Magnesium Sulfate for Cat
Cat · Felis catus · typical adult weight 2.50–7.00 kg
Magnesium Sulfate is used in cat for Hypomagnesemia, refractory seizures. Routes documented in cat: IV. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Magnesium Sulfate in cat, drawn from published veterinary references. Verify against current literature before clinical use.
Trade names: MgSO4, Epsom Salt
Dose ranges
| Route | Dose | Frequency | Duration | Indication | Evidence | Source |
|---|---|---|---|---|---|---|
| IV | 0.15–0.3 mEq/kg | CRI over 24h | 24-48 hours | Hypomagnesemia, refractory seizures | Moderate | Plumb's Veterinary Drug Handbook, 9th Ed |
Continuous-rate infusion (CRI) in cat
One of the cited rules is a continuous-rate-infusion regimen: IV 0.15–0.3 mEq/kg CRI over 24h. CRI regimens are delivered as a continuous infusion rather than discrete doses — verify the rate against the cited source before use.
Need the exact dose for your patient?
These ranges are per kg. Enter your cat's weight to get the precise dose and draw-up volume — unit and concentration math done for you.
Mechanism of action
Essential electrolyte. Blocks neuromuscular transmission, stabilizes cardiac membranes, and causes smooth muscle relaxation. Cofactor for 300+ enzymes.
Side effects & warnings
Treatment for hypomagnesemia, torsades de pointes, and eclampsia. Slow IV infusion. Respiratory depression at high levels. Monitor ECG and reflexes. Antidote: calcium gluconate.
Species-specific contraindications and adverse-reaction reports for cat may differ from canine / feline reference data — consult the primary citations listed with each rule.
Other Emergency drugs with cat dosing
Magnesium Sulfate dosing in other species
Why a species-specific page? Magnesium Sulfate pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in cat — 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.