121470-24-4Relevant articles and documents
Synthesis of 9-deoxo-9a-aza-9a-homoerythromycin A 11,12-hydrogen borate and azithromycin 11,12-hydrogen borate. A new procedure to obtain azithromycin dihydrate
Bayod-Jasanada,Carbajo,Lopez-Ortiz
, p. 7479 - 7481 (1997)
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Process of preparing a crystalline azithromycin monohydrate
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Page/Page column 5, (2008/06/13)
The present invention provides a process of preparing a crystalline azithromycin monohydrate. The process involves dissolving azithromycin in a solution containing ethanol, adding the dissolved azithromycin into water to precipitate the crystals, isolating and drying the precipitate to a water content of about 5% (w/w) to about 7% (w/w). The resulting azithromycin monohydrate is stable, exhibiting less than 2% degradation, and non-hydroscopic.
Stable non-dihydrate azithromycin oral suspensions
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Page/Page column 16, (2008/06/13)
This invention relates to a powder for oral suspension, and an oral suspension made there from, which comprises non-dihydrate azithromycin and an azithromycin conversion stabilizing excipient, wherein said excipient reduces the conversion of the form of azithromycin, when placed in suspension, to another form of azithromycin. This invention further relates to a method for reducing the conversion of a form of non-dihydrate azithromycin, in an oral suspension, by adding a surface tension reducing excipient that reduces the surface tension of the aqueous vehicle. Furthermore, this invention relates to a method for reducing the conversion of a non-dihydrate azithromycin, in an unflavored oral suspension, by raising the viscosity of the oral suspension, and in a flavored oral suspension by lowering the viscosity of the oral suspension.