietary advice, with subcutaneous heparin added for low responders to pentosane polysulphate alone.
That line aimed to achieve reduction in urinary bladder pain severity and reduction in urinary frequency at 6 weeks. Where those targets are not met, this protocol defines the next step.
Next-Line Approach (Partial Overview)
Management at this stage centres on intravesical instillation therapy — treatment delivered directly into the bladder. Several distinct instillation options are addressed in the protocol, each with its own indication and sequencing within the algorithm.
The complete protocol specifies which agents apply, the selection criteria, and how clinical response is assessed — access it below.
Goal: Reduction in urinary bladder pain severity and improvement in bladder symptom scores at 1 month.
References
- Primary bladder pain syndrome is the occurrence of persistent or recurrent pain perceived in the urinary bladder region, accompanied by at least one other symptom, such as pain worsening with bladder filling and daytime and/or night-time urinary frequency.
- There is no proven infection or other obvious local pathology.
- Offer intravesical lidocaine plus sodium bicarbonate prior to more invasive methods.
- Offer intravesical hyaluronic acid or chondroitin sulphate before more invasive measures.
- Offer intravesical heparin before more invasive measures alone or in combination treatment.
- Intravesical instillation of alkalised lidocaine or placebo for five consecutive days resulted in significantly sustained symptom relief for up to one month.
- Primary bladder pain syndrome patients were treated with heparin for three months, and over half had control of symptoms, with continued improvement after one year of therapy.
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