A generic drug is that specialty with the same pharmaceutical form and equal qualitative and quantitative composition in medicinal substances to another specialty of reference, whose effectiveness and safety profile is sufficiently established by its ongoing clinical use.A generic must offer us the same efficacy and safety than a brand name drug. Generic drugs are cheaper, due to lower costs for research and development of the drug. This is what lets commercialize it at a lower price, without any degradation of quality of the medicinal product. A generic is permitted only if it meets the rules of correct manufacture of medicinal products and it has been proven that it acts identically to the brand. Therefore, the quality of generic requirements are the same as those required for any other specialty pharmaceutical. In this regard it should be pointed out that the lowest final price the generic does not indicate a decline in quality of the product, but that only reflects the circumstance that did not have to repay a few research expenses, that Yes had to endure, in due course, the original. Generic drugs are recognized for having in its container the Spanish official name (DOE) or, in its absence, by the international common denomination (DCI), followed by the name or brand of the owner or manufacturer and abbreviations EFG (specialty pharmaceutical generic). The presence of abbreviations EFG on the outer packages, becomes a crucial aspect to be able to identify a generic. Confusion can come with the existence of certain trademarks that appear to be generic without being, since its name consists of the name of the active princicio (DOE or DCI) plus the name of the manufacturing laboratory, but without abbreviations EFG. Generics represent a saving both for the consumer and for the Spanish sanitary system.