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

Phenytoin is primarily used as an antiepileptic drug, which means it is used to treat epilepsy. Let's understand this in detail:

1. Understanding Epilepsy:
   Epilepsy is a neurological disorder characterized by recurrent seizures. It is caused by abnormal electrical activity in the brain.
2. Role of Phenytoin:
   Phenytoin works by stabilizing the neuronal membrane and suppressing excessive electrical activity in the brain. This helps in preventing seizures, making it an effective treatment for epilepsy.
3. Eliminating Other Options:
   • Hypertension: Phenytoin is not used for treating high blood pressure. Antihypertensive drugs like beta-blockers or ACE inhibitors are typically used for hypertension.
   • Diabetes: This is a metabolic disorder where phenytoin has no role. Diabetes is managed with insulin or oral hypoglycemics.
   • Asthma: Asthma involves airway inflammation and is treated with bronchodilators and anti-inflammatory drugs, not phenytoin.

Therefore, the correct answer is that phenytoin is mainly used in Epilepsy.