MedlinePlus: AnxietyMedlinePlus is a free resource that contains a plethora of credible health information. Managed by the U.S. National Library of Medicine, this source has a topic page specifically devoted to anxiety and contains both background information and links to additional reputable resources. MedlinePlus also has a medical dictionary, which provides more information on specific types of anxiety disorders, and a dictionary of drugs, herbs, and supplements, which provides information about different types of treatments recommended to those with anxiety disorders.