Psychotomimetic

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A drug with psychotomimetic (also known as psychotogenic) actions mimics the symptoms of psychosis, including delusions and/or delirium, as opposed to just hallucinations. Psychotomimesis is the onset of psychotic symptoms following the administration of such a drug.


Some drugs of the opioid class have psychotomimetic effects. Particularly, mixed kappa receptor agonist mu receptor antagonist opioid analgesics can cause dose-related psychotomimesis.[1] This adverse effect, incidence 1–2%, limits their use. Pentazocine and butorphanol fall under this opioid class.[2]


There is evidence that cannabinoids are psychotomimetic,[3] especially delta-9-tetrahydrocannabinol (THC). D'Souza et al. (2004) found that intravenous THC produced effects that resemble schizophrenia in both the positive symptoms (illusions, paranoia and disorganized thinking) and negative symptoms (apathy, anhedonia, alogia, asociality, avolition).[4] Some types of cannabis may be more psychotomimetic than others, probably due to the action of cannabidiol (CBD), which inhibits P450 3A11's metabolic conversion of THC to 11-hydroxy-THC, which is four times more psychoactive.[5]p. 39


Carl Sagan used the word "psychotomimetic" in his anonymous article "Mr.X"[6] to describe the effects of cannabis, writing that "I smile, or sometimes even laugh out loud at the pictures on the insides of my eyelids. In this sense, I suppose cannabis is psychotomimetic, but I find none of the panic or terror that accompanies some psychoses."



See also


  • Amphetamine

  • DXM

  • Hallucinogen

  • Ketamine

  • Neurotransmitter

  • Opioid

  • PCP

  • Psychotherapy

  • Stimulant psychosis


References




  1. ^ Pfeiffer (1986). "Psychotomimesis mediated by kappa opiate receptors". Science. 233 (4765): 774–776. doi:10.1126/science.3016896. PMID 3016896..mw-parser-output cite.citationfont-style:inherit.mw-parser-output qquotes:"""""""'""'".mw-parser-output code.cs1-codecolor:inherit;background:inherit;border:inherit;padding:inherit.mw-parser-output .cs1-lock-free abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-lock-subscription abackground:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registrationcolor:#555.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration spanborder-bottom:1px dotted;cursor:help.mw-parser-output .cs1-hidden-errordisplay:none;font-size:100%.mw-parser-output .cs1-visible-errorfont-size:100%.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-formatfont-size:95%.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-leftpadding-left:0.2em.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-rightpadding-right:0.2em


  2. ^ Musacchio JM (1990). "The psychotomimetic effects of opiates and the sigma receptor". Neuropsychopharmacology. 3 (3): 191–200. PMID 2163646.


  3. ^ Sewell R. A.; Ranganathan M.; D'Souza D. C. (2009). "Cannabinoids and psychosis". International Review of Psychiatry. 21 (2): 152–162. doi:10.1080/09540260902782802. PMID 19367509.


  4. ^ D'Souza DC, Perry E, MacDougall L, Ammerman Y, Cooper T, Wu YT, Braley G, Gueorguieva R, Krystal JH (2004). "The psychotomimetic effects of intravenous delta-9-tetrahydrocannabinol in healthy individuals: implications for psychosis" (PDF). Neuropsychopharmacology. 29 (8): 1558–1572. doi:10.1038/sj.npp.1300496. PMID 15173844.


  5. ^ Brenneisen R. Chemistry and analysis of phytocannabinoids and other Cannabis constituents. In: ElSohly MA (ed). Marijuana and the cannabinoids. Humana Press Inc: Totowa, New Jersey, 2007.


  6. ^ Sagan, Carl. "Mr. X". Marijuana-Uses.com. Retrieved November 8, 2012.







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