Table 1. Visual inspection with unaided eye on black background of each sample and control solution.

Solution	0 minutes	30 minutes	1 hour	2 hours
Vancomycin 10 mg/mL / Oxacillin 20 mg/mL	White, cloudy	Uniformly cloudy	Uniformly cloudy; unchanged	Precipitant settled at bottom of tube
Vancomycin 10 mg/mL / Oxacillin 20 mg/mL	Chunky, solid, white layer between 2 clear layers	Chunky; larger chunks fall off on agitation	Chunky; larger chunks fall off on agitation; unchanged	Milky, some precipitant settled at bottom of tube
Vancomycin 10 mg/mL / Oxacillin 20 mg/mL	Milky white with approximately 3 mm chunk	Milky, varied with some solid parts within	Milky, varied with some solid parts within; unchanged	Layered, with 1 layer settled at bottom of tube
Vancomycin 10 mg/mL / Oxacillin 20 mg/mL	White flakes, layered appearance	Layer of white precipitant between 2 clear layers	Layer of white precipitant between 2 clear layers; unchanged	Milky, with some precipitant settled at bottom of tube
Vancomycin 10 mg/mL	Clear	Clear	Clear	Clear
Oxacillin 20 mg/mL	Clear	Clear	Clear	Clear
Deionized water	One air bubble	Clear	Clear	Clear
Sterile water for injection	Clear	Small air bubbles	Small air bubbles	Small air bubbles
Dextrose 5% in water	Clear	Medium air bubbles	Medium air bubbles	Medium air bubbles