🔧 Dosage Vétérinaire

Calculate accurate medication dosage by body weight, drinking water, or feed mixing for livestock and poultry.

Calculate accurate medication dosage by body weight, drinking water, or feed mixing for livestock and poultry. Input administration route, animal type, body weight, number of animals, label dosage, drug active content, frequency, duration, and daily water/feed intake. Get per-dose and total-course amounts.

You treated 500 layers for respiratory infection with oxytetracycline in drinking water. The label said 400 mg/L, but you used 400 mg per gallon (3.785 L) — 3.8 times too strong. Birds stopped drinking due to bitter taste, became dehydrated, and 25 died. The survivors had kidney damage from overdose. You meant well, but unit confusion (mg/L vs mg/gallon) caused a disaster. Always confirm the unit: per kg body weight, per liter of water, or per kg of feed. And always calculate the total amount for the entire course before starting.

📊 Results

Active Ingredient Dose-
Product per Dose / Liter-
Per Dose Total-
Daily Total-
Course Total-
In kg / Note-

About Veterinary Dosage Calculation

Accurate dosing ensures effective treatment while avoiding toxicity, residue violations, and antimicrobial resistance. Always follow label and veterinary advice.

Administration Methods

  • By body weight: Most accurate. mg drug per kg body weight.
  • In drinking water: Convenient for flock/herd. Calculate from actual water consumption.
  • In feed: Good for long-term medication. Must be uniformly mixed.
  • Injection: IM, IV, SQ — fastest, for individual severe cases.

Critical Safety Rules

  • Active vs product: divide by drug concentration to get product amount
  • Accurate weights: weigh animals — don't guess
  • Withdrawal periods: strictly observe pre-slaughter withdrawal
  • Don't double dose: "loading dose" only for specific drugs per label
  • Record everything: drug, batch, dose, date, animals treated

Disclaimer: For reference only. Always consult a licensed veterinarian for diagnosis and treatment.

Frequently Asked Questions

Q: What is the difference between active ingredient and product amount?

A: Active ingredient (AI): the chemical that has the therapeutic effect (e.g., oxytetracycline HCl). Product: the commercial formulation containing AI plus carriers, flavorings, stabilizers (e.g., a 20% oxytetracycline soluble powder). Label dosage usually specifies AI (e.g., 20 mg/kg body weight). To get product amount: divide AI dose by product concentration. Example: 20 mg/kg AI ÷ 20% = 100 mg/kg product. Always check the product label for active ingredient percentage — 5%, 10%, 20%, 50% products all exist for the same drug.

Q: What are withdrawal periods and why do they matter?

A: Withdrawal period: the time between last medication and when animal products (meat, milk, eggs) can be safely consumed. During withdrawal, drug residues are above safe limits. Violating withdrawal periods can cause: antibiotic residues in food, human health risks (allergies, antibiotic resistance), legal penalties (fines, loss of license), and market access restrictions. Always follow label withdrawal periods. For extra-label use (veterinarian prescribed), the veterinarian must specify a longer withdrawal period. Record all treatments: drug, dose, date, animal ID, withdrawal end date.

Q: Can I use human medications for animals?

A: Only under veterinary supervision (extra-label drug use). Many human drugs are safe for animals at adjusted doses, but some are toxic: acetaminophen (Tylenol) is deadly to cats, ibuprofen causes kidney failure in dogs, chocolate/theobromine is toxic to dogs and cats. Antibiotics designed for humans may have different pharmacokinetics in animals. Using human drugs without veterinary guidance risks: incorrect dose, adverse reactions, drug residues, and legal liability. Always consult a veterinarian. In many countries, extra-label use of certain antibiotics (medically important) in food animals is restricted or banned.