“…One such drug is pentazocine (Talwin) which, when used alone or in combination with other drugs such as tripelennamine citrate or codeine, can result in a neonatal withdrawal syndrome consisting of tremors, irritability, feeding difficulties, and hyperactivity, in addition to low birth weight and a high pitched cry [3][4][5][6]9,15]. Again, individual differences are found, so that an infant may appear to be unaffected by daily prenatal exposure, or when the drugs have been discontinued at least two months prior to birth [3]. In one case study an exposed infant who had exhibited neonatal symptoms appeared to be normal at one month of age [15].…”