When I was pregnant with my son [third child] I was given phenoba...

When I was pregnant with my son [third child] I was given phenobarbitol and syniquan to keep me from delivering to soon. My son is and has always been several steps behind children his on age. He was delayed in tieing shoes,riding a bike,he wet the bed until he was 9. In elementary school he was unable to sit still for long periods of time,in middle school he was unable to concentrate on more than one thing at a time, which caused major problems. In high school he was disruptive,defiant, they called him lazy. I took him to therapists and counciling,they diagnosied him as being depressed, defiant,adhd and he has a conduct disorded. Can these be side affects? Thank You, Rosie ***