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Methods for Calculating Dosage of Commonly Used Veterinary Drugs
Release time:
2024-05-28
In the process of calculating the dosage of veterinary drugs, we must first find out the weight and capacity of the drug content, and the conversion between international units and milligrams. Do not confuse them. The following examples are given.
1. A pig farmer uses ciprofloxacin to treat pig diarrhea. Ciprofloxacin injection is used at a dose of 2.5 mg/kg body weight, with a drug specification content of 2.5 and 10 ml (including 0.25g). For a 55kg pig, the dosage required is 2.5 × 55=152.5 mg. The ciprofloxacin content in the injection was calculated to be 25 mg/ml, and the volume of the injection required for 152.5 mg of ciprofloxacin was calculated to be 152.5/25=6.1 ml. A 55kg pig should be injected with 6.1 ml of ciprofloxacin.
2. A chicken farmer used 10% florfenicol powder in the treatment of coliform liver disease. It is known that 100 grams are mixed with 200 kilograms of feed. For example, if 500 chickens have a feed intake of 0.25 kilograms, the weight of the drug required according to the instructions is 500 × 0.25 × 100/200=62.5 grams. That is, 62.5g of 10% florfenicol is fully mixed with 125kg of feed and fed directly. According to the instructions, 200kg of feed can also be mixed directly with 100g of medicine.
3. A pig farmer uses peracetic acid solution for disinfection of piggery. Generally, the concentration of peracetic acid is 0.3~0.5, while the concentration of peracetic acid sold on the market is 20%. Specific preparation method: if the volume of the sprayer is 25 liters, the volume of 100 peracetic acid required to prepare 0.3 percent of the solution is 25 × 0.3 percent = 0.075 liters. The commercially available peracetic acid is 20%, so the volume of 20% peracetic acid required for preparation should be 0.075 × 100/20=0.375 liters. Prepare 0.3% peracetic acid solution, calculate by 25 liters, take 0.375 liters of 20% peracetic acid, and mix evenly with 25 liters of water.
4. Conversion of international units to milligrams. Generally, 1 mg of antibiotics is approximately equal to 1000 units, that is, 10 mg is equal to 10000 units. For example, when treating chicken colibacillosis, gentamicin is used with a specification of 2 ml/branch (including 80000 units). If it is used for drinking water, the dosage is 10 mg/kg body weight, and the content of the preparation is marked as 80000 units. In practice, 10000 units can be converted into 10 mg, and one gentamicin (2 ml contains 80000 units) can be used for drinking water for 8 chickens weighing 1kg.
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