Cephalexin Dosage Calculator for Dogs
Calculate precise canine Cephalexin antibiotic dosages in milligrams (mg), capsule strength, or liquid oral suspension (mL).
Input Parameters
Enter weight and formulation strength.
Recommended Single Dose
Complete Full Course
Always complete the full antibiotic treatment duration prescribed by your vet, even if skin lesions improve early, to prevent resistant superinfections.
Canine Cephalexin Weight-Based Dosing Table
| Dog Weight (lbs / kg) | Target Dose Range (mg) | Recommended Capsule | Liquid Dose (250mg/5mL) |
|---|---|---|---|
| 10 lbs (4.5 kg) | 100 – 150 mg | Use Liquid Suspension | 2.5 mL |
| 22 lbs (10.0 kg) | 220 – 300 mg | One 250 mg Capsule | 5.0 mL |
| 45 lbs (20.4 kg) | 450 – 600 mg | One 500 mg Capsule | 10.0 mL |
| 65 lbs (29.5 kg) | 650 – 850 mg | One 750 mg Capsule | 15.0 mL |
| 90 lbs (40.8 kg) | 900 – 1200 mg | Two 500 mg Capsules | 20.0 mL |
Calculation Methodology & Biological Principles
Antibiotic Dosing Equation
Cephalexin disrupts bacterial cell wall peptidoglycan synthesis, causing lysis of susceptible Gram-positive Staphylococcus bacteria.
Veterinary Warning
Do not use in dogs with known penicillin or cephalosporin allergies. Consult your veterinarian for exact therapeutic plans.
Frequently Asked Questions
What is Cephalexin used for in dogs? ▼
Cephalexin (Keflex) is a broad-spectrum oral beta-lactam cephalosporin antibiotic prescribed by veterinarians to treat canine bacterial skin infections (pyoderma), urinary tt infections (UTIs), and bone/wound infections.
What is the standard veterinary dosage of Cephalexin for dogs? ▼
The standard veterinary recommended dosage of Cephalexin for dogs is 10 to 15 mg per pound of body weight (approx 22 to 30 mg/kg) administered orally every 8 to 12 hours.
Should Cephalexin be given with food? ▼
Yes, administering Cephalexin with a small meal or snack helps prevent gastrointestinal upset such as nausea or vomiting.