Why do strong narcotics have no reaction to some ppl unless given stronger doses? if i take such drugs i feel nothing, not even the high others feel

Several possible: Reasons for opiate resistence include over saturation (tolerance), unique source of the pain, emotional issues, etc. Try to work with your ohysicians to tinker with drugs, dosages, schedules, adding in psychotherapy and other non-drug interventions like accupuncture, meditation, massage, exercise, diet, hormones, etc. Best wishes.