Phytopharmacology as an alternative treatment in psychiatry.

Phytomedicines for the treatment of different diseases have been used since a long time ago, but the discovery of synthetic dregs, like sulphas, peniciline and others antibiotics, disminshed the popularity of traditional medicine. In this work we explain why the interest on medical plant extracts surged again. We describe the pharmacodynamic and the pharmacokinetic aspects of three phytomedicines: Hypericum perforatum (Saint John's flower) for depression, Piper-methysticum (Kava-kava) for anxiety and Ginkgo biloba, for dementia.