A compound X decreases the functional activities of several CNS neurotransmitters including dopamine, adrenaline, and serotonin. At high doses, it may cause Parkinsonism like extrapyramidal system dysfunction. Which of the following can be X
**Core Concept**
The question is testing the student's knowledge of a class of medications that can cause extrapyramidal side effects by affecting the central nervous system (CNS) neurotransmitters. This class of medications is known as antipsychotics, specifically the typical antipsychotics.
**Why the Correct Answer is Right**
Compound X is likely a typical antipsychotic that blocks dopamine receptors in the CNS, leading to a decrease in functional activities of several neurotransmitters, including dopamine, adrenaline, and serotonin. This blockade of dopamine receptors can cause Parkinsonism-like extrapyramidal system dysfunction at high doses. Typical antipsychotics work by blocking D2 receptors in the mesolimbic pathway, which is involved in the regulation of mood and motivation.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a particular class of medications that is known to cause extrapyramidal side effects. While some medications may have this effect, it is not a specific enough answer.
* **Option B:** This option is incorrect because it is a class of medications that is known to increase the functional activities of several CNS neurotransmitters, including dopamine and serotonin, rather than decrease them.
* **Option C:** This option is incorrect because it is a class of medications that is not commonly associated with extrapyramidal side effects.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that antipsychotics, particularly typical antipsychotics, can cause extrapyramidal side effects by blocking dopamine receptors in the CNS. This can lead to Parkinsonism-like symptoms, such as tremors and rigidity, especially at high doses.
**Correct Answer:** D. Haloperidol is a typical antipsychotic that is known to cause extrapyramidal side effects by blocking dopamine receptors in the CNS.