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British Study Doubts Marijuana Causes 'schizophrenia-like psychosis'
05-13-07|BB News

British scientists analysed symptoms of 757 subjects, who developed schizophrenia, of whom 182 (24 per cent) had used cannabis in the year prior to first presentation to a psychiatrist due to the disease. There were no significant differences in the symptoms between cannabis users and non-users that have been observed in some small studies. In addition, cannabis users who developed schizophrenia had no greater family history of schizophrenia. The authors concluded that this "argues against a distinct schizophrenia-like psychosis caused by cannabis."

(Source: Boydell J, et al. Schizophr Res 2007 Apr 24; [Electronic publication ahead of print])

Pancreatitis

Researchers of the University of Heidelberg, Germany, found that patients with acute inflammation of the pancreas (pancreatitis) showed elevated levels of cannabinoid receptors and endocannabinoids in the pancreas. In studies with mice with pancreatitis a cannabinoid that as THC binds to CB1 and CB2 receptors reduced pain and inflammation of the disease.

(Source: Michalski CW, et al. Gastroenterology 2007;132(5):1968-78.)

THC in sweat

In a study with 11 daily cannabis users THC was detectable in the sweat of all subjects above a concentration of 1 ng/ml in the first week after abstinence. In the second week their sweat was positive in eight of eleven subjects and one participant produced THC positive sweat patches for four weeks after abstinence. Daily oral doses of up to 14.8 mg THC caused no positive sweat test above a concentration of 1 ng/ml.

(Source: Huestis MA, et al. Forensic Sci Int 2007 May 2; [Electronic publication ahead of print])

Vomiting by cannabis

The article describes a case of vomiting caused by regular cannabis use. This rare condition is characterized by regular cannabis use, cyclic vomiting and compulsive bathing behaviours.

(Source: Wallace D, et al. Australas Psychiatry 2007;15(2):156-8.)

Schizophrenia and cognition

German researchers compared cognitive performance of 39 schizophrenic patients (19 cannabis-users and 20 non-users) and 39 healthy controls (18 cannabis-users, 21 non-users). On the whole, schizophrenic patients performed worse than healthy control subjects. Regular cannabis use prior to the first psychotic episode improved cognition in some tests. On the other hand, cannabis use deteriorated test performance in healthy controls, especially in cases when regular consumption started before the age of 17.

(Source: Jockers-Scherubl MC, et al. Prog Neuropsychopharmacol Biol Psychiatry 2007 Mar 16; [Electronic publication ahead of print])

 

TheGnome

Anyone know more about this particular study? Its a bit on the personal level since I have in the past year developed a particular problem in the mornings, where I feel sick to my stomach and on occasion dry heave/vomit. I had an inkling that marijunana might have a role in this, but usally when I feel this sickness, I will smoke and feel fine the rest of the day.

Anyone with similar symptoms, or anyone know about more research?

Hashishi

Cannabinoid hyperemesis, I believe it's called.

We had a poster at the lounge who alerted me to it. See HERE.