Supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) enhance the bioavailability of the poorly water-soluble drug Simvastatin in dogs
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Supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) enhance the bioavailability of the poorly water-soluble drug Simvastatin in dogs. / Thomas, Nicky; Holm, René; Garmer, Mats; Karlsson, Jens Jakob; Müllertz, Anette; Rades, Thomas.
In: A A P S Journal, Vol. 15, No. 1, 2013, p. 219-27.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) enhance the bioavailability of the poorly water-soluble drug Simvastatin in dogs
AU - Thomas, Nicky
AU - Holm, René
AU - Garmer, Mats
AU - Karlsson, Jens Jakob
AU - Müllertz, Anette
AU - Rades, Thomas
PY - 2013
Y1 - 2013
N2 - This study investigates the potential of supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) to improve the bioavailability of poorly water-soluble drugs compared to conventional SNEDDS. Conventional SNEDDS contained simvastatin (SIM) at 75% of the equilibrium solubility (S (eq)). Super-SNEDDS containing SIM at 150 and 200% of S (eq) were produced by subjecting the SNEDDS preconcentrates to a heating and cooling cycle. The super-SNEDDS were physically stable over 10 months. During in vitro lipolysis of SNEDDS and super-SNEDDS the SIM concentration in the aqueous phase increased for the first 30 min almost proportional to the drug loads and amounts of preconcentrate employed. The 200% drug-loaded super-SNEDDS generated an amorphous SIM precipitate at the end of in vitro lipolysis. In vivo, the relative bioavailability of SIM from super-SEDDDS increased significantly to 180¿±¿53.3% (p¿=¿0.014) compared to the dosing of two capsules of (dose equivalent) 75% drug-loaded SNEDDS. A significant increase in the terminal half-life of elimination was observed for super-SNEDDS (2.3¿±¿0.6 h) compared to conventional SNEDDS (1.4¿±¿0.3 h) as well as a decreased area under the curve ratio of the SIM metabolite simvastatin acid to the parent compound (0.57¿±¿0.20 and 0.90¿±¿0.3), possibly due to a combination of saturation effects on presystemic metabolising enzymes and prolonged absorption along the small intestine. In summary, this study demonstrated that super-SNEDDS are a viable formulation option to enhance the bioavailability of poorly water-soluble drugs such as simvastatin while reducing the pill burden by an increased drug load of SNEDDS.
AB - This study investigates the potential of supersaturated self-nanoemulsifying drug delivery systems (super-SNEDDS) to improve the bioavailability of poorly water-soluble drugs compared to conventional SNEDDS. Conventional SNEDDS contained simvastatin (SIM) at 75% of the equilibrium solubility (S (eq)). Super-SNEDDS containing SIM at 150 and 200% of S (eq) were produced by subjecting the SNEDDS preconcentrates to a heating and cooling cycle. The super-SNEDDS were physically stable over 10 months. During in vitro lipolysis of SNEDDS and super-SNEDDS the SIM concentration in the aqueous phase increased for the first 30 min almost proportional to the drug loads and amounts of preconcentrate employed. The 200% drug-loaded super-SNEDDS generated an amorphous SIM precipitate at the end of in vitro lipolysis. In vivo, the relative bioavailability of SIM from super-SEDDDS increased significantly to 180¿±¿53.3% (p¿=¿0.014) compared to the dosing of two capsules of (dose equivalent) 75% drug-loaded SNEDDS. A significant increase in the terminal half-life of elimination was observed for super-SNEDDS (2.3¿±¿0.6 h) compared to conventional SNEDDS (1.4¿±¿0.3 h) as well as a decreased area under the curve ratio of the SIM metabolite simvastatin acid to the parent compound (0.57¿±¿0.20 and 0.90¿±¿0.3), possibly due to a combination of saturation effects on presystemic metabolising enzymes and prolonged absorption along the small intestine. In summary, this study demonstrated that super-SNEDDS are a viable formulation option to enhance the bioavailability of poorly water-soluble drugs such as simvastatin while reducing the pill burden by an increased drug load of SNEDDS.
U2 - 10.1208/s12248-012-9433-7
DO - 10.1208/s12248-012-9433-7
M3 - Journal article
C2 - 23180162
VL - 15
SP - 219
EP - 227
JO - A A P S Journal
JF - A A P S Journal
SN - 1550-7416
IS - 1
ER -
ID: 43858744