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In rats, a series of anticonvulsant compounds have been shown to cause a significant elevation of brain 5-hydroxytryptamine (5-HT) levels in comparison with control values. This increase in 5-HT only occurred in brain tissue and was not observed in spleen, upper small intestine or blood. Elevation of brain levels of 5-HT by iproniazid (Marsilid) or 5-hydroxytryptophan failed to give protection against the convulsant or lethal action of lept zol (75 mg./kg.).
Bonnycastle et al. (Sat,) studied this question.