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OBJECTIVE To synthesize p-toluenesulfonic acid(PTS) and famotidine(FMT) cocrystal in order to improve thesolubility of famotidine in water and the permeability. OBJECTIVE The cocrystal was prepared by solvent evaporation method combined with ultrasound. The cocrystal was characterized by scanning electron microscopy, differential scanning calorimetry, thermogravimetric analysis, infrared spectroscopy and powder X-ray diffraction. The single crystal structure of FMT-PTS-H2O(1∶1∶1) was successfully obtained, and the solubility and permeability of the newly synthesized cocrystal were studied. RESULTS After the formation of cocrystal, the water solubility and permeability of FMT increased by 1.54 and 2.29 times, respectively. CONCLUSION Compared with FMT, the solubility and permeability of FMT after the formation of cocrystal were improved. This study provides a method for improving the permeability of biopharmaceutics classification system(BCS)Ⅲ drugs, which will contribute to the development of low permeability drugs.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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