Doxycycline Dosage Calculator for Cats
Calculate the appropriate doxycycline dosage for cats based on weight, condition severity, and medication form. This tool helps ensure accurate dosing for effective treatment while minimizing side effects.
How to Use This Calculator
- Enter your cat's accurate weight in kilograms
- Select the form of doxycycline you're using (tablet or liquid with concentration)
- Choose the severity of the condition being treated
- Set the treatment duration as recommended by your veterinarian
- Select how often you'll administer the medication
- Adjust kidney function slider if known (affects dosage recommendations)
Formula Used
Dosage per Administration (mg) = Cat Weight (kg) × Dosage Rate (mg/kg)
Where:
- Dosage Rate = 5 mg/kg for mild infections, 7.5 mg/kg for moderate infections, 10 mg/kg for severe infections
- Tablet Amount = Dosage per Administration (mg) ÷ Tablet Strength (mg)
- Liquid Volume (ml) = Dosage per Administration (mg) ÷ Liquid Concentration (mg/ml)
- Kidney Function Adjustment: Reduce dosage by 25% for mildly reduced function, 50% for impaired function
Example Calculation
Real-World Scenario:
A veterinarian needs to calculate the doxycycline dosage for a 4.5 kg adult cat with a moderate respiratory infection using 50mg tablets administered twice daily for 14 days.
Given:
- Cat Weight = 4.5 kg
- Condition Severity = Moderate infection
- Medication Form = 50mg tablets
- Administration Frequency = Every 12 hours
Calculation:
Dosage per Administration = 4.5 kg × 7.5 mg/kg = 33.75 mg
Tablet Amount = 33.75 mg ÷ 50 mg = 0.675 tablets per dose
Result: Administer approximately 2/3 of a 50mg doxycycline tablet every 12 hours for 14 days.
Why This Calculation Matters
Practical Applications
- Prevents under-dosing which can lead to antibiotic resistance
- Avoids over-dosing which can cause serious side effects
- Helps pet owners accurately administer medication at home
- Provides guidance for compounding pharmacies
Key Benefits
- Reduces calculation errors that could harm the cat
- Adjusts for individual patient factors like kidney function
- Provides clear instructions for different medication forms
- Helps ensure treatment compliance and completion
Common Mistakes & Tips
Frequently Asked Questions
References & Disclaimer
Medical Disclaimer
This calculator provides dosage recommendations based on standard veterinary guidelines. It is not a substitute for professional veterinary advice. Always consult with a licensed veterinarian before administering any medication to your cat. The user assumes full responsibility for the use of this information and any resulting treatment decisions.
References
- Plumb's Veterinary Drug Handbook - Comprehensive guide to veterinary medications including doxycycline dosage guidelines
- Journal of the American Veterinary Medical Association - Doxycycline Pharmacokinetics in Cats - Scientific study on doxycycline absorption and elimination in feline patients
- Merck Veterinary Manual - Feline Respiratory Disease Treatment - Guidelines for treating respiratory infections in cats including antibiotic selection
Accuracy Notice
This calculator provides estimates based on standard dosage recommendations. Actual dosage may vary based on individual cat health status, specific condition being treated, and other factors. Always verify calculations with a veterinarian and follow prescription instructions precisely. The calculator is not responsible for treatment outcomes resulting from the use of this information.
About the Author
Kumaravel Madhavan
Web developer and data researcher creating accurate, easy-to-use calculators across health, finance, education, and construction and more. Works with subject-matter experts to ensure formulas meet trusted standards like WHO, NIH, and ISO.