Unlabeled Use:
Contraindicated in:
Use Cautiously in:
CV: hypotension, bradycardia.
Derm: flushing, sweating.
EENT: blurred vision, diplopia, miosis.
Endo: adrenal insufficiency.
GI: constipation, nausea, vomiting.
GU: urinary retention.
Neuro: confusion, sedation, dysphoria, euphoria, floating feeling, hallucinations, headache, SEIZURES, unusual dreams.
Resp: RESPIRATORY DEPRESSION (INCLUDING CENTRAL SLEEP APNEA OR SLEEP-RELATED HYPOXEMIA).
Misc: allodynia, HYPERSENSITIVITY REACTIONS (INCLUDING ANAPHYLAXIS), opioid-induced hyperalgesia, physical dependence, psychological dependence, tolerance.
Drug-Drug:
Drug-Natural Products:
(Generic available)
Absorption: 50% from the GI tract; well absorbed from IM sites. Oral doses are about half as effective as parenteral doses. IV administration results in complete bioavailability.
Distribution: Widely distributed to tissues.
Metabolism/Excretion: Mostly metabolized by the liver; some converted to normeperidine, which may accumulate and cause seizures. 5% excreted unchanged by the kidneys.
Half-life: Neonates: 1239 hr; Infants 318 mo: 2.3 hr; Children 58 yr: 3 hr; Adults: 2.54 hr (↑ in impaired renal or hepatic function [711 hr]).
(analgesia)
ROUTE | ONSET | PEAK | DURATION |
---|---|---|---|
PO | 15 min | 60 min | 24 hr |
IM | 1015 min | 3050 min | 24 hr |
SUBQ | 1015 min | 4060 min | 24 hr |
IV | immediate | 57 min | 23 hr |
NDC Code*