Comparative Pharmacology
Head-to-head clinical analysis: FENTORA versus OXYCONTIN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: FENTORA versus OXYCONTIN.
FENTORA vs OXYCONTIN
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Fentanyl is a potent mu-opioid receptor agonist, binding to and activating opioid receptors in the brain and spinal cord, leading to analgesia and sedation.
Oxycodone is a full opioid agonist with relative selectivity for the mu-opioid receptor, although it can bind to other opioid receptors at higher doses. The principal therapeutic action of oxycodone is analgesia. Like all full opioid agonists, there is no ceiling effect for analgesia with oxycodone. Clinically, dosage is titrated to provide adequate analgesia and may be limited by adverse reactions, including respiratory and CNS depression.
For opioid-tolerant adults: 100 mcg (one tablet) placed in buccal cavity; titrate upward in increments of 100 mcg per breakthrough pain episode, with minimum 2-hour interval between doses; maximum 4 doses per day.
10 mg orally every 12 hours; titrate based on pain severity and prior opioid exposure.
None Documented
None Documented
Terminal elimination half-life is approximately 2–4 hours in adults, but can range from 2 to 6 hours depending on hepatic clearance. In elderly or hepatically impaired patients, half-life may be prolonged. The rapid initial decline is due to redistribution, and the terminal phase reflects slow elimination from deep compartments.
4.5-5.0 hours (immediate-release); controlled-release OXYCONTIN has an apparent half-life of 4.5-8.7 hours. Terminal half-life is ~3.5-4 hours for immediate-release, reflecting context-sensitive elimination.
Primarily renal: Approximately 75% of the dose is excreted in urine as metabolites (mostly norfentanyl, despropionylfentanyl, and hydroxyfentanyl), with less than 7% as unchanged fentanyl. Fecal elimination accounts for about 9%.
Primarily renal (90% as metabolites, 10% unchanged). Also biliary/fecal (10%).
Category C
Category C
Opioid Analgesic
Opioid Analgesic