In the words of Neal Stephenson, they are '[opiate]-seeky.' They have a tendency dug in at the neurological level to seek opiates, even if they aren't doing so

In the words of Neal Stephenson, they are '[opiate]-seeky.' They have a tendency dug in at the neurological level to seek opiates, even if they aren't doing so at the moment. The distinction offered by Stephenson is that '*-seeky' is an adjective that modifies an individual, rather than a noun such as 'addict' which overshadows and eclipses an individual.