By means of the primary effect, the drugs are capable to modify the organic functions, no longer secondary effect is causing to the effect rebote, where it is the neutralization of the first effect of the medicine. The reason of being used the medicine diluted and dinamizado to potencializar the disease, is so that the primary effect unobserved pass and desperte the secondary effect of the organism (SOURCES et al., 2009). By Hahnemann it was established 4 universal principles of the Homeopatia: 1- Law of the fellow creature that cure the fellow creature; 2- the experimentation in the man is; 3- infinitesimal doses, where the medicine is diluted innumerable times where the power dressing better is succeeded of suctions and 4- Only Medicine (TEIXEIRA, 2008). The Law of the Fellow creature consists of provoking with the substance in a healthy person equal symptoms to the one of a sick person (BARBOSA GRANDSON, 2006). The experimentation in animals is imperfection, due to sensitivity of the animals and human beings to be distinct, also being an incognito its language, a time that they would not know to describe its sensations. Not it could be used of sick human beings because they would not obtain to acquit if the reaction would be of the substance or the illness. Had to everything this the farmacolgicas research of the homeopatia is carried through in healthy human beings, however without very provoking serious comprometimentos in the state of health of the experimenter, whom had to the doses to be diluted (SOURCES et al., 2009). Its 3 principle is of the dilution where Hahnemann chose to dilute in each stage in the ratio of a portion of the active substance for each one hundred parts of diluente (water) and for conservation of the solution dinamizada and finished the etlico alcohol, being that each dilution, it came preceded of one hundred agitations to dinamizar it (CESAR, 2008).