How should I go about detoxing myself from painkilller.?

See below. Without medical supervision, its tough. One could reduce dosage by ten percent daily. Suboxone is indicated for this. Various non-controlled medicines help.
Addiction medicine . Consult with addiction medicine specialist. Although nobody died from withdrawal syndrome, it may be really unpleasant experience. Guided tapering of drugs and supplemental medications that reducing withdrawal symptoms are the best strategies.