Table 5.

HPLC Results of the Vancomycin Eye Drop Stability Study (n = 3).

Sample	Drug concentration (mg/mL)
	Day-0	Day-14	Day-21	Day-28	Day-42
10 mg/mL	10.07 ± 0.32	10.09 ± 0.33	10.01 ± 0.37	9.92 ± 0.51	9.88 ± 0.53
50 mg/mL	51.07 ± 1.73	51.48 ± 1.96	51.10 ± 1.90	51.16 ± 2.73	51.27 ± 2.65

Note. All samples were first stored in the freezer for 14 days and then moved to the refrigerator for the remaining study period. In other words, the Day-21, Day-28, and Day-42 samples were stored in refrigerator for 7, 14, and 28 days, respectively.