Which of the following addiction shows characteristic ‘Magnan’s symptom’?
**Core Concept**
Magnan's symptom is a clinical feature of chronic cocaine addiction, characterized by the tactile hallucination of feeling insects, worms, or other small objects crawling under the skin. This phenomenon is a result of the intense psychological distress and anxiety associated with cocaine withdrawal.
**Why the Correct Answer is Right**
Cocaine addiction leads to increased dopamine release and subsequent depletion of dopamine receptors in the brain. During withdrawal, individuals experience anxiety, paranoia, and hallucinations due to the disruption of normal neural activity. Magnan's symptom is a manifestation of this neural dysregulation, where the brain's attempt to cope with stress creates tactile hallucinations.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as it does not specifically relate to the characteristic tactile hallucinations of cocaine withdrawal.
* **Option B:** This option is incorrect as it is not a known symptom of addiction.
* **Option C:** This option is incorrect as it is a different type of hallucination not related to the tactile sensations described in Magnan's symptom.
**Clinical Pearl / High-Yield Fact**
Magnan's symptom is a classic example of a "formication" hallucination, which is a tactile hallucination that can be seen in various psychiatric and neurological conditions, including cocaine addiction, schizophrenia, and delirium tremens.
**Correct Answer:** C.