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Abstract
Background: The use of pentane-1,5-diol in topical pharmaceutical products is relatively new compared with, e.g., propane-1,2-diol (propylene glycol), also an aliphatic diol, which has been used for many years. Yet, what are the differences between diols in clinical efficacy, safety and other characteristics? Objective: The objective of this overview was to compare the efficacy, safety, chemical and pharmaceutical characteristics of pentane-1,5-diol with other aliphatic diols used in pharmaceutical formulations in dermatology. Methods: A survey of the literature was carried out based on searches limited to aliphatic diols. Results/conclusion: Pentane-1,5-diol was found to be safe and more effective than several other diols with respect to drug delivery-enhancing potency, pharmaceutical and cosmetic properties, antimicrobial spectrum and toxicity. Results from formal clinical trials with pentane-1,5-diol verify its efficacy and safety. These characteristics together with its low cost make pentane-1,5-diol an attractive substance for use in pharmaceutical formulations for topical administration.