An unusual intracameral precipitation after trabeculectomy

[...]in the presence of corneal wounds, cefuroxime can diffuse and achieve high AC concentrations, even after topical application. 3 Vancomycin HCl 2 mg/ml has been reported to be physically compatible in vitro when mixed with cefuroxime sodium at a Y-site injection at concentrations 4 of 1, 10, 50 and 150 mg/ml. In a related publication, Raju et al 5 observed vancomycin's pH-dependent precipitation in vitro; they noticed visible precipitation of vancomycin in a balanced salt solution, which has a pH of 7.6.