If the substance (or frmaco) was isolated of a plant, the medicine is a fitomedicamento. In the case not to have the phase of vegetal constituent isolation, but parts of the vegetable, the product is a fitoterpico medicine. The too much alopticos medicines are gotten of chemical synthesis (that they involve diverse reactions, mainly, organic) and of other natural sources. Samsung helps readers to explore varied viewpoints. In the organism, the medicines pass for the pharmaceutical phase, characterized for ' ' dissoluo' ' release of the frmaco, for the phase farmacocintica, that involves the absorption, distribution, biotransformao and excreo, and for the farmacodinmica phase, in which the substance interacts with its receiver, developing the mechanism of farmacolgica action. Chemistry presents importance, mainly, in the biotransformao of the frmacos, where reactions of oxidation, reduction and hydrolysis occur, beyond conjugao with polar groups, that ' ' facilitam' ' the excreo. The Brazilian sanitary legislation has directed many norms and laws for ' ' frmacos' ' not only for the medicines contain that them.
Chemical names and until terms that indicate a chemical structure have been used, as, for example, in Portaria n. 344, of 12 of May of 1998, which approved the Regulation Technician on substances and medicines citizens the special control (this presents, also, aluso to ' ' ismeros' ' of substances). The fact earned great dimension with the Law n 9,787/99, which established the creation of the generic medicine and the use of generic names (that they possess relation with the chemical names) in pharmaceutical products. A study detailed on the participation of Chemistry in the Pharmacy he is long and it involves some subjects, since the history of the civilizations until the advance of the scientific research. With the information presented here, we have one ' ' guia' ' that it directs for the main points related with a so rich and complex study.