Phencyclidine (PCP) remains a widely used illicit drug, especially among adolescents and young adults. The pharmacologic effects of PCP are similar to those of cocaine; therefore, in this retrospective study 37 PCP-intoxicated parturients were matched for ethnicity, tobacco use, age, gravidity, and degree of prenatal care with 37 cocaine-intoxicated parturients. Infants exposed to PCPin uterolike those exposed to cocaine, had a high incidence of intrauterine growth retardation (32 vs 19%, N.S.), precipitate labor (43 vs 27%, N.S.), symptoms of neonatal drug withdrawal/intoxication, and prolonged neonatal hospitalizations. Moreover, they were more likely to have meconium-stained amniotic fluid (30 vs 19%,p=. 05) and less likely to be born prematurely as cocaine-exposed infants. The comparison between the long-term developmental outcome of these groups awaits further study.