What is the onset time of meperidine after IV administration?

What is the onset time of meperidine after IV administration?

• A. 1 minute
• B. 15 minutes
• C. 5 minutes
• D. 30 minutes

Answer: (C)

When given IV, a drug’s onset reflects how quickly it reaches the brain and produces analgesia, since it bypasses absorption barriers. Meperidine reaches the CNS and exerts its effect in a matter of minutes, with about a 5-minute timeframe commonly cited for the appearance of noticeable analgesia after an IV dose. The other time options don’t fit the IV kinetics: 1 minute is typically too fast for an IV opioid to elicit measurable analgesia, while 15 or 30 minutes would indicate a much slower or delayed onset that is not consistent with IV administration or typical clinical experience.

When given IV, a drug’s onset reflects how quickly it reaches the brain and produces analgesia, since it bypasses absorption barriers. Meperidine reaches the CNS and exerts its effect in a matter of minutes, with about a 5-minute timeframe commonly cited for the appearance of noticeable analgesia after an IV dose. The other time options don’t fit the IV kinetics: 1 minute is typically too fast for an IV opioid to elicit measurable analgesia, while 15 or 30 minutes would indicate a much slower or delayed onset that is not consistent with IV administration or typical clinical experience.