Enhanced Topical Delivery of Tetrandrine by Ethosomes for Treatment of Arthritis

Table 1

The p𝐾_𝑎 values of tetrandrine in different concentrations of hydroethanolic solutions.

Concentration of tetrandrine (mmol/L)	% ethanol (v/v)
	40	50	60	0
1.50	7.08	7.05	7.06	7.11
1.00	6.46	7.23	6.28	7.12
0.50	6.43	6.73	6.18	7.08