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This investigation deals with the affection of permeation of acetylsalicylic acid and paracetamol applied in the system propylene glycol-water 1:1 through full-thickness pig ear skin by alaptide that was applied in nanonized form as a potential chemical penetration enhancer. Alaptide, (S)-8-methyl-6,9diazaspiro[4.5]decan-7,10-dione, is the original Czech compound. The application of nanonized alaptide significantly enhanced the permeation of both drugs through the skin. Enhancement ratios in the studied time interval 0.5-2.0 h varied from 1.11 to 17.70 for acetylsalicylic acid and from 6.83 to 19.83 for paracetamol.
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Černíková et al. (2014) studied this question.
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