CONCLUSION: 
This small, open design study of high dose creatine add-on for 6 months in chronic inpatients with schizophrenia demonstrated only mild positive effects  on the patients’ symptomatology and behavior and might have beneficial effect on tardive parkinsonism.
  
  
    
  U Levental, Y Bersudsky, T Dwalatzky, V Lerner, S Medina and J Levine,
  The Israel journal of psychiatry and related sciences , 2015
  The effects of creatine on brain metabolism and the potential cognitive enhancing properties of this compound raise the possibility of developing a new augmentation therapeutic strategy in schizophrenia especially in patients demonstrating negative and cognitive symptomatology.Seven inpatients with chronic schizophrenia presenting with treatment resistant negative symptoms were enrolled into exploratory treatment study with creatine monohydrate augmentation at a daily high-dose of 10 grams, administered for 6 months. Several clinical rating scales and a computerized cognitive assessment battery were applied.Creatine treatment mildly improved the schizophrenia symptomatology but there were no significant changes in cognitive functions. Several ward behaviors were also improved. Tardive parkinsonism improved numerically by above 40% in 4 out of 6 patients.This small, open design study of high dose creatine add-on for 6 months in chronic inpatients with schizophrenia demonstrated only mild positive effects on the patients' symptomatology and behavior and might have beneficial effect on tardive parkinsonism.
   
  
    
    
  
  
 
             
            
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                pob  
              
                  
                    April 6, 2015,  4:34am
                   
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              Mild might be better than none.  This drug has been around for a while.