Comparative Pharmacology
Head-to-head clinical analysis: QDOLO versus TYLENOL W CODEINE NO 3.
Peer-Reviewed Evidence
Head-to-head clinical analysis: QDOLO versus TYLENOL W CODEINE NO 3.
QDOLO vs TYLENOL W/ CODEINE NO. 3
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Tramadol is a centrally acting synthetic opioid analgesic. It binds to μ-opioid receptors and inhibits norepinephrine and serotonin reuptake.
Codeine is a prodrug converted to morphine, which acts as a mu-opioid receptor agonist; acetaminophen inhibits cyclooxygenase (COX) and modulates cannabinoid and serotonergic pathways, with central analgesic effect.
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.
1-2 tablets (300 mg acetaminophen/30 mg codeine per tablet) orally every 4 hours as needed for pain; maximum 12 tablets per day.
None Documented
None Documented
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: 2-3 hours (prolonged in hepatic or renal impairment, overdose). Codeine: 2.5-3.5 hours; morphine from codeine: approx 2 hours; prolonged in hepatic or renal impairment.
Renal 90% (60% unchanged, 30% as glucuronide conjugate), fecal 10%
Acetaminophen: primarily renal (hepatic metabolism followed by renal excretion of metabolites; <5% unchanged). Codeine: renal (primarily as codeine and its metabolites, including morphine, norcodeine, and conjugated forms; 90% excreted in urine, 10% in feces).
Category C
Category D/X
Opioid Agonist
Opioid Agonist