Figure 2
From: Esters of terpene alcohols as highly potent, reversible, and low toxic skin penetration enhancers

The effects of the studied enhancers on the permeation of the model drugs theophylline (TH, panel A) and hydrocortisone (HC, panel B) through human skin. Data are presented as the means ± SD; n ≥ 3. The flux values were calculated from the linear regions of the plots (mostly after 20 h). For flux values and statistical significance, see Tables 1 and 2.