Learn how to use National Institutes of Health databases to look up drug names, classes, and spellings; brand and generic terms and manufacturer names; liver toxicity data; product descriptions and markings; effects of drugs on nursing mothers and breastfed infants. Also learn how to compare active and inert ingredients (such as dyes, fillers and binding agents) for brand and generic medications. Compare different manufacturer's products to identify differences in inert ingredients that may cause allergic reactions. Look up the label information and manufacturer statement for tens of thousands of dietary supplements. Compare active and inert ingredients including preservatives, dyes, fillers, and binders in the supplements you buy.