Which statement best describes first generation anticoagulants?

Which statement best describes first generation anticoagulants?

• A. They are single-dose rodenticides
• B. They require multiple days of consumption to achieve a lethal dose
• C. They are non-toxic to rodents
• D. They act by desiccation

Answer: (B)

First-generation anticoagulants work by blocking the recycling of vitamin K, which is needed to produce the clotting factors II, VII, IX, and X. Because the toxin’s effect builds as the rodent continues to feed, a lethal dose is typically reached only after several days of consumption. This accumulation explains why these poisons are described as requiring multiple days of ingestion to kill. They are not single-dose poisons, they are not desiccants, and they are not non-toxic to rodents. The key idea is that their effectiveness depends on repeated feeding to accumulate enough anticoagulant effect to cause fatal internal bleeding.

First-generation anticoagulants work by blocking the recycling of vitamin K, which is needed to produce the clotting factors II, VII, IX, and X. Because the toxin’s effect builds as the rodent continues to feed, a lethal dose is typically reached only after several days of consumption. This accumulation explains why these poisons are described as requiring multiple days of ingestion to kill. They are not single-dose poisons, they are not desiccants, and they are not non-toxic to rodents. The key idea is that their effectiveness depends on repeated feeding to accumulate enough anticoagulant effect to cause fatal internal bleeding.