New Cocrystals of Hydrochlorothiazide: Optimizing Solubility and Membrane Diffusivity

Gopi, Shanmukha Prasad and Banik, Manas and Desiraju, Gautam R (2017) New Cocrystals of Hydrochlorothiazide: Optimizing Solubility and Membrane Diffusivity. In: CRYSTAL GROWTH & DESIGN, 17 (1). pp. 308-316.

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Abstract

Hydrochlorothiazide (HCT) is a diuretic drug with poor solubility and permeability. Physicochemical properties of HCT have been modified by cocrystallization with piperazine (PPZ), tetramethylpyrazine (TMPZ), picolinamide (PCM), isoniazid (INZ), malonamide (MAM), and isonicotinic acid (INIC) using mechanochemical grinding (liquid assisted and neat). The solids obtained were characterized by single crystal X-ray diffraction (SCXRD), powder X-ray diffraction, Fourier transform infrared spectroscopy, and differential scanning calorimetry and subjected to solubility and membrane permeability studies. SCXRD showed that the N-H...O sulfonamide catemer synthons found in the stable polymorph of pure HCT have been replaced by drug-coformer heterosynthons in the cocrystals. HCT-PPZ and HCT-PCM cocrystals showed improvement in solubility and membrane permeability/diffusion compared to the parent active pharmaceutical ingredient. The improved solubility and diffusion rates are due to the drug-coformer interactions in the new solid forms. A structure-property relationship is examined to evaluate the solubility and diffusion rates of the new solid forms. The cocrystal with INIC, which could not be prepared previously by conventional methods, was obtained by prolonged grinding for 6 days.

Item Type:	Journal Article
Publication:	CRYSTAL GROWTH & DESIGN
Additional Information:	Copy right for this article belongs to the AMER CHEMICAL SOC, 1155 16TH ST, NW, WASHINGTON, DC 20036 USA
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	10 Feb 2017 05:03
Last Modified:	10 Feb 2017 05:03
URI:	http://eprints.iisc.ac.in/id/eprint/56215

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