My son was using ketamine as an ilegal drug for 5 years but has now been off it for 1 year and so has alot of youngsters around are area and now my younger son has started using and I feel ketamine is taken over my children and want to know if there are other parents having to deal with this problem as the doctors dont know that much about it but I do know its very dangerous and the side affects i know about are shrinking of the bladder, my son got a stomac ulcer, is there anything else i should know as want to know more and help my kids well they are 23 and 20 yr olds???