A prospective, randomized, placebo controlled, double-blind study of amitriptyline for the treatment of interstitial cystitis

The Journal of Urology
Arndt van OphovenL Hertle

Abstract

We conducted a prospective study to examine the safety and efficacy of the tricyclic antidepressant amitriptyline in patients with interstitial cystitis (IC). The study comprised 44 women and 6 men who all met the symptom criteria of the National Institute of Diabetes, Digestive and Kidney Diseases for IC. The patients were randomly assigned to amitriptyline or placebo. Patients were prospectively treated for 4 months with a self-titration protocol that allowed them to escalate drug dosage in 25 mg increments in 1 week-intervals (maximum dosage 100 mg). The change from baseline in the O'Leary-Sant IC symptom and problem index was the primary outcome parameter. Changes in functional bladder capacity and frequency (48-hour voiding log), and intensity of pain and urgency (visual analog scales) were chosen as secondary outcome parameters. Two patients (1 on amitriptyline, 1 on placebo) dropped out of the study due to side effects. Thus, the data of 48 patients (24 patients in each group) were available for evaluation. Mean symptom score decreased from 26.9 to 18.5 in the amitriptyline group compared with 27.6 to 24.1 in the placebo group (p = 0.005). Pain and urgency intensity improved statistically significantly in the amitriptyli...Continue Reading

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