Question

Phenytoin is mainly used in _______

• A. Hypertension
• B. Epilepsy
• C. Diabetes
• D. Asthma

Hint:

Phenytoin is an antiepileptic drug that acts mainly by blocking sodium channels.

Answer 1

The Correct Option is B

Concept:
Phenytoin is an antiepileptic drug used to control seizures.

Step 1: Epilepsy is a disorder characterized by recurrent seizures.

Step 2: Phenytoin stabilizes neuronal membranes.

Step 3: It mainly blocks voltage-gated sodium channels.

Step 4: This reduces abnormal repetitive firing of neurons.

Step 5: Therefore, phenytoin is mainly used in epilepsy. \[ \boxed{\text{Epilepsy}} \]