Hallucinations hallucinogenic drugs

The term psychotomimetic was coined to compare the effects of hallucinogens to the symptoms of schizophrenia and other psychotic conditions. However, the effects produced by hallucinogens and mental illness are qualitatively different. While drug-induced hallucinations tend to be more visual, auditory hallucinations are most common in schizophrenia. The hallucinogenic drugs discussed here may induce positive symptoms (e.g., hallucinations), but do not induce the negative symptoms (e.g., cognitive deficits, social withdrawal) of schizophrenia. 

Other hallucinogenic drugs including substances related to LSD are mentioned under delirium. Phencyclidine and ketamine can also produce similar hallucinatory states without delirium including time distortion, distortion of body image, synaesthesia, visual hallucinations, depersonalisation, derealisation, paranoid ideation and a schizophreniform psychosis which includes the negative symptoms of schizophrenia (Gorelick Balster, 1995). 

Precautions A hallucinogenic drug. Moderately toxic by swallowing. Poison by intravenous route. Effects on the body by intramuscular route are hallucinations and distorted perceptions. 

Hallucinogen A drug that disturbs sensory perception. Visual hallucinations are the most common effect of the psychedelic drug LSD. In contrast, auditory hallucinations predominate in schizophrenia. 

As mentioned herein, other neurotransmitters are affected by hallucinogens. Accordingly, the opposite changes in 5-HT and DA neurotransmission produced by these drugs seem necessary but insufficient to evoke hallucinations. Current studies on the effects of hallucinogens on recently detected neuroactive com-... 

A critical question to ask at this juncture is whether any of these behavioral changes in animals is relevant to the hallucinogenic effects of this class of drugs in humans. In other words, which if any of these animal behaviors might closely model human hallucinations To answer this question, one must examine the... 

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