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Compatibility of Estradiol, Estriol, Estrone, Progesterone, and Testosterone Single Formulation in Fitalite, Versatile, or HRT Supreme Cream Base

Author(s):  Polonini Hudson C, Dijkers Eli, Ferreira Anderson O, Zander Clark, Taylor Sarah

Issue:  Jul/Aug 2021 - Volume 25, Number 4
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Abstract:  In this work, we focus on three ready-to-use vehicles: Fitalite, Versatile, and HRT Supreme Cream Base. Fitalite is a natural, light, hydrophilic gel-cream that contains vitamin E and oil bodies from plant sources (phytosomes), providing antioxidant and skinmoisturizing properties. Versatile is a vanishing oil-inwater cream base which retains its consistency with a broad range and high concentrations of active pharmaceutical ingredients, dermaceutical ingredients, and solvents. Finally, HRT Supreme Cream Base is a paraben-free, dye-free, fragrance-free O/W emulsion base, formulated with a complex of botanical oils to soothe and provide moisture to dry and sensitive skin. In the current study, we evaluated the beyond-use date of formulations containing estradiol, estriol, estrone, progesterone, and testosterone in combination, compounded with these three vehicles. Validated, stability-indicating high-performance liquid chromatography methods were used throughout a 180-day period. A beyond-use date of 180 days was observed for all vehicles stored both at refrigerated and at room temperature. The combination of five ingredients represents a worst-case scenario since there are more possibilities of cross reactions. Therefore, we expect the same or greater stability as individual ingredients are removed from the tested formulation. The extended beyond-use dates provide convenience for both the compounding pharmacist and the patient.

Related Keywords: Hudson C. Polonini, BPharm, MSc, PhD, Eli Dijkers, PharmD, PhD, Anderson O. Ferreira, BPharm, MSc, PhD, Clark Zander, BSc, Sarah Taylor, PharmD, commercial vehicles, estradiol, estriol, estrone, progesterone, testosterone, hormone replacement therapy, topical preparations, transdermal application, emulsions, Fitalite gel-cream, Versatile vanishing o/w cream base, HRT Supreme Cream base, drug combinations, compatibility, chemical stability, physical stability


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