Criteria of a Pharmacologic Withdrawal Syndrome

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Abstract
To the Editor.— Hughes and Hatsukami1 add significant findings to our knowledge of the syndrome that ensues when smokers stop smoking. As they suggest, this is very likely a nicotine withdrawal syndrome. Their analysis of alternative hypotheses, however, ignores an important possibility. If it is assumed that a person using a psychotropic drug for a long time was normal without that drug, then a behavioral disorder when the drug is stopped may well be a classic pharmacologic withdrawal syndrome. In reality, however, the assumption cannot be tested because addicts do not come to our attention before their addiction. An alternative hypothesis is that the long-term drug user is self-medicating a behavioral disorder that antedates the drug exposure. In that case, stopping the drug will expose a previously masked set of symptoms. Here we would not be dealing with a classic withdrawal syndrome at all. Either mechanism would produce all

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