When does meperidine reach peak effect after IV administration?

When does meperidine reach peak effect after IV administration?

• A. 5-10 minutes
• B. 2-4 hours
• C. 30-60 minutes
• D. 15-25 minutes

Answer: (C)

Peak effect timing depends on how the drug is given. For intravenous administration, meperidine reaches its maximal analgesic effect quickly because the drug goes straight into the bloodstream and rapidly distributes to its sites of action. In practice, the peak analgesic effect after IV meperidine is typically observed within a few minutes, often around 5–10 minutes. The 30–60 minute window is more consistent with slower absorption routes, such as intramuscular injection, where peak effect occurs later due to absorption from the muscle. So, stating that peak effect after IV administration occurs at 30–60 minutes isn’t aligned with IV pharmacokinetics; it reflects a different route of administration.

Peak effect timing depends on how the drug is given. For intravenous administration, meperidine reaches its maximal analgesic effect quickly because the drug goes straight into the bloodstream and rapidly distributes to its sites of action. In practice, the peak analgesic effect after IV meperidine is typically observed within a few minutes, often around 5–10 minutes.

The 30–60 minute window is more consistent with slower absorption routes, such as intramuscular injection, where peak effect occurs later due to absorption from the muscle. So, stating that peak effect after IV administration occurs at 30–60 minutes isn’t aligned with IV pharmacokinetics; it reflects a different route of administration.