|There are particular herbals that should be avoided because they have known toxicities. Those mainly have been shown to cause liver damage. They include comfrey, liferoot and pokeroot to mention just a few.Patients should avoid herbals if they are pregnant, contemplating pregnancy, or lactating.Very elderly and the very young utilizing herbal treatments may face some dangers , because their metabolizing capacity is less than in normal adults.
Most importantly, patients should let their physicians know they are taking them. For example you may be taking ginkgo biloba and you may be also onCoumadin which may increase your risk of bleeding.
At times people are taking number of supplements which may create unexplained problems.