Comparative Pharmacology
Head-to-head clinical analysis: DURAGESIC 25 versus PROPOXYPHENE HYDROCHLORIDE 65.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DURAGESIC 25 versus PROPOXYPHENE HYDROCHLORIDE 65.
DURAGESIC-25 vs PROPOXYPHENE HYDROCHLORIDE 65
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Fentanyl is a mu-opioid receptor agonist that produces analgesia and sedation by mimicking endogenous opioids in the central nervous system.
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.
Apply 25 mcg/hour transdermally every 72 hours; initial dose in opioid-naive patients: 25 mcg/hour is not recommended; use lower strength or immediate-release opioid first.
65 mg orally every 4 hours as needed for pain; maximum 390 mg/day.
None Documented
None Documented
Terminal elimination half-life 22-25 hours (range 13-31 h) after 72-h transdermal application; prolonged in elderly, hepatic or renal impairment
6-12 hours (mean ~8 hours); prolonged in hepatic impairment and elderly; accumulation possible with repeated dosing.
Renal (75% as metabolites, <10% unchanged); fecal (9%)
Renal excretion of unchanged drug (approximately 20-30%) and metabolites; approximately 40-60% as conjugated metabolites; minor biliary/fecal elimination.
Category C
Category C
Opioid Analgesic
Opioid Analgesic