What is the desired action of phenytoin sodium (Dilantin)?

Phenytoin sodium, commonly known as Dilantin, is primarily classified as an anticonvulsant medication. Its main action is to prevent and control seizures, particularly in individuals with conditions such as epilepsy. By stabilizing electrical activity in the brain, phenytoin decreases the frequency of seizure activity and helps maintain a more stable neural environment, which is crucial for patients experiencing various forms of seizures.

While the other classifications describe different types of medications, they do not align with the primary function of phenytoin. Hypnotic medications are typically used to induce sleep; antihypertensives are aimed at lowering blood pressure; and medications used to reduce fever target fever management. None of these functions relate to the anticonvulsant properties of phenytoin sodium, which underscores why the correct choice is the classification of this medication as an anticonvulsant.