Comparative Pharmacology
Head-to-head clinical analysis: PROPOXYPHENE HYDROCHLORIDE 65 versus VICODIN ES.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PROPOXYPHENE HYDROCHLORIDE 65 versus VICODIN ES.
PROPOXYPHENE HYDROCHLORIDE 65 vs VICODIN ES
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Propoxyphene is a centrally acting opioid agonist that binds to mu-opioid receptors in the central nervous system, inhibiting pain signal transmission and altering pain perception. It also has local anesthetic effects.
Hydrocodone is a mu-opioid receptor agonist; acetaminophen inhibits cyclooxygenase (COX) and modulates descending serotonergic pathways.
65 mg orally every 4 hours as needed for pain; maximum 390 mg/day.
Oral: 1 tablet (7.5 mg hydrocodone/300 mg acetaminophen) every 4-6 hours as needed for pain; maximum 6 tablets per day due to acetaminophen limit.
None Documented
None Documented
6-12 hours (mean ~8 hours); prolonged in hepatic impairment and elderly; accumulation possible with repeated dosing.
Hydrocodone: terminal half-life approximately 3.3-4.5 hours in adults, extended in hepatic or renal impairment. Acetaminophen: terminal half-life about 2-3 hours.
Renal excretion of unchanged drug (approximately 20-30%) and metabolites; approximately 40-60% as conjugated metabolites; minor biliary/fecal elimination.
Hydrocodone: primarily renal (urine) as unchanged drug and metabolites (O-demethylation and 6-keto-reduction products); ~26% excreted unchanged. Acetaminophen: renal (urine), ~85% as glucuronide and sulfate conjugates, ~2% unchanged.
Category C
Category C
Opioid Analgesic
Opioid Analgesic