Prescription: A physician's order for the preparation and administration of a drug or device for a patient. A prescription has several parts. They include the superscription or heading with the symbol "R" or "Rx", which stands for the word recipe (meaning, in Latin, to take); the inscription, which contains the names and quantities of the ingredients; the subscription or directions for compounding the drug; and the signature which is often preceded by the sign "s" standing for signa (Latin for mark), giving the directions to be marked on the container.
Claritin's approval for OTC marketing was based on FDA's criteria for determining appropriate drugs for OTC use - namely that the drug in question treats a condition that consumers can diagnose and manage themselves; that the drug is sufficiently safe for use by consumers without direct prescriber supervision; and that the drug's label explains potential adverse effects and conditions of use with clear and understandable directions.
Cell: The basic structural and functional unit in people and all living things. Each cell is a small container of chemicals and water wrapped in a membrane .
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