Comparative Pharmacology
Head-to-head clinical analysis: DURAGESIC 25 versus DURAGESIC 75.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DURAGESIC 25 versus DURAGESIC 75.
DURAGESIC-25 vs DURAGESIC-75
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.
Fentanyl is a potent opioid agonist primarily at the mu-opioid receptor, exerting its analgesic effects by mimicking endogenous endorphins and enkephalins to activate G-protein-coupled inwardly rectifying potassium channels, leading to hyperpolarization and reduced neuronal excitability in pain pathways.
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.
Adults: Apply one 75 mcg/hr transdermal patch every 72 hours. Start with lower dose in opioid-naive patients.
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
22-25 hours after removal of patch; increased in elderly, hepatic/renal impairment
Renal (75% as metabolites, <10% unchanged); fecal (9%)
Renal (75% as metabolites, <10% unchanged), fecal (25%)
Category C
Category C
Opioid Analgesic
Opioid Analgesic