Table 5. Record of stability and recovery of the OD decoction and drug serum.

RSD (%)		Stability in 4 ℃					Recovery
Validation sample		0 h	6 h	12 h	24 h		80	100	120
OD		1.96	2.31	2.03	1.57		4.17	3.50	2.70
Drug serum		5.53	4.55	4.71	5.48		7.17	7.38	6.46

OD, Oldenlandia diffusa; RSD, relative standard deviation.