Miglustat is an inhibitor of the N-linked oligosaccharide processing enzymes α-glucosidase I and II. It inhibits rat testicular enzymes ceramide-glucosyltransferase and β-glucosidase 2 with IC50 values of 32 and 81 µM respectively. Miglustat is used for the treatment of type 1 Gaucher’s disease. It is an inhibitor of HIV replication in vitro. It shows activity against SARS-CoV-2 in vitro with EC50 values in the micromolar range.