Patent 11865208 was granted and assigned to Sol-Gel Technologies on January, 2024 by the United States Patent and Trademark Office.
Topical vaginal compositions are disclosed herein which include silica microspheres and an active ingredient in the amount of 0.001 to 15.0% w/w selected from estradiol, metronidazole, clindamycin, butoconazole, and combinations thereof. The topical compositions provide sustained release of the active ingredient so as to reduce skin irritation.