Although 2% menthol crystal or 5% eucalyptus oil was effective as a natural penetration enhancer when used alone, the average penetration rate reached only half of that of 8% azone.

天然类促进剂单用时，2%薄荷醇和5%桉叶油促透效果较佳，但平均渗透速率约为8%氮酮的一半。

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Although 2% menthol crystal or 5% eucalyptus oil was effective as a natural penetration enhancer when used alone, the average penetration rate reached only half of that of 8% azone.

天然类促进剂单用时，2%薄荷醇和5%桉叶油促透效果较佳，但平均渗透速率约为8%氮酮的一半。

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