Ketamine infusions: These are definitely delivered intravenously in a very healthcare facility or clinic setting and generally past about forty minutes.??? ??? ??????? ?? ??? ??? ????? ????????? ??? ???? ???? ?? ???? ???? ?? ??? ??????? ??????? ?????????? ?????? ??? ????????? ??? ???? ????? ??? ??????? ?? ???? ??????? ????? ?????? ??????? ???? ????