Malignant neuroleptic syndrome is caused by: March 2009
## **Core Concept**
Malignant neuroleptic syndrome, also known as Neuroleptic Malignant Syndrome (NMS), is a life-threatening neurological disorder most often caused by an adverse reaction to neuroleptic or antipsychotic medication. It is characterized by fever, muscle rigidity, altered mental status, and autonomic dysfunction. The condition requires immediate medical attention.
## **Why the Correct Answer is Right**
The correct answer, , is right because Neuroleptic Malignant Syndrome (NMS) is primarily associated with the use of antipsychotic drugs, which are also known as neuroleptics. These drugs can cause a blockade of dopamine receptors in the brain, leading to the clinical manifestations of NMS. The blockade of dopamine D2 receptors is particularly implicated in the pathophysiology of NMS.
## **Why Each Wrong Option is Incorrect**
- **Option A:** - This option is incorrect because while can have various side effects, it is not specifically identified as a cause of malignant neuroleptic syndrome in the way that antipsychotics are.
- **Option B:** - This option is incorrect as there is no commonly recognized association with malignant neuroleptic syndrome.
- **Option C:** - This option is incorrect because, similar to option A, does not have a well-established link to causing NMS.
## **Clinical Pearl / High-Yield Fact**
A key clinical pearl is that NMS can be triggered not only by the initiation of antipsychotic medication but also by the rapid increase in dosage or the switch from one antipsychotic to another. Early recognition is crucial, and treatment involves immediate discontinuation of the offending antipsychotic medication and supportive care.
## **Correct Answer:** .