id be a lil carefull taking it at first... stuff like tylenol 3's with codeine. when i would take them, my hands would swell way up and theyd itch like my hands were covered in fire ants. i dont think im alergic to codeine because i take codone oxys and they dont do that to me. so maybe i might be a tad alergic, but if that happens to you... dont take anymore... let your hands shrink back down and go to sleep. it probable means u either took to mucj or MAY be slightly alergic like i think i am. good luck, god bless