Cat · Felis catus · typical adult weight 2.50–7.00 kg
Magnesium Sulfate is dosed at 0.15–0.3 mEq/kg IV CRI over 24h in cats, per Plumb's Veterinary Drug Handbook, 10th ed (2023, held copy; the original seed cited the 9th, which was never consulted) — Plumb's 10th ed (held) printed p.791-792 (corpus PDF p.818-819), Magnesium, IV monograph, Dosages [LOCATOR CORRECTED 2026-08-12 — the clause previously here named the Magnesium Hydroxide monograph, an oral antacid]; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — figure located 2026-08-05 at Plumb's 10th ed printed p.792, Magnesium, IV monograph; the page cited previously does not carry it. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207. Magnesium Sulfate is used in cats for Hypomagnesemia, refractory seizures. Routes documented in cats: IV. A typical adult cat weighs 2.50–7.00 kg. ExoticRx lists 1 cited dose rule for Magnesium Sulfate in cats, drawn from published veterinary references. Verify against current literature before clinical use.
US trade names: MgSO4, Epsom Salt
| 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, 10th ed (2023, held copy; the original seed cited the 9th, which was never consulted) — Plumb's 10th ed (held) printed p.791-792 (corpus PDF p.818-819), Magnesium, IV monograph, Dosages [LOCATOR CORRECTED 2026-08-12 — the clause previously here named the Magnesium Hydroxide monograph, an oral antacid]; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — figure located 2026-08-05 at Plumb's 10th ed printed p.792, Magnesium, IV monograph; the page cited previously does not carry it. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207 |
Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.
| Dose (meq/kg) | Route | Source | As printed |
|---|---|---|---|
| 0.2–0.3 | — | Papich Saunders Handbook of Veterinary Drugs, 4th edp.497 | • Intravenous dose for magnesium deficiency or arrhythmias: 0.2-0.3 mEq/kg |
| 0.12 | IV | Papich Saunders Handbook of Veterinary Drugs, 4th edp.497 | (0.1-0.15 mmol/kg) IV at a rate of 0.12 mEq/kg/min (0.06 mmol/kg/min). |
| 0.2–1 | IV | Papich Saunders Handbook of Veterinary Drugs, 4th edp.497 | 0.2-1.0 mEq/kg/day IV (0.1-0.5 mmol/kg/day). |
| 0.75–1 | — | Papich Saunders Handbook of Veterinary Drugs, 4th edp.497 | • Use during fluid therapy: Supplement fluid solutions with 0.75-1 mEq/kg/day. |
Figures are transcribed from the cited page or table of each held edition and are shown for reference only. They are not dose recommendations, they do not feed the calculator, and none has been reviewed by a veterinarian.
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.
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Essential electrolyte. Blocks neuromuscular transmission, stabilizes cardiac membranes, and causes smooth muscle relaxation. Cofactor for 300+ enzymes.
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 cats may differ from canine / feline reference data — consult the primary citations listed with each rule.
Magnesium Sulfate dose range in cats, with cited source references: IV 0.15–0.3 mEq/kg CRI over 24h. Reference ranges from cited sources — verify against current literature before clinical use.
Documented routes for Magnesium Sulfate in cats: IV.
Cited course lengths for Magnesium Sulfate in cats include: 24-48 hours. Duration depends on the indication — match it to the specific dose rule in the table above.
Magnesium Sulfate is indicated in cats for: Hypomagnesemia, refractory seizures.
These are general warnings for Magnesium Sulfate across species; consult the cat dosing table above for species-specific guidance. Treatment for hypomagnesemia, torsades de pointes, and eclampsia. Slow IV infusion. Respiratory depression at high levels. Monitor ECG and reflexes. Antidote: calcium gluconate.
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 cats — 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.