Late-onset angioedema due to an angiotensin-converting enzyme inhibitor.

Angioedema is a rare but potentially life-threatening adverse effect of angiotensin-converting enzyme inhibitors. A patient who presented with facial angioedema four months after initiating antihypertensive treatment with enalapril is described. Angioedema due to angiotensin-converting enzyme inhibitors usually appears during the first weeks of treatment. Late-onset angioedema is often unrecognized.