This text focuses on the under-recognized and undertreated problem of addiction in later life. The widespread lack of clinical knowledge about this patient population can be traced to several sources: the systematic exclusion of older individuals from clinical trials; their reluctance to seek medical help owing to stigma and shame; the fact that additive disorders may be disguised by concurrent medical conditions; a lack of screening instruments tailored to an older population; and the low sensitivity of standard diagnostic criteria for detecting addiction in middle-aged and elderly adults...