A Patient Has Been Taking Naltrexone (ReVia)as Part of the Treatment

A patient has been taking naltrexone (ReVia) as part of the treatment for addiction to heroin.The nurse expects that naltrexone will have which effect for this patient?

A) Naltrexone prevents the cravings for opioid drugs.
B) Naltrexone works as a safer substitute for the heroin until the patient completes withdrawal.
C) The patient will experience hypertension and severe nausea if he takes heroin while on naltrexone.
D) If opioid drugs are used while taking naltrexone,euphoria is not produced;thus,the drug effects are lost.