Drug of choice in complex partial seizure is :
**Core Concept**
Complex partial seizures, also known as focal seizures, are a type of epilepsy characterized by impaired consciousness and focal neurological symptoms. The drug of choice for managing complex partial seizures is a medication that effectively reduces seizure frequency and minimizes side effects.
**Why the Correct Answer is Right**
The drug of choice for complex partial seizures is typically a second-generation anticonvulsant, specifically valproate (valproic acid). Valproate works by inhibiting the release of excitatory neurotransmitters, such as glutamate, and reducing the excitability of neurons. It also has a broad spectrum of activity, making it effective against various types of seizures, including complex partial seizures.
**Why Each Wrong Option is Incorrect**
**Option A:** Carbamazepine is effective for partial seizures but may not be the best choice for complex partial seizures, as it can worsen or precipitate generalized seizures. Additionally, carbamazepine has a narrower spectrum of activity compared to valproate.
**Option B:** Phenytoin is an older anticonvulsant that is effective for tonic-clonic seizures but may not be the best choice for complex partial seizures. Phenytoin can also have significant side effects, such as gingival hyperplasia and hirsutism.
**Option C:** Lamotrigine is a second-generation anticonvulsant that is effective for partial seizures, including complex partial seizures. However, it is typically used as an adjunct therapy rather than a first-line treatment.
**Clinical Pearl / High-Yield Fact**
When choosing an anticonvulsant for complex partial seizures, consider the patient's seizure history, medical history, and potential interactions with other medications. Valproate is often a good starting point due to its broad spectrum of activity and relatively favorable side effect profile.
**Correct Answer: C. Lamotrigine is a second-generation anticonvulsant that is effective for partial seizures, including complex partial seizures. However, it is typically used as an adjunct therapy rather than a first-line treatment.