Camiglibose is a glucopyranoside and inhibitor of alpha-glucosidase with antihyperglycemic activity patented by Merrell Dow Pharmaceuticals. In rats, a single oral dose of Camiglibose administered simultaneously with 2 g/kg body wt sucrose resulted in a dose dependent reduction in the area under the 0- to 3-h glycemic response curve, A reduction in the glycemic response to sucrose was accompanied by reduced insulin secretion. Camiglibose was more effective against a sucrose load in streptozocin-administered rats than in control rats and was as effective after 16 daily doses as after a single dose. Doses that reduced the glycemic response to carbohydrate did not inhibit liver lysosomal a-glucosidase activity or cause lysosomal glycogen accumulation. In cynomolgus monkeys, an oral dose of 1 mg/kg Camiglibose reduced the glycemic and insulin responses to sucrose