Calculadora de Dose de Cephalexin para Cães
- Created by
- Renato Passos, Eng. de Software
- Reviewed by
- Renato Passos, Eng. de Software
Last updated: Apr 18, 2026
Formula
dose = peso_kg × 22 mg; a cada 8–12 h
About this calculator
This calculator helps pet owners estimate the dose of cephalexin, a cephalosporin antibiotic, based on the dog's weight. The recommended dose is 22 mg per kilogram of body weight, administered every 8 to 12 hours. The tool calculates the total amount per dose and provides a reminder about frequency. Remember, this is only a guide and does not replace veterinary evaluation.
The formula is simple: multiply the dog's weight (in kg) by 22 mg. For example, a 10 kg dog would receive 220 mg per dose. The suggested frequency is every 8 to 12 hours, depending on infection severity and veterinary advice. The calculator also displays the maximum safe dose based on weight, preventing common calculation errors.
Use this calculator when your veterinarian prescribes cephalexin and you need to confirm the correct dose for your dog's weight. It is helpful for owners administering the medication at home, ensuring accuracy. However, never start treatment without professional guidance, as the dose may vary based on clinical condition, kidney function, and other factors.
Important precautions: do not use in dogs allergic to cephalosporins or penicillins. The dose may need adjustment in animals with kidney insufficiency. Strictly follow the interval between doses and complete the prescribed course, even if the dog improves. If in doubt, consult your veterinarian immediately.
Frequently asked questions
Can I give cephalexin to my dog without a veterinary prescription?
No. Cephalexin is an antibiotic that requires a veterinary prescription. Improper use can lead to bacterial resistance or side effects. Always consult a veterinarian before administering.
What should I do if I miss a dose?
Give the dose as soon as you remember, unless it is almost time for the next dose. In that case, skip the missed dose and continue the regular schedule. Do not double the dose.
What are common side effects of cephalexin in dogs?
The most common are gastrointestinal issues like vomiting, diarrhea, and loss of appetite. If symptoms are severe or persistent, contact your veterinarian.
Is the dose the same for all infections?
No. Although the standard dose is 22 mg/kg every 8-12 hours, the veterinarian may adjust it based on the type and severity of the infection and the dog's overall health.
Can I use this calculator for cats?
No. This calculator is specific to dogs. Cats have different metabolism and require different doses. Consult a veterinarian for medicating felines.