NOTE: Some have argued that fish oils are oxidative upon digestion and that fish oil thus probably does significant aging and cellular damage internally that we may not yet understand. However, several studies suggest this to be a relative non-issue.  In addition, one study also found that additional Vitamin E can protective help overcome most of the small amount of oxidative damage that is done anyway. The study authors found that oxidative products in the urine "more than doubled when the fish oil capsules were introduced but then dropped by a factor of four when vitamin E was added. The vitamin E concentration in the red blood cells dropped very significantly when fish oil was ingested but more than recovered with the vitamin E supplement". 
Chills or cold flashes with goose bumps (" cold turkey ") alternating with flushing (hot flashes), kicking movements of the legs ("kicking the habit"  ) and excessive sweating are also characteristic symptoms.  Severe pains in the bones and muscles of the back and extremities occur, as do muscle spasms. At any point during this process, a suitable narcotic can be administered that will dramatically reverse the withdrawal symptoms. Major withdrawal symptoms peak between 48 h and 96 h after the last dose and subside after about 8 to 12 days. Sudden withdrawal by heavily dependent users who are in poor health is very rarely fatal. Morphine withdrawal is considered less dangerous than alcohol, barbiturate, or benzodiazepine withdrawal.