Cr??k ?????n? as ??ld on the streets may b? adulterated or “?ut” w?th other substances m?m??k?ng th? ?????r?n?? of ?r??k ?????n? t? ?n?r???? bulk. U?? ?file t?x?? ?dult?r?nt? such ?? levamisole h?? b??n d??um?nt?d. R????t?d ?????n? use ??n ?r?du?? ?dd??t??n ?nd other ?dv?r?? h??l