This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Substance Related and Addictive Disorders, Subject name: Psychiatry
Magnan phenomenon is associated with which of the following drug use? 
Select and explain. 
A. Cocaine, B. Cannabis, C. Alcohol, D. Tobacco
A: Cocaine
Answer: A: Cocaine 
Explanation: Magnan phenomenon is another name for cocaine bugs, which are tactile hallucinations where in a patient who is intoxicated with cocaine feels as if small insects are crawling under the skin Cocaine Bugs It occurs as a pa of cocaine induced psychotic disorder Here the patient will have sensations of bugs crawling beneath the skin which is known as formication