I have heard about Street Children using drugs. I don't want to sponsor a drug user. A child on the street is a child without a future, period. The preferred drug among street kids is a very toxic shoe glue. When high they are not aware of hunger or thirst, pain or rejection, cold nor wet, only the brief euphoria that the glue gives them while it slowly kills them.
Drug counseling is an integral part of the overall programs.
The death rate for children living on the street is up to three thousand times higher than the national average for children living in their own homes. The Murder rate for the same group is six to 10 thousand times higher. If you do not wish to sponsor a child that is using or has used drugs, I would advise against sponsoring a street child. Street children are at extreme risk. This decision would be made by the staff of support in their country.