In some clinics, treatment of heroin addiction under an anesthetic is
still used and consists of two phases. During phase one, the addict is
anesthetized and given Naltrexone, which immediately blocks the effects of
heroin. The user experiences some serious withdrawal symptoms but is not
aware of them because of the anesthetic. During phase two, the user keeps
on using Naltrexone for the next ten months to prevent relapse into the
old habit, since Naltrexone blocks the effects of heroin. So taking heroin
is useless. After a long period of using Naltrexone, the need for heroin
will decrease. Besides using the medication, treatment takes place in a
health care center, for instance by having talks with therapists. However,
research on this treatment is still being done.