124 страниц. 2012 год. LAP Lambert Academic Publishing The incidence of gastro intestinal disease is alarming all over the world. Different tablet and liquid preparations are used to overcome the disease. Different experiments are also conducted in different times on different drugs of gastro intestinal diseases in pharmacy lab among them some of the drugs are toxic.Meta analysis is a statistical method to combine evidences or results obtained in individual’s trails.Here six studies on different experiments on toxicity of different preparations used for treating gastro intestinal diseases have been considered. Meta analysis has been performed to estimate the combined effect of toxicity.