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Drug Dev Ind Pharm. 2010 Oct;36(10):1168-76. doi: 10.3109/03639041003695071.

Physicochemical studies of binary eutectic of ibuprofen and ketoprofen for enhanced transdermal drug delivery.

Author information

1
Department of Pharmaceutical Sciences, Arnold & Marie Schwartz College of Pharmacy and Health Sciences, Long Island University, Brooklyn, NY, USA.

Abstract

METHODS:

The thermodynamic, eutectic, and crystalline properties of ibuprofen and ketoprofen binary mixtures were investigated using differential scanning calorimetry (DSC) and X-ray powder diffractometry (XRPD).

RESULTS:

The DSC studies showed that melting point (61 degrees C), enthalpy (11.3 kJ/mol), and entropy of fusion (33.7 J/K/mol) of the binary eutectic were significantly lower than those of the individual anti-inflammatory drugs (NSAIDs). Due to the melting-point depression and enhanced skin lipid solubility, the steady-state flux of ibuprofen and ketoprofen from preparations of the binary eutectic increased as compared to pure NSAIDs using shed snakeskin as a model membrane. The NSAID membrane flux values were calculated by flux ratio equations based on drug thermodynamic data, and compared to experimental values obtained from permeation studies.

CONCLUSION:

The proposed flux ratio equations correctly predicted flux increase.

PMID:
20367290
DOI:
10.3109/03639041003695071
[Indexed for MEDLINE]

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