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Does long-term lithium treatment induce diabetes mellitus?
1Department A, Psychiatric Hospital, Risskov, Denmark.
Neuropsychobiology
|January 1, 1987
Summary
Long-term lithium treatment for manic-depressive disorder did not elevate blood sugar levels or increase diabetes risk. Blood glucose remained stable in patients, even with age and weight gain during treatment.
Area of Science:
- Psychiatry
- Endocrinology
- Pharmacology
Background:
- Lithium is a common treatment for bipolar disorder (manic-depressive illness).
- Concerns exist regarding potential metabolic side effects of long-term lithium use, including effects on glucose metabolism.
Purpose of the Study:
- To investigate the long-term effects of lithium treatment on fasting blood sugar levels in patients with manic-depressive illness.
- To assess whether lithium therapy increases the risk of developing diabetes mellitus.
Main Methods:
- Fasting blood sugar was measured in patients before and during lithium treatment for up to 6 years.
- Total patient exposure to lithium was 495.5 years.
- Changes in blood sugar were analyzed in relation to patient age and body weight changes.
Main Results:
- Mean blood sugar levels remained stable throughout the study period, comparable to pre-treatment levels.
- Despite significant increases in patient age and body weight, no substantial rise in mean blood sugar was observed.
- Only one patient developed manifest diabetes during the entire observation period.
Conclusions:
- Long-term lithium treatment does not appear to be associated with an increased risk of hyperglycemia or diabetes mellitus.
- The findings suggest that lithium's impact on glucose metabolism is minimal in the long term.
- Careful monitoring of metabolic parameters remains advisable, but lithium's established efficacy in bipolar disorder is not significantly undermined by diabetes risk.