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- W4214691683 abstract "Sodium valproate, the most common solid form of valproic acid, is highly hygroscopic and carbamazepine has extremely low aqueous solubility. Producing a salt form of valproic acid with tromethamine and a cocrystal form of valproic acid with carbamazepine have been studied as two approaches to improve physicochemical properties of the intended drugs. Characterization methods including differential scanning calorimetry (DSC), powder X-ray diffraction (PXRD) and Fourier transform infrared spectroscopy (FTIR) are applied to characterize the synthesized salt and cocrystal. The stability of sodium valproate and tromethamine valproate were examined in 33, 53, 75 and 100 percent of relative humidity. The dissolution profile studies were performed in phosphate buffer media (pH = 6.8) for carbamazepine (a low soluble drug) and carbamazepine-valprocic acid cocrystal. Tromethamine valproate was physically more stable than sodium valproate in exposure to humidity. Carbamazepine-valproic acid cocrystal did not show an extreme improvement in dissolution profile when compared with carbamazepine, however after 24 hcocrystal was more soluble." @default.
- W4214691683 created "2022-03-02" @default.
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- W4214691683 date "2021-10-03" @default.
- W4214691683 modified "2023-10-16" @default.
- W4214691683 title "Crystal engineering of valproic acid and carbamazepine to improve hygroscopicity and dissolution profile" @default.
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- W4214691683 doi "https://doi.org/10.1080/03639045.2022.2045305" @default.
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