Comparative Pharmacology
Head-to-head clinical analysis: MS CONTIN versus OXYMORPHONE HYDROCHLORIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: MS CONTIN versus OXYMORPHONE HYDROCHLORIDE.
MS CONTIN vs OXYMORPHONE HYDROCHLORIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Mu-opioid receptor agonist; binds to mu-opioid receptors in the CNS, modulating pain perception and emotional response to pain.
Oxymorphone is a semi-synthetic opioid agonist that binds to mu-opioid receptors in the central nervous system, inhibiting ascending pain pathways and altering pain perception and response. It also has affinity for kappa and delta opioid receptors.
Oral: 15-30 mg every 8-12 hours; adjust based on pain severity and prior opioid use. Extended-release tablets must be swallowed whole; do not crush or chew. For opioid-naïve patients, start at 15 mg every 12 hours.
Initial: 1 mg IV/IM every 3-4 hours as needed for moderate to severe pain; titrate to effect. For patient-controlled analgesia (PCA), 0.5 mg IV loading dose, then 0.25-0.5 mg every 6-15 minutes with lockout. Rectal suppository: 5 mg every 4-6 hours.
None Documented
None Documented
Terminal elimination half-life: 11-13 hours (range 8-24 hours). In elderly or hepatic impairment, half-life may be prolonged; acute dosing half-life ~2-4 hours.
Terminal elimination half-life: 7-9 hours (range 4-12 h in elderly/renal impairment). Clinically, steady-state achieved within 24-36 hours.
Renal: ~90% (mostly as morphine-3-glucuronide and morphine-6-glucuronide, with ~10% as unchanged morphine); Fecal: <10%
Primarily renal (90% as parent drug and metabolites); <1% fecal. Unchanged oxymorphone accounts for ~30% of urinary recovery.
Category C
Category C
Opioid Analgesic
Opioid Analgesic