Zusammenfassung
Die Prävalenz von Harninkontinenz ist bei beiden Geschlechtern hoch. Frauen sind häufiger von einer Stress- und Männer häufiger von einer Dranginkontinenz betroffen, andere Inkontinenzarten sind demgegenüber selten. Pathophysiologisch liegt bei Stressinkontinenz ein insuffizienter Harnröhrenverschluss und bei Dranginkontinenz unwillkürliche Detrusorkontraktionen vor. Medikamente sind ein Teil im Gesamtkonzept der Inkontinenztherapie. Bei Stressinkontinenz ist es mit dem neuen Wirkstoff Duloxetin, einem Serotonin- und Noradrenalinwiederaufnahmehemmer, möglich, den urethralen Verschlussdruck zu erhöhen und Inkontinenzepisoden um bis zu 64% zu reduzieren. Bei Dranginkontinenz bewirken Muskarinrezeptorantagonisten eine Relaxierung des Detrusors, was eine signifikante Abnahme der Miktionsfrequenz und Inkontinenzepisoden sowie eine Zunahme der Blasenkapazität zur Folge hat. Trospiumchlorid, Tolterodin, Solifenacin, Oxybutynin und Propiverin sind in Deutschland zugelassene antimuskarinerge Medikamente. Bei geringen Unterschieden in der Effektivität weisen diese Medikamente z. T. große Unterschiede bei Nebenwirkungen auf. Mundtrockenheit ist häufig ein therapielimitierender Faktor. Keines der zugelassenen Medikamente hat allerdings bei allen Patienten eine ausreichende Wirkung, weshalb sich zurzeit neue Medikamente mit anderen Wirkmechanismen in der Erprobung befinden.
Abstract
Urinary incontinence has a high prevalence in both men and women. Women suffer predominantly from stress urinary incontinence and men from urge incontinence. Other types of incontinence are less frequent. Stress urinary incontinence is caused by an insufficient urethral closure mechanism and urge incontinence by unhibited detrusor contractions. Medical treatment is beside other conservative options and operations only one part of the treatment strategy in incontinence. Duloxetine, a serotonine-norepinephrine reuptake inhibitor, is used to treat stress urinary incontinence, can increase activity of the external urethral sphincter and is able to reduce incontinence episodes in up to 64%. Antagonists of muscarinic receptors can reduce urgency, frequency and urge incontinence as well as increase bladder capacity significantly. In Germany, trospium chloride, tolterodine, solifenacin, oxybutynin and propiverine are available to treat urge incontinence. Efficacy of these agents are comparable. However, tolerability is different and side effects, especially dry mouth, often limit their use. None of the agents show ideal efficacy or tolerability in all patients and, therefore, new agents and formulations are currently under clinical investigation.
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Oelke, M., de la Rosette, J.J., Michel, M.C. et al. Medikamentöse Therapie der Harninkontinenz. Internist 46, 75–82 (2005). https://doi.org/10.1007/s00108-004-1334-0
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DOI: https://doi.org/10.1007/s00108-004-1334-0