Amitriptyline for Bladder Pain Syndrome
Evidence-Based Rationale
- The American Urological Association recommends amitriptyline for IC/BPS with Grade B evidence strength, showing superiority over placebo for symptom improvement 1, 2, 3
- Nortriptyline has no published evidence for bladder pain syndrome treatment and is not mentioned in any IC/BPS guidelines or research studies 1, 2, 3
Practical Dosing Algorithm for Amitriptyline in IC/BPS
- The American Urological Association suggests beginning amitriptyline at 10 mg nightly at bedtime to minimize side effects 1, 2, 3
- Increase amitriptyline by 10-25 mg every 3-7 days as tolerated, with a target dose of 50-75 mg daily 1, 2, 3
Critical Safety Considerations
- The American Heart Association recommends obtaining screening ECG in patients >40 years before initiating amitriptyline therapy 4
- Limit amitriptyline doses to <100 mg/day in patients with any cardiac risk factors 7
Common Adverse Effects
- Sedation, dry mouth, orthostatic hypotension, constipation, urinary retention, and nausea are frequent but generally not life-threatening side effects of amitriptyline 1, 2, 3
Multimodal Treatment Approach
- The American Urological Association recommends combining pharmacologic agents with behavioral modifications and other therapies for IC/BPS treatment 1, 2, 3