Some have reported unpleasant side effects, including nausea, diarrhea, and vomiting, though herbal medicines are widely used. These can be reduced by using doses that are smaller than the usual recommended dose. In combination with certain other forms of treatment, herbal medicines may be used to prevent disease or relieve symptoms. However, care should avoid combinations that include substances known to hurt the heart or kidneys. Consultation with a qualified medical professional is advisable before using these or any other form of alternative treatment.