<prompt> Formication and delusion of persecution occurs together in aEURCocaineAmphetamineCannabisLSD  <response>: Cocaine psychosis Ref. Nimboodiri 3e p. 334; Essentials of clinical psychiatry 4e p. 580 This question is tricky one as tactile hallucination fornication and delusion of persecution are seen both in cocaine as well as amphetamine abuse. Read the question carefully, examinor has asked about the presence of formication and delusion of persecution together. In amphetamine abuse these two do not occur together - Fornication tactile hallucination is seen in Chronic abuse. - Paranoid ideation delusion of persecution Acute intoxication. occurs in On the other hand both delusion of persecution and formication are seen together in chronic cocaine abuse. Cocaine abuse can present with auditory hallucinations, tactile hallucination including fornication andparanoid delusion delusion of persecution. -BK Puri 3e 356 