True or False: A drug that is safe in one species is safe in all species.

The statement that a drug safe in one species is safe in all species is false. Different species can exhibit vastly different metabolic pathways, physiological responses, and sensitivities to various compounds. This means that a drug that has been proven safe and effective in one animal species might not have the same safety profile in another species due to variations in absorption, distribution, metabolism, and excretion processes.

For example, a medication that works well in dogs might cause adverse effects in cats due to differences in liver enzyme activity, which is responsible for metabolizing many drugs. Consequently, it's crucial to conduct species-specific research and trials to ensure the safety and effectiveness of any drug before it is administered across different species.

This understanding reinforces the need for thorough testing and careful consideration of veterinary drugs within the scope of species variation, confirming that the original assertion regarding drug safety in different species is incorrect.