Therapeutic Classification: opioid analgesics
Pharmacologic Classification: opioid agonists antagonists
High Alert
Absorption: Well absorbed after IM and SL use; 46–65% absorbed with buccal use; 15% of transdermal dose absorbed through skin; IV administration results in complete bioavailability.
Distribution: Crosses the placenta; enters breast milk. CNS concentration is 15–25% of plasma.
Protein Binding: 96%.
Half-Life: 2–3 hr (IV); 27 hr (buccal); 26 hr (transdermal); 37 hr (SL); 24–48 hr (subdermal); 43–60 days (SUBQ).
(analgesia)
ROUTE | ONSET | PEAK | DURATION |
---|---|---|---|
IM | 15 min | 60 min | 6 hr‡ |
IV | rapid | less than 60 min | 6 hr‡ |
SL | unknown | unknown | unknown |
Transdermal | unknown | unknown | 7 days |
Buccal | unknown | unknown | unknown |
SUBQ | unknown | unknown | unknown |
‡4–5 hr in children.
Contraindicated in:
Use Cautiously in:
CV: hypertension, hypotension, palpitations, QT interval prolongation
Derm: sweating, clammy feeling, erythema, pruritus, rash
EENT: blurred vision, diplopia, miosis (high doses)
Endo: adrenal insufficiency
GI: nausea, constipation, dry mouth, HEPATOTOXICITY, ileus, vomiting
Neuro: confusion, dysphoria, hallucinations, sedation, dizziness, euphoria, floating feeling, headache, unusual dreams
Resp: RESPIRATORY DEPRESSION (INCLUDING CENTRAL SLEEP APNEA AND SLEEP-RELATED HYPOXEMIA)
Misc: HYPERSENSITIVITY REACTIONS (INCLUDING ANAPHYLAXIS, ANGIOEDEMA, AND BRONCHOSPASM), injection site reactions, physical dependence, psychological dependence, tolerance
Drug-drug:
Drug-Natural Products:
Analgesia
Hepatic Impairment
Hepatic Impairment
Treatment of Opioid Use Disorder
Hepatic Impairment
Lab Test Considerations:
Toxicity and Overdose:
IV Administration:
NDC Code