Comparative Pharmacology
Head-to-head clinical analysis: DARVON COMPOUND 65 versus PAPA DEINE 3.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DARVON COMPOUND 65 versus PAPA DEINE 3.
DARVON COMPOUND-65 vs PAPA-DEINE #3
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
DARVON COMPOUND-65 contains propoxyphene, a centrally acting opioid agonist with analgesic effects primarily mediated through mu-opioid receptors. Aspirin inhibits cyclooxygenase (COX) enzymes, reducing prostaglandin synthesis. Caffeine is a CNS stimulant with additive analgesic effects.
Acetaminophen produces analgesia and antipyresis via central COX-2 inhibition and activation of descending serotonergic pathways. Codeine is a prodrug converted to morphine, a mu-opioid receptor agonist, which inhibits ascending pain pathways and alters pain perception.
1 capsule (propoxyphene HCl 65 mg, aspirin 389 mg, caffeine 32.4 mg) orally every 4 hours as needed for pain; maximum 6 capsules per day.
1-2 tablets orally every 4-6 hours as needed for pain, not to exceed 12 tablets in 24 hours. Each tablet contains acetaminophen 300 mg, codeine phosphate 30 mg.
None Documented
None Documented
Propoxyphene: 6-12 hours (mean 8 h); nordextropropoxyphene: 22-30 hours (accumulates with repeated dosing; risk of toxicity)
Codeine: 2.5-3 hours; Acetaminophen: 2-3 hours; Morphine (active metabolite): 2-3 hours. In hepatic impairment, codeine half-life may extend to 4-6 hours.
Renal: ~90% as propoxyphene and metabolites (nordextropropoxyphene); biliary/fecal: ~10%
Primarily renal (90% as glucuronide conjugates, 10% as morphine, codeine, and norcodeine). Biliary/fecal elimination accounts for <5%.
Category C
Category C
Opioid Analgesic Combination
Opioid Analgesic Combination