i think ur friend has physical dependence to codeine.
there are sm drugs that produce psychological dependence only like nicotine,caffeine... like in villages sm of old age ppl hv psychological addiction to "tea" bt if u will not gv them tea even for 3-4 days they will not suffer any withdrawl symptoms..other than yellling at u...
BT CODIENE ND MORHIN DEFINITELY PRODUCE PHYSICAL DEPEDENCE..in which that drug should continously be present in blood of addict.
wtever symtomps that u r telling: crying,weeping,headache nd most common loose motion ,are known as "withdrawl symptoms" that i mentioned in earlier post..
the method used is known as "detox"..there are home detox methods also with drug"suboxone"that is given to patient in place of codeine nd then tapered the dose slowly to stop taking suboxone...bt difficullty is tht patient does not know hw to taper the dose in home detox method...so u hv to take professional help..i m writing a address of rehabilitaion institute u can contact them:
"HOPE AND TRUST" rehabilitation and research center for drug abuse,banjara hills hyderabad.
contact no.- 04023396339..mob-08374601855 ,fax - 23302230