Grand parents do have rights to see there grand children. If it becomes a problem to where they refuse you the right to see then you can take them to court and the corts will most likely award you visitation rights. And because of the history with drug it is even posible to take costity of the child. If you were to take the parent to cort and prove her not to be a stable mother or that the place of residence is not safe you can take the child. and if you belive that the people are drugs now you can request for them to be drug tested.

