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Donepezil in a chronic drug user--a potential treatment?

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Donepezil in a chronic drug user--a potential treatment?
Jovanovski D, Zakzanis KK.
Hum Psychopharmacol. 2003 Oct;18(7):561-4.

The objective of the current study was to explore the potential cognitive benefits of an anticholinesterase inhibitor, donepezil, in a former chronic drug user. A neuropsychological test battery composed of the vocabulary and matrix reasoning subtests of the Wechsler adult intelligence scale-III, measures of everyday executive functioning (behavioural assessment of the dysexecutive syndrome [BADS]), and verbal learning and memory tasks (California verbal learning test-II; Rivermead behavioural memory test) was completed at baseline, at 3 months after introducing donepezil, and at 3 months after donepezil was discontinued. After donepezil treatment, substantial improvements were found on tasks of nonverbal fluid reasoning (i.e. matrix reasoning) and other executive functioning tests (i.e. BADS). At entry into the study, poor academic performance and subjective problems with memory and concentration were reported, particularly after amphetamine use (i.e. MDMA and crystal methamphetamine); after donepezil treatment, dramatic increases in memory, concentration and academic achievement were observed. The finding of improvements in tests of executive functioning and in academic performance in this case study, together with the minimal adverse side effects of donepezil, warrants the investigation of controlled studies of cholinergic enhancement in chronic amphetamine and other drug users.

Full text as pdf: http://www.sendspace.com/file/1ebz2s
 
Just a bit of information:

Relatively specific reversible and non competitive. Acetylcholinesterase inhibitor for the treatment of dementia including Alzheimer's disease. Launched in USA for the symptomatic treatment of mild to moderate Alzheimer's disease. (1996). T max 4 hours. Terminal disposition T 1/2 > 70 hours. Protein binding: 93-96 %. Once-daily dosing. 1. Hepatic metabolization. Predominant renal elimination for the parent compound and its metabolites. Reports suggest that the pharmacokinetics do not change in patients with impaired renal function and that dosing modifications are not needed in patients with hepatic disease. 2. Animal studies show that donepezil in overdose may affect the respiratory and cardiovascular systems and the ECG. Therefor donepezil-treated patients'respiration should be carefully controlled during anesthesia. 3. A preliminary trial suggests the efficacy and safety in treatment-resistant bipolar disorder. 4. A benefical effect on tardive dyskinesia in a schizophrenic patient with Alzheimer's disease merits further investigation. 5. Can reduce psychotropic-induce memory loss in nongeriatric affective patients but may trigger mania. It has been reported that donepezil improves dyskinesia in idiopathic Parkinson's disease without compromise to motor control. Only Alzheimer's disease is an approved indication.

It can help fomer drug users just by improving cognitive function? (like Piracetam I guess)
Or does it have another action on former drug users' brain?
 
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