Det plejede at være ret så sort-hvidt for en række år siden. Der er dog efterhånden dukket nogen resultater op, der har gjort disse spørgsmål sådan lidt "på den ene side, men på den anden side". Nedenfor er et link fra NORML, men man kan sagtens selv finde flere lignende artikler.
Rocker-versionen er at ja, hash forøger antallet af psykotiske episoder for den skizofrene person, men der er øjensynligt også nogen kognitive fordele for disse brugere.
Man er næppe til bunds i denne sag, men det undrer mig ikke helt vildt. Det kommer igen an på motiverne, man tillægger de psykotiske/skizofrene og deres hashforbrug. Der er nok en tradition - som ved heroinbrugerne - til fuldstændig at afvise deres forbrug som en art "falsk bevidsthed" eller blot "dumhed". De kognitive forbedringer hos de skizofrene kunne meget vel forklare deres paradoksale/dumme forbrug af hash trods de meget velkendte bivirkninger.
Ikke at jeg anbefaler at man ryger hash som skizofrem. Det er stadig risikabel adfærd, da den forskning jeg refererer til stadig har noget vej til mere håndfaste konklusioner.
http://norml.org/index.cfm?Group_ID=7267 (NORML's artikel indeholder links til diverse studier.)
Citat:
May 17, 2007 - Berlin, Germany
Berlin, Germany: Cannabis use is associated with improved cognition in schizophrenic patients, according to clinical trial data to be published in the journal Progress in Neuro-Psychopharmacology & Biological Psychiatry.
Investigators at the University of Berlin assessed the impact of cannabis on cognitive functions in schizophrenic patients who reported prior use of pot versus patients who reported no history of substance abuse. Researchers reported that cannabis use was not associated with any decline in cognition, and that those subjects who reported using marijuana prior to their first psychotic episode showed improved cognitive performance on certain tests compared to non-users.
"[T]o our surprise, cannabis abusing schizophrenic patients … achieved results either similar to those [achieved] by the non-using cannabis schizophrenic patients or, at times, performed even better than them," investigators concluded. "[R]ather than deteriorating neuropsychological performance, cannabis [use] prior to [a patient’s] first psychotic episode improved cognition in some tests."
According to the study’s authors, cognitive dysfunctions are present in more than 80 percent of patients diagnosed with schizophrenia.
A separate 2005 study by investigators at Manchester Metropolitan University in Britain previously reported that schizophrenic patients who consumed cannabis prior to disease onset possessed greater cognitive skills after ten years than did non-users.
Neurocognitive studies performed on healthy volunteers generally report that the use of marijuana, even long-term, is not associated with any significant or long-lasting declines in cognitive function.
For more information, please contact Paul Armentano, NORML Senior Policy Analyst, at:
paul@norml.org. Full text of the study, "Cannabis induces different cognitive changes in schizophrenic patients and in healthy controls," will appear in a forthcoming issue of Progress in Neuro-Psychopharmacology & Biological Psychiatry.
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