Replaces deficient endogenous enzyme (β-glucocerebrosidase; glucosylceramidase) in Gaucher’s disease. Increases degradation of glucosylceramide (glucocerebroside) in macrophages by hydrolyzing β-glycoside linkage of glucocerebroside to glucose and ceramide (N-acylsphingosine) with resultant reduction in liver and spleen size, amelioration of anemia and thrombocytopenia, decreased bone pain, decreased cachexia, and increased bone remineralization.