Comparative Pharmacology
Head-to-head clinical analysis: DEMEROL versus ZYDONE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DEMEROL versus ZYDONE.
DEMEROL vs ZYDONE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Meperidine is an opioid agonist that binds to mu-opioid receptors in the central nervous system, mimicking endogenous endorphins to produce analgesia, sedation, and euphoria. It also has additional weak actions at kappa and delta receptors.
Hydrocodone is a mu-opioid receptor agonist; acetaminophen produces analgesia via central COX inhibition and activation of descending serotonergic pathways.
50-150 mg IM, IV, or SC every 3-4 hours as needed for pain; oral 50-150 mg every 3-4 hours.
Oral: 1 to 2 tablets every 4 to 6 hours as needed for pain. Each tablet contains hydrocodone bitartrate 5 mg and acetaminophen 500 mg (Zydone 5/500). Maximum acetaminophen dose: 4000 mg/day (8 tablets).
None Documented
None Documented
2.5-4 hours; prolonged in hepatic impairment (7-11 hours) and elderly.
Terminal elimination half-life of hydrocodone is 3.8-4.5 hours in healthy adults; prolonged in elderly or hepatic impairment (up to 6-8 hours). Clinical context: dosing interval typically every 4-6 hours, adjusted for renal/hepatic insufficiency.
Renal (90% as metabolites and unchanged drug; ~5% unchanged) and biliary/fecal (minor).
Approximately 60% of hydrocodone and its metabolites are excreted renally as glucuronide conjugates; ~10% as norhydrocodone, hydromorphone, and other metabolites. Fecal excretion accounts for less than 5%. Total renal elimination: ~65-70%.
Category C
Category C
Opioid Analgesic
Opioid Analgesic