Could it have been Methadone?  Often given to people to help them stay off heroin but it is a killer when taken in large quantities and I know this first hand. A close  family overdosed and died from it. One sign of overdose can be severe itching. His lady friend overdosed on fentanyl.   Children born to parents who use Meth or Heroin even a few times in early pregnancy can and often do have babies with nerve ending problems, learning disabilities, hyperactivity, muscular developmental problems, bone deformities, speech problems and blocked brain cells. These children end up in foster homes.  They are difficult to care for. Babies are born with tremors even from mothers who over use prescription drugs and stay in the hospital until  weaned off of drugs. If for any reason male or female is using drugs please use birth control. Unfair to bring a child into the world who will have life long disabilities. These children are also high risk for becoming drug abusers.