Compatibility of Gestrinone, Nimesulide, and Piroxicam in Pentravan for Transdermal and Transmucosal Application.

Transdermal products are intended to be applied topically but to promote the biological effects systemically, while transmucosal products have the same final effect but are to be applied on mucosa (for example, vaginal mucosa). The extension and velocity in which absorption occurs vary depending on the vehicle used, the active pharmaceutical ingredient and a broad range of other factors related to the formulation, patient, and environmental characteristics. Ready-to-use vehicles, such as Pentravan, with proven penetration efficacy for various active pharmaceutical ingredients, are paramount. Pentravan, specially developed for compounding pharmacies, has been extensively studied. To date, most studies have focused on endocrinology (e.g., sexual hormones), anti-aging strategies, and gynecology (endometriosis and related conditions). In this work, we have determined the compatibility of Pentravan and three active pharmaceutical ingredients: gestrinone, a steroidal substance for vaginal use (endometriosis), and nimesulide and piroxicam, two nonsteroidal anti-inflammatory drugs used both for topical and vaginal application. This article shows an excellent beyond-use date of 180 days when stored at room temperature, which renders it suitable for daily practice.