Quantitative determination of betamethasone sodium phosphate and betamethasone dipropionate in human plasma by UPLC-MS/MS and a bioequivalence study

Abstract

The compound medicine of betamethasone sodium phosphate (BSP) and betamethasone dipropionate (BDP) is widely used for diverse glucocorticoid-sensitive acute and chronic diseases such as asthma, rheumatoid arthritis and systemic lupus erythematosus. It will be useful and beneficial to validate sensitive method for the determination of BSP, BDP and their metabolites for their pharmacokinetic study. Hereby, an ultra-high pressure liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) has been validated for the determination of BSP, BDP and their metabolites betamethasone (BOH), betamethasone 17-monodipropionate (B17P) and betamethasone 21-monodipropionate (B21P) in human plasma. Liquid-liquid extraction with ether and n-hexane (v/v, 4:1) was used for sample preparation of BDP, BOH, B17P and B21P with beclomethasone dipropionate as internal standard (IS), while solid phase extraction was adopted for sample preparation of BSP using prednisolone as IS. The chromatographic separation was performed on a Hypurity C18 column (150 mm×2.1 mm, 5 μm) for BOH, BDP, B21P and B17P, and a Luna C18 (2) column (150 mm×2.0 mm, 5 μm) for BSP. Electrospray ionization interfaced with positive multiple reaction monitoring (MRM) scan mode was used for mass spectrometric detection. The standard calibration curves were linear within the range of 2.525 × 10−9−403.9 × 10−9 mol·dm−3 for BSP, 0.125 × 10−9−55.81 × 10−9 mol·dm−3 for BDP, 0.278 × 10−9−74.95 × 10−9 mol·dm−3 for BOH, 0.098 × 10−9−4.688 × 10−9 mol·dm−3 for B17P and 0.226 × 10−9−5.411 × 10−9 mol·dm−3 for B21P, respectively. The validated method was successfully applied to a bioequivalence study in 23 healthy subjects after they were injected with this compound medicine BSP and BDP.

Simultaneous determination of three flavonoids and one coumarin by LC–MS/MS: Application to a comparative pharmacokinetic study in normal and arthritic rats after oral administration of Daphne genkwa extract

“…Stable isotope‐labeled internal standard is believed to be the most appropriate internal standard in LC–MS/MS bioanalytical assays (Chen et al, ); however, stable isotope‐labeled internal standards of the four analytes are not commercially available. Considering the polarity difference among the four analytes, we examined several compounds to find a suitable IS.…”

Development of a simple method for simultaneous determination of tazarotene and betamethasone dipropionate and their metabolites using LC–MS method and its application to dermatopharmacokinetic study

“…Several various chromatographic methods have been developed for the quantitative determination of tazarotene or betamethasone dipropionate in different matrices (Bhosale & Rajput, ; Chen et al, ; Tong et al, ). However, there have been no reports on methods to determine single or compound topical drugs in tissue‐engineered skin.…”

Acute musculoskeletal neck and back pain

“…Согласно данным клинического исследования, ССБ Дипроспана = 2,6, что в два раза превышает данный показатель у гидрокортизона (ССБ = 1,3) и более чем в 1,5 раза у метипреда и триамцинолона (ССБ = 1,6) [48]. Немаловажным показателем является также период полувыведения препарата, который в случае Дипроспана достигает 81 ч, что позволяет применять более редкое введение препарата по сравнению с другими ГК (например, период полувыведения дексаметазона и преднизолона равен 3-3,5 ч, а триамцинолона -5 ч) [49].…”