Which statement is true about treatment after exposure to tetrodotoxin and saxitoxin?

Which statement is true about treatment after exposure to tetrodotoxin and saxitoxin?

• A. There is a specific antidote.
• B. Some antidote exists.
• C. There is no antidote; treatment is supportive/symptomatic only.
• D. Antidotes exist for one but not the other.

Answer: (C)

The key idea is that exposure to tetrodotoxin and saxitoxin is managed with supportive care because there is no antidote for either toxin. Both toxins block voltage-gated sodium channels, which prevents nerve impulses from being conducted and can lead to paralysis, including the muscles needed for breathing. Since there isn’t a chemical that reverses this blockade, the treatment focuses on keeping the patient alive and stable while the toxin wears off. This means ensuring the airway is protected and ventilation is supported, monitoring and supporting blood pressure and circulation, and providing decontamination if the exposure was recent (such as activated charcoal). Therefore, the correct statement is that there is no antidote; treatment is supportive and symptomatic only.

The key idea is that exposure to tetrodotoxin and saxitoxin is managed with supportive care because there is no antidote for either toxin. Both toxins block voltage-gated sodium channels, which prevents nerve impulses from being conducted and can lead to paralysis, including the muscles needed for breathing. Since there isn’t a chemical that reverses this blockade, the treatment focuses on keeping the patient alive and stable while the toxin wears off. This means ensuring the airway is protected and ventilation is supported, monitoring and supporting blood pressure and circulation, and providing decontamination if the exposure was recent (such as activated charcoal). Therefore, the correct statement is that there is no antidote; treatment is supportive and symptomatic only.