Pocket Pet · Mus musculus · typical adult weight 0.02–0.04 kg
Morphine is dosed at 2–5 mg/kg SC, IM q4h in mice, per 7. Allweiler SI. How to improve anesthesia and analgesia in small mammals. Vet Clin North Am Exot Anim Pract. 2016;19:361-377.; 130. Morrisey JK, Carpenter JW. Formulary. In: Quesenberry KE, Carpenter JW, eds. Ferrets, Rabbits, and Rodents: Clinical Medicine and Surgery, 4th ed., Elsevier, St. Louis, MO; 2021:620-630. — Mined from Carpenter's Exotic Animal Formulary, 6th Ed, p.792 (2026-08-01, PENDING REVIEW) doi:10.1016/j.cvex.2016.01.012. Morphine is used in mice for Analgesia (opioid). Routes documented in mice: SC, IM. A typical adult mouse weighs 0.02–0.04 kg. ExoticRx lists 1 cited dose rule for Morphine in mice, drawn from published veterinary references. Verify against current literature before clinical use.
| Route | Dose | Frequency | Indication | Evidence | Source |
|---|---|---|---|---|---|
| SC, IM | 2–5 mg/kg | q4h | Analgesia (opioid) | Moderate | 7. Allweiler SI. How to improve anesthesia and analgesia in small mammals. Vet Clin North Am Exot Anim Pract. 2016;19:361-377.; 130. Morrisey JK, Carpenter JW. Formulary. In: Quesenberry KE, Carpenter JW, eds. Ferrets, Rabbits, and Rodents: Clinical Medicine and Surgery, 4th ed., Elsevier, St. Louis, MO; 2021:620-630. — Mined from Carpenter's Exotic Animal Formulary, 6th Ed, p.792 (2026-08-01, PENDING REVIEW) doi:10.1016/j.cvex.2016.01.012 |
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These ranges are per kg. Enter your mouse's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Prototype full mu-opioid receptor agonist. Activates mu, kappa, and delta opioid receptors producing analgesia, sedation, and euphoria.
Histamine release with rapid IV injection (hypotension, bronchoconstriction — give slowly). Vomiting and defecation common initial effects. Respiratory depression. Cats: may cause excitation/dysphoria at higher doses. Controlled substance (Schedule II).
Species-specific contraindications and adverse-reaction reports for mice may differ from canine / feline reference data — consult the primary citations listed with each rule.
Morphine dose range in mice, with cited source references: SC, IM 2–5 mg/kg q4h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Morphine in mice: SC, IM.
Morphine is indicated in mice for: Analgesia (opioid).
These are general warnings for Morphine across species; consult the mouse dosing table above for species-specific guidance. Histamine release with rapid IV injection (hypotension, bronchoconstriction — give slowly). Vomiting and defecation common initial effects. Respiratory depression. Cats: may cause excitation/dysphoria at higher doses. Controlled substance (Schedule II).
Why a species-specific page? Morphine pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in mice — the rules above are the citations specific to this species, not generic recommendations.
Sourced from published veterinary references; awaiting credentialed clinical reviewer. See our editorial process. Reference only — not veterinary advice.