Not true about Naltrexone

Ans. is 'a' i.e., Parenterally administered Naltrexone (antagonist on all opioid receptors) o More potent than naloxone. It can be given orally It is used as a maintenance drug for opioid addicts - opioid blockade therapy ofpostaddict. o It is also used to decrease craving in chronic alcoholism. o The most impoant side effect is hepatotoxicity.