Long term effects in these children are not yet known. Addiction is a major risk of using illegal and controlled prescription drugs. Heroin, codeine, opiates, barbiturates, and morphine are strongly physically addicting. Cocaine produces both physical and psychological addiction. Withdrawal from narcotics, barbiturates and cocaine is difficult and painful.
Drug users aften return to using drugs.
Over time, the drug user usually suffers from malnutrition and a lowered immune system.