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: 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
Related Categories: EXCIPIENTS, HRT, PEER-REVIEWED, STABILITIES, COMPATIBILITIES, DOSAGE FORMS/DRUG CARRIERS
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