Comparative Pharmacology
Head-to-head clinical analysis: DARVON N versus DOLENE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DARVON N versus DOLENE.
DARVON-N vs DOLENE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Propoxyphene is a weak mu-opioid receptor agonist that produces analgesia by binding to opioid receptors in the central nervous system, altering the perception of and response to pain. Its metabolite norpropoxyphene has local anesthetic and sodium channel blocking effects, which may contribute to cardiac toxicity.
Opioid agonist, primarily mu-opioid receptor activation, leading to analgesic and euphoric effects.
100 mg orally every 4 hours as needed for pain; maximum 600 mg per day.
50 mg orally every 4-6 hours as needed for pain; maximum 400 mg per day.
None Documented
None Documented
Propoxyphene: 6-12 hours; norpropoxyphene: 30-36 hours. Accumulation of norpropoxyphene on repeated dosing increases risk of toxicity.
2.5-3.5 hours; prolonged in hepatic impairment (up to 6-8 hours) and in neonates.
Primarily renal (approximately 70% as unchanged drug and glucuronide conjugates); minor biliary/fecal elimination (25-30%).
Renal: 70-80% as conjugated metabolites (mostly glucuronides), 5-10% as unchanged drug; Fecal: 5-10%; Biliary: minor.
Category C
Category C
Opioid Analgesic
Opioid Analgesic