Abstract
Novel ternary systems with β-cyclodextrin or maltodextrin and triethanolamine as the third component were developed with the aim of improving the oral bioavailability of furosemide. These new solids were characterized by solid-state nuclear magnetic resonance, Fourier transform infrared and Raman spectroscopy, X-ray powder diffractometry, scanning electron microscopy, thermogravimetric analysis, and differential scanning calorimetry. The solubility, dissolution and stability (chemical and physical) were studied. Among the most important results, it was observed that both ternary systems showed an important enhancement in the solubility of the drug. In particular, the system obtained by combination of β-cyclodextrin and TEA exhibited improvement in the dissolution profiles and photo-stability of furosemide compared with the binary system previously reported. Moreover, this system constitutes an interesting therapeutic alternative as it did not produce cellular toxicity compared with free furosemide. In conclusion, the results obtained revealed that this ternary system establishes a promising approach for oral delivery of the drug.
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