Table 2

Stability of nefopam 2.5 mg/mL diluted with 0.9% sodium chloride (NaCl 0.9%)

Syringe	Initial nefopam concentration (mg/mL)	Percentage of initial concentration±SD (%)
Syringe	Initial nefopam concentration (mg/mL)	0 hour	6 hours	24 hours	48 hours
S1	2.60	100.00±0.26	100.28±0.18	100.53±0.02	100.39±0.02
S2	2.58	100.00±0.22	101.14±0.25	100.86±0.12	101.28±0.12
S3	2.61	100.00±0.15	99.78±0.27	100.28±0.27	99.64±0.20

Note: Drug concentrations in samples taken at time zero were designated as 100%. Samples were prepared in triplicate for each syringe.