Hi my heart goes out to you …I only have one of my children taking drugs i could nt imagine how much pressure i wpold feel if the others were the same…Firstly and most important though is yourself you need to take care of yourself because u seriously need to get some advice regarding your grandchildren before they end up taking the same path or at the very least stay strong so they have got someone stable to turn to…Unfortunately i had to evict my son as I have a toddler at home…they shared a bedroom and I was terrified my eldest was either going to drop something that the toddler would pick up or worse…I will not under any circumstances allow any of my other children or other members of the household being put at risk. Im not for one minute suggesting u evict them but you seriously need to set some ground rules for what you expect after all its your home…u pay the bills