Related Experiment Videos
Cognitive impairment in methadone maintenance patients
Miriam Z Mintzer1, Maxine L Stitzer
1Department of Psychiatry and Behavioral Sciences, Behavioral Biology Research Center, Johns Hopkins University School of Medicine, 5510 Nathan Shock Drive, Baltimore, MD 21224, USA. mmintzer@jhmi.edu
Drug and Alcohol Dependence
|June 14, 2002
Summary
Methadone maintenance patients (MMP) show cognitive and psychomotor impairments, affecting speed, memory, and decision-making. These deficits may impact daily functioning, requiring further investigation into their causes and clinical significance.
Area of Science:
- Neuroscience
- Psychology
- Addiction Medicine
Background:
- Limited research exists on the psychomotor and cognitive effects of methadone maintenance treatment (MMT).
- Understanding these effects is crucial for assessing daily functioning in patients undergoing MMT.
Purpose of the Study:
- To evaluate psychomotor and cognitive performance in opioid-dependent patients receiving methadone maintenance treatment (MMP).
- To compare MMP performance against a control group without substance abuse histories.
Main Methods:
- 18 opioid-dependent MMP and 21 controls were assessed.
- Groups were matched for demographics and cognitive baseline.
- Urine and breathalyzer tests ensured recent abstinence from certain substances.
- Participants with current heroin/cocaine use abstained for 24 hours.
Main Results:
- MMP demonstrated significant impairments in psychomotor speed, working memory, decision-making, and metamemory compared to controls.
- Potential deficits in inhibitory control were also suggested.
- No significant impairments were found in time estimation, conceptual flexibility, or long-term memory.
Conclusions:
- Methadone maintenance patients exhibit a broad range of cognitive and psychomotor impairments.
- These findings suggest potential challenges in daily functioning for MMP.
- Further research is needed to clarify the clinical relevance and specific causes of these impairments.