[Personal experiences with phenoxybenzamine (Dibenzyran) in the treatment of functional disorders of bladder...

The influence of phenoxybenzamine on micturition was examined in 46 patients with functional bladder neck obstruction. Due to blockade of the alpha-adrenergic receptors at the bladder neck an increase of the maximal flow rate from a mean value of 13.6 to 24.6 ml s-1 was found during the treatment. In addition, there was a relaxation of the functional urethral length and a reduction of the maximal urethral closure pressure from 96.3 to 74.4 cm H2O. The most significant changes resulting from the application of Dibenzyran were observed in the neuropathic bladder with a reduction of the functional urethral length from 24.3 to 20.5 mm and a decrease of Pura max from 100.5 to 82.7 cm H2O. Furthermore, we achieved an increase of the maximal flow rate from 13.4 to 22.5 ml s-1.