Personal tools
You are here: Home Knowledge Base Psychiatric Drugs Neuroleptics Brain Damage Caused by Neuroleptic Psychiatric Drugs Neuroleptics shrink brains in monkeys
Look inside...
 

Neuroleptics shrink brains in monkeys

In this study, both an older neuroleptic (Haldol or "haloperidol") and a newer atypical neuroleptic (Zyprexa or "olanzapine") caused significant shrinkage in the higher level parts of the brains in monkeys. Source: Neuropsychopharmacology 9 March 2005

Haldol, Olanzapine Cause Brain Shrinkage in Monkeys


Three groups of six macaque monkeys each were exposed to oral haloperidol, olanzapine or sham for a 17-27 month period.

There was an 8-11% reduction in mean fresh brain weights as well as left cerebrum fresh weights and volumes in both drug-treated groups compared to sham.

The differences were observed across all major brain regions (frontal, parietal, temporal, occipital, and cerebellum), but was increased in the frontal and parietal regions in both gray and white matter.

There was a similar shrinkage in volume that was greater in drug-treated monkeys compared to sham.

(Note: As originally reported here, the study looked at changes in volume caused by "tissue fixation" itself, but this secondary focus is not relevant to this concern about drug-induced brain changes.)

Medical study source:

The Influence of Chronic Exposure to Antipsychotic Medications on Brain Size before and after Tissue Fixation: A Comparison of Haloperidol and Olanzapine in Macaque Monkeys.


by Dorph-Petersen KA, Pierri JN, et al. from University of Pittsburgh.

Source: Neuropsychopharmacology 9 March 2005


For an abstract, full text, and to download a free PDF of the article, click here this link:

http://www.nature.com/npp/journal/v30/n9/abs/1300710a.html

Document Actions
Donate Now

Give securely online and indicate if you have a preferred campaign that you'd like to support with your donation!

We are MFI



Matt Morrissey

Matt Morrissey is on the MFI Choice in Mental Health Campaign Committee. Matt is a psychiatric survivor with a master’s in counseling who directs the adult day program at Full Spectrum Progressive Mental Health, which is a nonprofit center in San Francisco that offers voluntary programs for adults and adolescents in severe emotional distress. Full Spectrum is a Sponsor Group in MFI. Matt is shown here speaking at an MFI co-sponsored protest in front of the American Psychiatric Association. (Photo by Tom Olin)
Sign Up Today!





Social and Email Marketing by VerticalResponse

 

Facebook Like Box