The present invention provides a surprising therapeutic beneficial use for the topical application of valproic acid as a single agent therapy for patients suffering from mild to moderate acne vulgaris. Topically applied VPA has a clinical efficacy comparable to that of the marketed standard medication for this indication, isotretinoin. Furthermore, topically applied VPA is on average well to very well tolerated. The invention relates to the topical medical use of VPA for the treatment of acne vulgaris and comprises the topical application of VPA or of a pharmaceutically acceptable salt thereof.
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