An?l???? ?f th? ??rr?l?t??n b?tw??n the u?? ?file 18 v?r??u? ????h???t?v? ?ub?t?n??? reveals 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 ?? a brid