Method and composition for treating irritable bowel syndrome using low doses of opioid receptor antagonists

   
   

This invention relates to a method for treating a subject with irritable bowel syndrome ("IBS") which comprises long-term administration of an opioid receptor antagonist at an appropriately low dose which will selectively antagonize excitatory opioid receptor functions, but not inhibitory opioid receptor functions, in myenteric neurons in the intestinal tract as well as in neurons of the central nervous system ("CNS"). The administration of the opioid receptor antagonist at a low dose enhances the potency of the inhibitory effects of endogenous opioid peptides present in the intestinal tract and the CNS, thereby reducing abdominal pain and stool frequency resulting from abnormally supersensitized excitatory opioid receptor functions. The invention also relates to a composition for treating a subject with IBS, which comprises an effective dose of an opioid receptor antagonist, and a pharmaceutically acceptable carrier.

Esta invención se relaciona con un método para tratar un tema con el síndrome irritable del intestino ("IBS") que abarca la administración a largo plazo de un antagonista del receptor del opioid en una dosis apropiadamente baja que ponga selectivamente funciones excitatory del receptor en contra del opioid, solamente las funciones no inhibitorias del receptor del opioid, en neuronas myenteric en la zona intestinal así como en las neuronas del sistema nervioso central ("CNS"). La administración del antagonista del receptor del opioid en una dosis baja realza la potencia de los efectos inhibitorios de los peptides endógenos del opioid presentes en la zona intestinal y el CNS, de tal modo reduciendo la frecuencia abdominal del dolor y del taburete que resultaba de anormalmente supersensitized funciones excitatory del receptor del opioid. La invención también se relaciona con una composición para tratar a un tema con IBS, que abarca una dosis efectiva de un antagonista del receptor del opioid, y a un portador farmacéutico aceptable.

 
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