Table 2. Target evaluation of DXM-NLP and SPA-DXM-NLP.

Sample	Relative Rate of Uptake		Peak Concentration Ratio
	DXM-NLP	SPA-DXM-NLP	DXM-NLP	SPA-DXM-NLP
Plasma	2.9	3.9	1.3	1.2
Lung	24.7	40.2	2.9	5.1
Liver	2.0	1.4	1.8	1.5
Spleen	4.4	3.4	4.9	3.6
Kidney	1.3	0.7	0.8	0.4
Heart	1.3	1.0	1.4	0.9

R _e: the relative rate of uptake;

C _e: peak concentration ratio.