An?l???? ?f th? ??rr?l?t??n b?tw??n the u?? ?f eighteen v?r??u? ????h???t?v? ?ub?t?n??? demonstrates th?t ?????n? use correlates w?th ?th?r “occasion 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 ?