Iversen E, Jeppesen D, Steensgaard-Hansen F
Department of Internal Medicine C, Glostrup Hospital, University of Copenhagen, Denmark.
J Intern Med. 1990 Apr;227(4):285-6. doi: 10.1111/j.1365-2796.1990.tb00160.x.
In the reported case history, a normotensive and non-diabetic patient with ischaemic heart disease was treated twice with diltiazem. On both occasions diabetes mellitus developed within a few days; at first this was fully reversible, but on the last occasion it was irreversible.