Comparative Pharmacology
Head-to-head clinical analysis: EMPRACET W CODEINE PHOSPHATE 3 versus QDOLO.
Peer-Reviewed Evidence
Head-to-head clinical analysis: EMPRACET W CODEINE PHOSPHATE 3 versus QDOLO.
EMPRACET W/ CODEINE PHOSPHATE #3 vs QDOLO
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Codeine is a prodrug metabolized to morphine, which acts as a mu-opioid receptor agonist. Acetaminophen inhibits cyclooxygenase (COX) and modulates descending serotonergic pathways, providing analgesia and antipyresis.
Tramadol is a centrally acting synthetic opioid analgesic. It binds to μ-opioid receptors and inhibits norepinephrine and serotonin reuptake.
One or two tablets (300 mg acetaminophen / 30 mg codeine phosphate per tablet) orally every 4 hours as needed for pain, not to exceed 12 tablets per day.
Oral: 50-100 mg every 4-6 hours as needed for pain; maximum 400 mg per day. Immediate-release tablets only. Extended-release formulations require different dosing and are not interchangeable.
None Documented
None Documented
Acetaminophen: 2-3 hours; codeine: 2.5-3 hours; both prolonged in hepatic impairment; clinical context: dosing every 4-6 hours for acute pain.
Terminal elimination half-life approximately 2-4 hours in adults; prolonged to 4-6 hours in elderly and up to 12-16 hours in severe renal impairment (CrCl <30 mL/min)
Acetaminophen is excreted renally as conjugates (glucuronide 60%, sulfate 30%, cysteine/mercapturate 8%), with <5% unchanged; codeine is metabolized to codeine-6-glucuronide (70%), norcodeine (10%), morphine (10%, via CYP2D6), and conjugates; renal excretion of metabolites; <15% of codeine excreted unchanged; fecal elimination minor.
Renal 90% (60% unchanged, 30% as glucuronide conjugate), fecal 10%
Category D/X
Category C
Opioid Agonist
Opioid Agonist