Assessing the risks and benefits of herbal medicine: an overview of scientific evidence.

The use of herbal medicine is widespread and growing, with as many as 3 in 10 Americans using botanical remedies in a given year. Because many herbal medicines have significant pharmacological activity, and thus potential adverse effects and drug interactions, healthcare professionals must be familiar with this therapeutic modality. This article summarizes the history and current use of plant-based medicine and highlights the evidence of the risks and benefits associated with 6 plants: echinacea, garlic, ginger, ginkgo, St John's wort, and valerian. Therapies outside the medical mainstream tend to suffer from a dearth of research and critical evaluation. Critics and supporters alike note the conceptual and practical difficulties in studying many complementary and alternative therapies such as acupuncture, homeopathy, and meditation. Herbal medicine, however, lends itself well to standard evaluation methods. This article summarizes and evaluates evidence from randomized controlled trials and meta-analyses. We present the results of meta-analyses and subsequent randomized controlled trials for garlic and St John's wort; a comprehensive critical review and subsequent randomized controlled trials for ginkgo; and summaries of all identified randomized controlled trials for echinacea, ginger, and valerian.

[Life-threatening hyponatremia provoked by alternative treatment. An occurrence in a patient with chronic lymphocytic leukemia with no indication for treatment]. / Livstruende hyponatriaemi udløst af alternativ behandling. Et tilfaelde hos en patient med ikkebehandlingskraevende kronisk lymfatisk leukaemi.

Alternative medicine is a heterogeneous group of treatments which has become increasingly popular in cancer patients in the Western world in recent years. We describe a 77-year-old female with chronic lymphocytic leukemia, who developed severe hyponatremia during treatment with alternative medicine given by a general practitioner over a 3-year-period. From a hematological point of view, there was no need for this expensive treatment as the disease was stable with a normal hemoglobin and thrombocyte count and no B-symptoms. The case illustrates a need for better control of the alternative practitioners and for the adverse reactions to their treatments by the National Health Service.