To improve the effectiveness of their drug.

Related StoriesMD Anderson research reveals why chemotherapy medicines not effective for many pancreatic cancer patientsMeat-rich diet may increase kidney tumor riskStudy shows uncommon HER2 missense mutations usually do not spread breasts cancer on their ownAlthough putting polymer implants directly at the site of tumor is a proven treatment for cancers of the mind, Saltzman says that achievement of this approach is minimized because in most cases the drug does not penetrate in to the brain far enough for optimum treatment and there is certainly rapid clearance of the medication from the site. To improve the effectiveness of their drug, Saltzman’s group attached polyethylene glycol , an inert water-soluble polymer, to it stendra price .