Bristol Urological Institute, Southmead Hospital, Westbury on Trym, Bristol, UK

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Overactive bladder (OAB) is a bothersome condition that affects millions of people worldwide. It consists of urgency, incontinence, frequency and nocturia. Treatment, in the form of lifestyle interventions, bladder training and pelvic floor muscle exercises, aim to alleviate symptoms. These treatment modalities have drawbacks, including being time consuming and require stamina on the part of the patient and treating physician. Drugs may be used if conservative measures fail or in combination with them. Antimuscarinics are the mainstay of OAB medication but may cause dry mouth, blurred vision or constipation. It is, therefore, crucial that new treatment modalities are sought to help with this potentially debilitating condition. Antidiuresis, using desmopressin, forms a potential candidate for a novel treatment. As the bladder fills with urine, symptoms of OAB are experienced by patients. It would be reasonable to hypothesise that if the rate of bladder filling is reduced then so would the symptoms of OAB. Desmopressin reduces the production of urine by the kidneys, therefore reducing the amount of urine in the bladder and, therefore, the symptoms of OAB. Desmopressin has been used previously in small single centre trials in neurogenic OAB patients with some success but recently two multi-centre, multinational randomised placebo controlled trials using this concept have been completed in idiopathic OAB sufferers and reported in the literature. The results were quite promising although there were minor side effects. These trials suggest that this potential novel treatment modality for OAB sufferers might avoid the necessity for invasive treatments, such as botulinum toxin, neuromodulation or surgery, in some instances. These trials also open the way to combination therapy with current treatment modalities of OAB.

Written by
Hashim H, Abrams P.

Reference
Int J Clin Pract Suppl. 2007 Sep;(155):32-6

PubMed Abstract
PMID:17727577

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