A former heroin addict is maintained on methadone, but succu

[vyasa.]

A former heroin addict is maintained on methadone, but succumbs to temptation and buys an opioid on the street. He takes it and rapidly goes into withdrawal. Which opioid did he take?

a. Meperidine

b. Heroin

c. Pentazocine

d. Codeine

e. Propoxyphene

[maria.]

C 4 sure as it is partial agonist of mu receptors results in sym of opioid withdrawal.