This booklet is designed to help mental health patients and their families understand how and why medications can be used as part of the treatment of mental health problems.It is important for you to be well informed about medicationsyou may need. You should know what medications you take and the dosage, and learn everything you can about them. Many medications now come with patient package inserts, describing the medication, how it should be taken, and side effects to look for. When you go to a new doctor, always take with you a list of all of the prescribed medications (including dosage), over-the-counter medications, and vitamin, mineral, and herbal supplements you take. The list should include herbal teas and supplements such as St. John's wort, echinacea, ginkgo, ephedra, and ginseng. Almost any substance that can change behavior can cause harm if used in the wrong amount or frequency of dosing, or in a bad combination. Drugs differ in the speed, duration of action, and in their margin for error.