Abstract
This article builds on the previous part of the number 5 (volume 10, 2014) and deals with the evaluation of the risks of common medicinal plants. Patients often do not realize the risks and believe that the effect of herbal drugs multiply by increasing the dosage.
There can be achieved a toxic level of some constituent of medicinal plant by this way. The second part of the text includes toxic effects of plants used as medicines: ginkgo, tea tree, senna and ginseng