Actual Examples Dose Calculation

28.10.1 Actual Examples Dose Calculation 1. Label on a container of powdered worm medicine Protection of consumers: Animal should not be slaughtered within seven days and milk should not be used for human consumption within 24 hours of feeding the medicine.

Route: Drenching for cattle, sheep and goat; mix with food for pig; mix with water for poultry.

M.F.G: May 94.

Expiry: 48 months after the M.F.G. date.

Recommended dosage: 45 mg/kg l.w. for cattle, sheep, goat and pig.

For Poultry: Dissolve 10 gram of powder in 4 liter of water for 100 birds.

Maximum doses for cattle and sheep: 15 grams for cattle; 2 grams for sheep and goats Species: Cattle, sheep/goat/pig/poultry.

Using the information on the label:

For a 30 kg goat:

45 mg/kg X 30 kg = 1350 mg = 1.35 gm For a 50 kg goat:

45 mg/kg X 50 kg = 2250 mg = 2.25 gm However, the maximum dose is 2 gm! Therefore we can give only 2.0 gram to the 50 kg goat.

2. Giving a tetracycline injection:

Dosage on label or in textbook: 4 mg/kg for IM injection Weight of a buffalo that needs the medicine: 400kg Calculation: 4 mg/kg x 400 kg = 1,600 mg medicine for the 400 kg buffalo But the tetracycline is in liquid form, therefore the following calculation is needed using the strength of the medicine.

Strength of tetracycline (from bottle): 50 mg/ml Calculation: 1,600 mg X 1 ml/50 mg = 32 ml for a 400 kg buffalo Therefore, give the 400 kg buffalo an IM injection of 32 ml of tetracycline.