Enhancement of detrusor reflex activity by naloxone in patients with chronic neurogenic bladder dysfunction. Preliminary report.

An intravenous injection of 0.4 mg. naloxone enhanced detrusor reflex activity in 5 patients with chronic neurogenic bladder dysfunction caused by incomplete suprasacral spinal lesions. The intravesical volume at which detrusor reflex occurred showed a decrease from 498.2 to 346.2 ml. The naloxone-induced effect was short-lived, being absent 1 hour after the injection. In the same dosage naloxone did not induce detrusor reflex in 2 patients with areflexic bladder caused by complete suprasacral spinal lesions.