Comparative Pharmacology
Head-to-head clinical analysis: PROPOXYPHENE HYDROCHLORIDE 65 versus VICODIN HP.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PROPOXYPHENE HYDROCHLORIDE 65 versus VICODIN HP.
PROPOXYPHENE HYDROCHLORIDE 65 vs VICODIN HP
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 that inhibits ascending pain pathways; acetaminophen inhibits cyclooxygenase and has antipyretic effects.
65 mg orally every 4 hours as needed for pain; maximum 390 mg/day.
One tablet (hydrocodone bitartrate 10 mg/acetaminophen 660 mg) orally every 4-6 hours as needed for pain; maximum 6 tablets per day.
None Documented
None Documented
6-12 hours (mean ~8 hours); prolonged in hepatic impairment and elderly; accumulation possible with repeated dosing.
Hydrocodone: 3.8-5.5 hours (mean 4.5 h). Acetaminophen: 2-3 hours. Clinical context: dosing interval every 4-6 hours for acute pain.
Renal excretion of unchanged drug (approximately 20-30%) and metabolites; approximately 40-60% as conjugated metabolites; minor biliary/fecal elimination.
Primarily renal: hydrocodone is eliminated as conjugated metabolites (glucuronides) ~80%; unchanged drug ~5%. Biliary/fecal: minor, <10%.
Category C
Category C
Opioid Analgesic
Opioid Analgesic