Naturally occurring somatostatin and, even more so, its analogue, octreotide, by virtue of its greater manageability, are used extensively today in various pancreatic and gastrointestinal disorders, where their potent secretion-inhibiting capacity is exploited. In a number of conditions such as pancreatic fistulas the beneficial efficacy of the hormone is now definitely established both for therapeutic and for prophylactic purposes, whereas, in the other disease areas analyzed here, its use appears to be as an adjuvant to more specific and more radical procedures. Future clarification as to indications, dosage regimens and treatment times may reveal more strictly curative uses of octreotide in its own right, though, even as things stand at present, its efficacy as a complementary measure is so self-evident as to prompt its inclusion in treatment schedules both for enterocutaneous fistulas and for ascites and pancreatic pseudocysts.