Cerebral Pharmacokinetics of Tremor-Producing Harmala and Iboga Alkaloids

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Abstract
Tremor-producing activity and concentration in brain were determined in mice for 4 harmala and 5 iboga alkaloids. All compounds were active, however, harmalol only after intracerebral injection. Kinetics of evasion from brain were first-order functions with most drugs, but revealed 2 compartments for harmalol and 3 for ibogaline. Tremor-producing activity was much more influenced by chemical structure than by lipid solubility. This points to specific receptors for indole compounds in tremorigenic brain structures.

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