“…However, even these assumptions cannot be verified at present. For example, ingestion of harmine leads to bradycardia (58,61,105). In our own experimentation with animals we observed antidopaminergic properties in THN, 6-0H-THN and harmane that would tend to make the therapeutic effectivity of these substances in the treatment of Morbus Parkinson even more inscrutable (43,69,80,81).…”