Seizures are treated with __________.

• A. Barbiturates
• B. Benzodiazepines
• C. Hydantoins
• D. Succinimides

Answer: (C)

The idea being tested is how anticonvulsants calm brain activity by stabilizing neuron firing. A hydantoin, such as phenytoin, works by blocking voltage-gated sodium channels in neurons. This reduces the excitability of neuronal membranes and helps prevent the rapid, repetitive firing that leads to seizures, making it effective for a broad range of seizure types and a common choice for long-term control. Other options have more specific or acute roles: benzodiazepines and barbiturates are often used for immediate seizure control rather than maintenance therapy, and succinimides are mainly used for absence seizures. So the hydantoins are the best fit for treating seizures in a general, ongoing sense.