Furosemide for Dogs

Dog · Canis lupus familiaris · typical adult weight 2.00–80.00 kg

Furosemide is dosed at 2–4 mg/kg IM q6-8h in dogs, per Keene BW, Atkins CE, Bonagura JD, et al. ACVIM consensus guidelines for the diagnosis and treatment of myxomatous mitral valve disease in dogs. J Vet Intern Med. 2019;33:1127-1140. doi:10.1111/jvim.15488 — Verified against Plumb's Veterinary Drug Handbook, 10th Ed, p.592 (2026-08-01). — Plumb's 10th ed (held) printed p.563, Furosemide monograph spanning p.563-567; page located 2026-08-05 from the book's own running heads, verified to name the drug in its body text. — SOURCE EDITION: Plumb's Veterinary Drug Handbook — ISBN 9781394172207, https://openlibrary.org/isbn/9781394172207. Furosemide is used in dogs for CHF when IV not available, Oliguric renal failure (to promote urine production), Acute CHF, pulmonary edema (emergency), Adjunctive treatment of congestive heart failure (oral maintenance, stage C myxomatous mitral valve disease). Routes documented in dogs: IM, IV, PO, SC. A typical adult dog weighs 2.00–80.00 kg. ExoticRx lists 7 cited dose rules for Furosemide in dogs, drawn from published veterinary references. Verify against current literature before clinical use.

US trade names: Lasix, Salix

Dose ranges

Route	Dose	Frequency	Duration	Indication	Evidence	Source
IM	2–4 mg/kg

What each reference text prints

Every held source for this drug and species, as printed. Where they differ, both are shown — the choice is yours, not ours.

The sources disagree for this combination. The ranges below do not overlap on a comparable route. This is not an error in one of them — published veterinary references differ, and reconciling them for a particular patient is a clinical judgement.

Printed doses in % for this drug and species, by source
Dose (%)	Route	Source	As printed
5	IV	Papich Saunders Handbook of Veterinary Drugs, 4th edp.376	natively, a dose of 2 mg/kg in 5% glucose can be infused over an 8 hour period IV.

Printed doses in mg/kg for this drug and species, by source
Dose (mg/kg)	Route	Source	As printed
1–5	PO	BSAVA Small Animal Formulary, 10th ed — Part A (Canine and Feline)p.193	l effusion present. • Chronic, congestive heart failure: 1-5 mg/kg p.o. q6-12h. Typical maintenance doses for mild to moderate CHF are 1-2 mg/kg p

Side effects & warnings

Monitor electrolytes (hypokalemia, hyponatremia). Ototoxicity at high IV doses. Dehydration risk. May worsen renal azotemia. Adjust dose based on clinical response.

Species-specific contraindications and adverse-reaction reports for dogs may differ from canine / feline reference data — consult the primary citations listed with each rule.

Frequently asked questions

What is the dose of Furosemide for Dogs?

Furosemide dose ranges in dogs, with cited source references: IM 2–4 mg/kg q6-8h; IV 2–6 mg/kg q6-8h; IV 2–4 mg/kg q1-4h; PO 1–2 mg/kg q12h. Reference ranges from cited sources — verify against current literature before clinical use.

How is Furosemide administered in Dogs?

Documented routes for Furosemide in dogs: IM, IV, PO, SC.

How long is Furosemide given in Dogs?

Cited course lengths for Furosemide in dogs include: Until IV access or oral feasible; 48-72 hours trial; Emergency until stabilized; Chronic with monitoring. Duration depends on the indication — match it to the specific dose rule in the table above.

What conditions does Furosemide treat in Dogs?

Furosemide is indicated in dogs for: CHF when IV not available, Oliguric renal failure (to promote urine production), Acute CHF, pulmonary edema (emergency), Adjunctive treatment of congestive heart failure (oral maintenance, stage C myxomatous mitral valve disease), Cardiogenic pulmonary edema (chronic management), CHF, pulmonary edema, ascites, CHF maintenance when oral difficult.

What are the side effects of Furosemide in Dogs?

These are general warnings for Furosemide across species; consult the dog dosing table above for species-specific guidance. Monitor electrolytes (hypokalemia, hyponatremia). Ototoxicity at high IV doses. Dehydration risk. May worsen renal azotemia. Adjust dose based on clinical response.

Why a species-specific page? Furosemide pharmacokinetics differ across species: dose ranges, intervals, and route preferences are not interchangeable. Cross-extrapolation from canine doses is unsafe in dogs — the rules above are the citations specific to this species, not generic recommendations.