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Five of 8 patients with unipolar or bipolar endogenous depressions taking prolyl-leucyl-glycinamide (MIF-I), 75 mg/day, showed substantial improvement within a few days of beginning treatment compared with similar improvement in only 1 of 10 receiving 750 mg/day of MIF-I and only 1 of 5 patients taking placebo. The lower dose of MIF-I was associated with significantly greater improvement than both the higher dose and placebo on all of the rating scales used. The authors suggest that an even lower dose of MIF-I, on the order of 0.1 mg/kg, may have a greater effect as an antidepressant.
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Ehrensing et al. (1978) studied this question.
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