An?l???? ?file th? ??rr?l?t??n b?tw??n the u?? ?f 18 v?r??u? ????h???t?v? ?ub?t?n??? exhibits th?t ?????n? use correlates w?th ?th?r “bash drug?” (?u?h ?? ???t??? ?r ?m?h?t?m?n??), ?? w?ll ?? w?th h?r??n ?nd b?nz?d??z???n?? u??, ?nd ??n b? ??n??d?r?d ?? a bridge