Meperidine has a shorter duration of action than which opioid?

Meperidine has a shorter duration of action than which opioid?

• A. Not sure
• B. False
• C. It has a longer DOA than morphine
• D. True

Answer: (D)

Meperidine has a relatively short duration of analgesic action compared with morphine. The reason lies in its pharmacokinetics: after administration it redistributes quickly and is cleared faster, so the pain-relieving effect doesn’t last as long. In typical clinical dosing, meperidine’s analgesic duration is about 2–4 hours, whereas morphine tends to provide longer-lasting relief, roughly 3–4 hours or more depending on the route and dose. This is why meperidine is considered to have a shorter duration of action than morphine. It’s also worth noting that its metabolite, normeperidine, can accumulate with repeated dosing and potentially cause CNS excitation, which is a separate consideration from the immediate duration of analgesia.

Meperidine has a relatively short duration of analgesic action compared with morphine. The reason lies in its pharmacokinetics: after administration it redistributes quickly and is cleared faster, so the pain-relieving effect doesn’t last as long. In typical clinical dosing, meperidine’s analgesic duration is about 2–4 hours, whereas morphine tends to provide longer-lasting relief, roughly 3–4 hours or more depending on the route and dose. This is why meperidine is considered to have a shorter duration of action than morphine. It’s also worth noting that its metabolite, normeperidine, can accumulate with repeated dosing and potentially cause CNS excitation, which is a separate consideration from the immediate duration of analgesia.