INI-CET EXAM -2026
Pharmacology
Easy
Lamotrigine is most effective in which of the following seizure types?
Appeared in: INI-CET EXAM -2026
Explanation
- Lamotrigine is a broad-spectrum antiepileptic drug with proven efficacy against several seizure types.
- Clinical trials have demonstrated its effectiveness in treating primary generalized tonic-clonic seizures, making it a first-line option for this condition.
- It is also approved for focal seizures and seizures associated with Lennox-Gastaut syndrome.
- Its mechanism involves blocking sodium channels, which stabilizes neuronal membranes and prevents the rapid and repetitive firing of neurons that leads to tonic-clonic activity.
Why Other Options Were Wrong
- Option A: While lamotrigine has activity against absence seizures, it is not considered the most effective or first-line treatment.
- Option C: Lamotrigine is effective for atonic seizures, particularly as an adjunctive treatment in Lennox-Gastaut syndrome, but its primary indication and highest efficacy are recognized in tonic-clonic and focal seizures.
- Option D: Lamotrigine is generally contraindicated or used with extreme caution in patients with myoclonic seizures because it can paradoxically worsen them.
Related Visual
Clinical Relevance
- Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Pharmacology and Seizure Management as background academic context rather than a clinical decision trigger.
- A critical nursing role is patient education on medication adherence and recognizing adverse effects. For lamotrigine, the most serious is a life-threatening rash (SJS/TEN), which requires immediate medical attention.
- Nurses must emphasize that the dose must be increased slowly (titrated) as prescribed to minimize the risk of severe rash. Any deviation should be reported.
- What if? If a patient on lamotrigine for tonic-clonic seizures develops a new, unexplained rash, the nurse's priority is to instruct the patient to stop the medication and contact their provider immediately or go to an emergency room.
How to Approach the Question
- First, identify the core of the question: It asks for the seizure type where lamotrigine is 'most effective'. This implies comparing its efficacy across different conditions.
- Recall the classification of antiepileptic drugs. Lamotrigine is a broad-spectrum agent, but its primary uses are key.
- Evaluate each option based on your knowledge of pharmacology:
- Absence seizures: Recall that ethosuximide is the classic first-line drug.
- Tonic-clonic seizures: Recognize this as a primary indication for lamotrigine.
- Atonic seizures: Remember this is part of Lennox-Gastaut syndrome, where lamotrigine is used, but perhaps not as a standalone first choice.
Concept Tested & Keywords
- Concept Tested: Pharmacology and Seizure Management
- Stem keywords: Lamotrigine, seizure types, most effective
- Lead-in keywords: most effective
Question ID
QyYgAj1Y42jolQnEa9ghUO
Reference Book
E6 Pharmacology Katzung 16e p. 655-657
E6 Robert Boland, Marcia L. Verduin - Kaplan and Sadock's Comprehensive Text of Psychiatry-Wolters Kluwer Health (2024) (pp 1-16525 of 16525) p. 10688-10690
Practise the full INI-CET EXAM -2026
Attempt every question from this paper in a timed mock, then review the full solution for each one.
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