<prompt> Tactile hallucination seen in abuse with ?HeroineCocaineCannabisAlcohol  <response>: Ans. is b i.e., Cocaine Magnans symptoms is tactile hallucination formication i.e. feeling of bugs crawling under the skin is seen with cocaine abuse poisoning. Cocaine Cocaine is an alkaloid derived from the Coca bush, Erythrexylum CoCa. It was the first local anaesthetic which was used clinically. Toxicity of cocaine may be : ? A Acute toxicity : - Acute cocaine intoxication is characterized by : ? 1 Sympathetic hyperactivity : - Tachycardia, hypeension, mydriasis, sweating, nausea vomiting. 2 Hypomanic state : - Increased psychomotor activity, grandiosity, elation, hypervigilance, Increased speech output. B Chronic overuse : - Chronic overuse can cause : ? 1 Psychotic episodes Cocaine psychosis : - Persecutory delusions with tactile hallucinations formination. Tactile hallucinations are manifested as bugs crawling under the skin - Cocaine bugs or magnans symptoms. 2 Other : - Anxiety reaction, compulsive behavior, delirium and delusional disorders. 3 Black pigmentation of tongue and teeth A combination of cocaine and heroin taken by injection is called speed ball. 