“May all be happy, may all be healed, may all be at peace and may no one ever suffer."
Racecadotril is a pure intestinal antisecretory active substance. It decreases the intestinal hypersecretion of water and electrolytes induced by cholera toxin or inflammation and does not have effects on basal secretory activity.
Following oral administration, Racecadotril is rapidly absorbed and then hydrolysed to thiorphan, which is an inhibitor of enkephalinase, a cell membrane peptidase located in various tissues, notably the epithelium of the small intestine. This enzyme contributes both to the hydrolysis of exogenous peptides and to the breakdown of endogenous peptides such as enkephalins. Racecadotril protects enkephalins from enzymatic degradation thereby prolonging their action at enkephalinergic synapses in the small intestine and reducing hypersecretion. Racecadotril exerts rapid antidiarrhoeal action, without modifying the duration of intestinal transit.
Pharmacology
Racecadotril increases the availability of endogenous opioids (enkephalins) by inhibiting the membrane-bound enkephalinase. The enkephalins in turn mediate their effect through δ receptor ( delta opioid receptor) activation that induces a selective increase in Cl absorption by inhibiting adenylate cyclase.
Onset: 30 min (plasma enkephalinase inhibition).