<prompt> Naltrexone is used in opioid addiction because -To treat withdrawal symptomsTo treat overdose of opioidsPrevent relapseHas addiction potential  <response>: Naltrexone can be used orally to assist in the rehabilitation of ex-opioid abusers who are fully withdrawn. However, It should be kept in mind that naltrexone should be used only after full withdrawal of opioid, otherwise acute withdrawal syndrome will be precipitated as naltrexone antagonizes the action of opioids on opioid receptors.Naltrexone prevents relapse by discouraging substance seeking behavior If a patient, who is on naltrexone maintenance therapy, takes on an opioid, there is no kicks or euphoria as opioid receptors are already blocked. 