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PetDosageChart

Loop diuretic · For Cats · 20 lb

How much Lasix for a 20 lb cat?

A 20 lb cat (9.1 kg) should receive approximately 18.1 mg of Lasix per dose, given every 8-24 hours (based on severity).

This dosage information is for educational purposes only. Always consult your veterinarian before giving any medication to your pet. Dosages may vary based on your pet's health conditions, other medications, and individual factors.

Content reviewed by licensed veterinarians. Sourced from Plumb's Veterinary Drug Handbook and the Merck Veterinary Manual.

Dosage · 20 lb cat

Lasix dose for a 20 lb cat

Low Dose

9.1

mg

Standard

18.1

mg

Max Safe

36.3

mg

Frequency

every 8-24 hours (based on severity)

Weight in kg

9.1 kg

Always confirm with your veterinarian before administering medication. These calculations are estimates based on published veterinary pharmacology references.

Other Weights

Lasix for a different size cat

FAQ · 20 lb cat

Questions about Lasix for a 20 lb cat

How much Lasix for a 20 lb cat?
A 20 lb cat should receive approximately 18.1 mg of Lasix (Furosemide) per dose, given every 8-24 hours (based on severity). That works out to about 1.5 × 12.5 mg. Always confirm with your veterinarian before administering medication.
What is the safe dose range of Lasix for a 20 lb cat?
The published dose range for a 20 lb cat is roughly 9.1 mg (low) to 36.3 mg (max safe), with 18.1 mg as the typical standard dose. Frequency: every 8-24 hours (based on severity).
How often can I give Lasix to a 20 lb cat?
Lasix is typically given every 8-24 hours (based on severity). Do not exceed the recommended frequency without veterinary guidance.

Need a different weight?

Use the calculator on the main Lasix page for any exact weight, or read the full dosage chart and safety information.

Full Lasix dosage guide →

Sources · 09

Sources & references

The dosage information on this page is compiled from the following veterinary and pharmaceutical references:

  • Plumb's Veterinary Drug Handbook — the standard veterinary pharmacology reference used by veterinarians worldwide.
  • Merck Veterinary Manual — a trusted, peer-reviewed resource for veterinary professionals and pet owners.
  • DailyMed (FDA Drug Labels) — official FDA-approved drug labeling and prescribing information for Furosemide.

Read more about our methodology and how we calculate dosages.