Comparative Pharmacology
Head-to-head clinical analysis: DURAGESIC 25 versus ZIPAN 25.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DURAGESIC 25 versus ZIPAN 25.
DURAGESIC-25 vs ZIPAN-25
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.
Selective serotonin reuptake inhibitor (SSRI); potentiates serotonergic activity by blocking serotonin reuptake into presynaptic neurons.
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.
25 mg orally twice daily
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
Terminal elimination half-life: 6-8 hours in adults; may be prolonged (up to 12 hours) in elderly or patients with renal impairment (CrCl <30 mL/min).
Renal (75% as metabolites, <10% unchanged); fecal (9%)
Primarily renal excretion of unchanged drug (70-80%); fecal elimination accounts for 15-20% via biliary excretion; less than 5% as metabolites.
Category C
Category C
Opioid Analgesic
Opioid Analgesic