Habituation to zipeprol hydrochloride during pregnancy.

Zipeprol hydrochloride is a synthetic antitussive agent that has shown little evidence of addictive potential in animal studies. Despite this, several reports of abuse and abuse-related over-dosage have been published. Abuse of this drug has now become a problem in the United States-Mexico border region. We report the specific case of a pregnant woman habituated to zipeprol without evidence of other drug abuse and an abstinence syndrome observed in her newborn infant.