Veterinary Drugs

What are Veterinary Drugs?

In modern agricultural practices, veterinary drugs are being used on a large scale. The majority of these drugs are administered as feed additives or via drinking water to prevent the outbreak of diseases or to improve the growth of animals.

The use of veterinary drugs for food-producing animals such as poultry, lactating cows, etc. can affect public health and the international trade of food products because of the presence of residues of drugs in edible products (milk, eggs, body tissue after slaughtering).

Depending upon the period between the administration of the drug and the collection of the animal product (withdrawal period), drug-related residues may be present in these products.

FDA laboratories have the technical capabilities to test for these residues in various matrices. All sub-sampling, testing, and laboratory analysis are performed according to specialized international standards.


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General Capabilities

  • Multi-residue analysis of veterinary drugs
  • Residue analysis of single actives
  • Therapeutic levels of veterinary drugs
  • Bioequivalence studies for veterinary drugs
  • Regulatory compliance testing of veterinary drugs

Relevant Matrices

  • Meat – kidney, liver, muscle and fat
  • Meat products
  • Eggs and egg products
  • Honey
  • Milk and milk products
  • Serum
  • Finished products

Equipment and Processes

  • HPLC
  • LC-MS/MS
  • GC-TOF (MS)


Examples of Veterinary Drug Residues




Chloramphenicols derivatives

Non-Steroidal Anti-Inflammatory Drugs

Other Antibiotics

Xenobiotic Hormones






Growth stimulants