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, penic iline and others antibiotics, disminshed the popularity of traditional medi cine. In this work we explain why the interest on medical plant extracts su rged again. We describe the pharmacodynamic and the pharmacokinetic aspects of three ph ytomedicines: Hypericum perforatum (Saint John's flower) for depression, Pi per-methysticum (Kava-kava) for anxiety and Ginkgo biloba, for dementia.