Table 1.

Stability of Ketamine Stored in Glass Vials at Room Temperature with Exposure to Light^*

Study Day	% of Initial Concentration Remaining†
7	99.5 ± 1.2
14	99.2 ± 0.9
28	98.8 ± 0.9
56	99.5 ± 0.8
91	98.0 ± 0.3
182	96.2 ± 0.9

^*Nominal original concentration was 10 mg/mL. Observed original concentration (mean ± standard deviation, based on 3 samples assayed in duplicate [n = 6]) was 9.3 ± 0.06 mg/mL.

^†Mean ± standard deviation, based on 3 samples assayed in duplicate (n = 6).