Antibiotic (Penicillin) · For Cats · 18 lb
How much Amoxicillin for a 18 lb cat?
A 18 lb cat (8.2 kg) should receive approximately 81.6 mg of Amoxicillin per dose, given every 8-12 hours.
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 · 18 lb cat
Amoxicillin dose for a 18 lb cat
Low Dose
40.8
mg
Standard
81.6
mg
Max Safe
204.1
mg
Frequency
every 8-12 hours
Weight in kg
8.2 kg
Always confirm with your veterinarian before administering medication. These calculations are estimates based on published veterinary pharmacology references.
Other Weights
Amoxicillin for a different size cat
FAQ · 18 lb cat
Questions about Amoxicillin for a 18 lb cat
How much Amoxicillin for a 18 lb cat?
What is the safe dose range of Amoxicillin for a 18 lb cat?
How often can I give Amoxicillin to a 18 lb cat?
Need a different weight?
Use the calculator on the main Amoxicillin page for any exact weight, or read the full dosage chart and safety information.
Full Amoxicillin 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 Amoxicillin.
Read more about our methodology and how we calculate dosages.