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Objective   To carry out the meta-analysis on the clinical safety of glycyrrhizic acid and the influencing factors between 18 α -glycyrrhizinate (18 α -GL) and 18 β -glycyrrhizinate (18 β -GL).Methods   Magnesium isoglycyrrhizinate injection was used as the representative preparation of 18 α -GL, and compound glycyrrhizin injection was used as the representative preparation of 18 β -GL. The clinical control trial of magnesium isoglycyrrhizinate injection and compound glycyrrhizin injection was searched in a computer, which was published from January 2006 to December 2019 on the databases such as PubMed, China National Knowledge Infrastructure (CNKI), China Science and Technology Journal Database (CSTJ), and Wanfang Medical Network (Wanfang Data). The data associated with adverse drug reactions (ADRs) were extracted. RevMan5.3 was used for statistical analysis.Results   Finally, 24 studies were included, and 2757 patients were involved, of which the experimental group was mainly treated with magnesium isoglycyrrhizinate, while the control group was mainly treated with compound glycyrrhizin. The results showed that the occurrence of ADRs was significantly lower in the experimental group than that in the control group, and the difference between two groups was statistically significant (RR = 0.26, 95% CI = (0.18, 0.38),  P  < 0.00001). There was no heterogeneity among the studies ( I  2  = 0%,  P =1.00).Conclusion   Compared with 18 β -GL, 18 α -GL had a lower incidence of adverse reactions and better clinical safety.

Meta-Analysis Based on Clinical RCTs: The Effect of Molecular Epimerism on the Safety of Glycyrrhizic Acid