Pharmacological characteristics, dosage forms, dosages, and uses and methods of veterinary drugs

The functions and characteristics of veterinary drugs
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The function of veterinary drugs:
Veterinary drugs are medications specifically used for the prevention, treatment, and diagnosis of animal diseases.
(1) Prevention: Medications used to prevent the occurrence of certain animal diseases, such as various vaccines and animal health supplements.
(2) Therapeutics: Medications used to treat various animal diseases, such as various antibiotics, etc.
(3) Diagnostics: Drugs used to identify animal diseases, such as various diagnostic solutions and diagnostic agents.
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Characteristics of veterinary drugs
(1) The packaging, dosage, and route and method of administration of veterinary drugs are all tailored to the specific characteristics of the animals themselves. For example, veterinary drug packaging often comes in larger sizes, and some dosage forms can even be administered via feed.
(2) The use of veterinary drugs is strictly limited to specific target species. For example: Ruminants are relatively sensitive to certain anesthetics; cattle exhibit very low tolerance to mercury-based preparations; furan compounds easily cause poisoning in poultry; and the use of antibiotics in herbivorous animals can readily lead to digestive dysfunction, and so forth.
(3) Veterinary drugs are excreted relatively quickly from the animal body.
(4) Veterinary drugs are not intended for human use. The formulations, manufacturing processes, quality control procedures, and dosage and administration guidelines of veterinary drugs are all designed specifically for animals and are therefore unsuitable for humans. If used in humans, they could lead to adverse effects.
02 Dosage Forms and Dosages of Veterinary Medicines
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Dosage forms of veterinary drugs refer to the forms into which active pharmaceutical ingredients are processed appropriately to ensure safety, stability, and ease of use.
(1) Common dosage forms include liquid formulations (injections, solutions, etc.), semi-solid formulations (ointments, extracts, etc.), and solid formulations (premixes, soluble powders, tablets, granules, capsules, lickable blocks, etc.).
(2) New dosage forms for veterinary use include pour-on and spray formulations (levamisole pour-on and piglet anti-diarrheal spray), as well as microcapsules (antibiotic suppositories).
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Dosage of veterinary drugs
The dosage of a drug refers to the amount of medication administered that elicits a specific response in the body; typically, it represents the dose used for the prevention and treatment of diseases. Drug dosage is a critical factor determining the efficacy of a medication. If the dosage is too low, the desired therapeutic effect cannot be achieved. Within a certain range, the greater the dosage, the stronger the effect will be. However, if the dosage exceeds a certain threshold, the nature of the drug's action may undergo a qualitative change, potentially causing varying degrees of toxicity or even death in the organism.
Common dosage units: For solid and semisolid dosage forms, the common dosage units are grams (g) or milligrams (mg), with dosages typically expressed as mass per kilogram; for liquid dosage forms, the common dosage unit is milliliters (ml), often expressed as mg/kg or mg/L (ppm); for antibiotics, hormones, and vitamins, the common dosage units are units (U) or international units (IU).
03 Uses and Dosage of Veterinary Drugs
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The main uses of veterinary drugs include:
(1) Prevent and control diseases, and improve animal health levels.
(2) Used as a feed additive to promote growth, improve feed conversion efficiency and animal growth rate, and reduce production costs.
(3) Used for synchronized estrus to control the reproductive cycle, improve litter size and offspring weight, and enhance reproductive performance.
(4) Enhance feed palatability, improve carcass quality, and enhance the taste of animal-based foods for human consumption, thereby providing livestock products that are popular with consumers and reducing consumers’ food expenditures.