Comparative Pharmacology
Head-to-head clinical analysis: AVINZA versus XTAMPZA ER.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AVINZA versus XTAMPZA ER.
AVINZA vs XTAMPZA ER
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
AVINZA (morphine sulfate) is a full opioid agonist that binds to mu-opioid receptors in the CNS, producing analgesia by altering pain perception and emotional response to pain.
Oxycodone is a full mu-opioid receptor agonist, producing analgesia, euphoria, and sedation. Xtampza ER utilizes DETERx technology to provide extended-release properties and resist tampering.
Oral, 30 mg once daily (q24h) for opioid-naïve patients; titrate based on response. Maximum daily dose 160 mg. Administer with food to minimize peak effects.
Initial: 9 mg orally every 12 hours with food; titrate by 9 mg every 3-7 days as needed; maximum dose: 36 mg every 12 hours.
None Documented
None Documented
Terminal elimination half-life of morphine is approximately 1.5-2 hours; however, due to the extended-release formulation, the effective half-life is prolonged to about 9-11 hours, allowing once-daily dosing.
3-4 hours for immediate-release morphine; 8-12 hours for extended-release formulation (XTAMPZA ER), allowing twice-daily dosing
Primarily renal (approximately 90% as morphine metabolites, mainly morphine-3-glucuronide and morphine-6-glucuronide); biliary/fecal excretion accounts for less than 10%.
Primarily renal (70-90% as morphine-3-glucuronide, morphine-6-glucuronide, and free morphine); biliary/fecal (10-20%)
Category C
Category C
Opioid Analgesic
Opioid Analgesic