Which of the following pieces of information is mandatory to include on a drug label?

Including the drug's strength on a label is essential for ensuring the safe and effective use of the medication. The strength indicates the concentration of the active ingredient, which helps veterinary professionals determine the appropriate dosage for a specific animal based on its size, weight, and health condition. Without this information, there could be a risk of underdosing or overdosing, potentially leading to ineffective treatment or harmful side effects. Clear communication of the drug's strength is crucial for maintaining patient safety and complying with regulatory standards.