Table 1.

Effect of 3% w/v EO on SC/vehicle partition coefficients of ibuprofen (n = 3).

EO	Partition coefficient	Ratioa
Vehicle	0.41 ± 0.06	1.00
Azone	0.51 ± 0.06	1.24
Turpentine oil	0.72 ± 0.01***	1.76
Angelica oil	0.51 ± 0.09	1.24
Chuanxiong oil	0.75 ± 0.01***	1.83
Cyperus oil	0.68 ± 0.09*	1.66
Cinnamon oil	0.80 ± 0.12**	1.95
Clove oil	0.98 ± 0.07***	2.39

^*p < 0.05,

^**p < 0.01,

^***p < 0.001 vs. the vehicle group.

^aRatio = (partition coefficient with 3% w/v EO treatment)/(partition coefficient with vehicle treatment).