Which of the following are morphine derivatives?

Which of the following are morphine derivatives?

• A. Hydromorphone, heroin, naloxone, naltrexone
• B. Morphine, codeine, oxycodone, hydromorphone
• C. Meperidine, fentanyl, methadone, buprenorphine
• D. Oxycodone is a thebaine derivative

Answer: (B)

Morphine derivatives are opioids that keep the morphinan framework of morphine and are obtained by modifying that structure. Codeine and hydromorphone are classic examples of direct morphine derivatives, and oxycodone is considered a morphine-related derivative because it preserves the core morphinan skeleton even though its synthesis starts from a related precursor. This makes them part of the same family clinically and chemically. In contrast, opioids like meperidine, fentanyl, and methadone have different core structures and do not share the morphinan backbone, while thebaine-derived oxycodone is often discussed separately in terms of its origin. Therefore, the blend of morphine, codeine, oxycodone, and hydromorphone best fits the idea of morphine derivatives.

Morphine derivatives are opioids that keep the morphinan framework of morphine and are obtained by modifying that structure. Codeine and hydromorphone are classic examples of direct morphine derivatives, and oxycodone is considered a morphine-related derivative because it preserves the core morphinan skeleton even though its synthesis starts from a related precursor. This makes them part of the same family clinically and chemically. In contrast, opioids like meperidine, fentanyl, and methadone have different core structures and do not share the morphinan backbone, while thebaine-derived oxycodone is often discussed separately in terms of its origin. Therefore, the blend of morphine, codeine, oxycodone, and hydromorphone best fits the idea of morphine derivatives.