Against it is indicated in using anticoagulant patients and patients who will go to submit the surgical processes, given the possibility to cause hemorrhages (WHO, 1999). 3,5 Commercial presentations In general, it has formularizations in 40 the coated tablet form of mg: Each coated tablet contains 40 mg of dry extract of Ginkgo biloba L 24% of ginkgoflavoglucosdeos (equivalent 19,2 mg of ginkgoflavoglucosdeos, specifically quercetina, kempferol). Compressed coated I contend 80 mg of dry extract of Ginkgo biloba L 24% of ginkgoflavoglucosdeos (equivalent 19,2 mg of ginkgoflavoglucosdeos, specifically quercetina, kempferol). Compressed coated of 120 mg: Each coated tablet contains 120 mg of dry extract of Ginkgo biloba L 24% of ginkgoflavoglucosdeos (equivalent the 28,8 mg of ginkgoflavoglucosdeos, specifically quercetina, kempferol). Compressed coated of 180 mg: Each coated tablet contains 180 mg of dry extract of Ginkgo biloba L 24% of ginkgoflavoglucosdeos (equivalent the 30,0 mg of ginkgoflavoglucosdeos) specifically quercetina, kempferol (BRANCHES, 2010). 3,6 Toxic effect Other forms of use of ginkgo biloba as cool leves, or the extracts in low concentrations, do not produce the effect desired.
The first developed extract was EGb 761 in which the ginkgoldio it was studied how much to the chemical aspects, farmacolgicos and toxicolgicos. The seeds, caules and leves contain 4' – O-metilpiroxidina, that causes symptoms of deficiency of the B6 vitamin, including convulsions (TUROLLA; BIRTH, 2006). Each bigger time of scientific studies exists a number that prove the toxicidade of before used plants without restrictions and indiscriminate form. The Ginkgo was responsible for sets of ten of cases of hepatotoxicidade in the Europe. In Brazil, in the decade of 80 the Ginkgo was used as plant for the cure of diverse illnesses. Carried through studies had demonstrated the risk of the internal use of the plant, being told toxic effect of alquilfenis, alergnicos effect and imunotxicas properties. The idea of that medicinal plants do not present toxicidade potential and that for being ' ' naturais' ' it is frequent, it can take the serious consequences as collateral effect and poisonings.