Physico-chemical and technological properties of sodium naproxen granules prepared in a high-shear mixer-granulator

✍ Scribed by Piera Di Martino; Ledjan Malaj; Roberta Censi; Sante Martelli

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 276 KB
• Volume: 97
• Category: Article
• ISSN: 0022-3549
• DOI: 10.1002/jps.21400

✦ Synopsis

In the present work, authors produced tablets of anhydrous sodium naproxen by wet granulation using a high-shear mixer-granulator. Drug hydrated to the tetrahydrated form, as observed by X-ray powder diffractometry. After wet granulation, authors then performed two different drying procedures, obtaining granules of different water content and crystallographic characteristics. The first procedure dried granules in the high-shear mixer-granulator by applying vacuum at room temperature (batch A), while the second employed the same apparatus and time, under vacuum at 408C (batch B). X-ray powder diffractometry revealed that the sodium naproxen (SN) contained in batch A granules was a mixture of dihydrated and tetrahydrated forms (as demonstrated by the coexistence of peaks typical of both hydrated forms), while that of batch B granules was a mixture of monohydrated and tetrahydrated forms. This means that differences in drying procedures could lead to products of different crystallographic properties. The behavior under compression was evaluated, revealing that batch A offered the best tabletability and compressibility. These results make it possible to conclude that differences in the crystallographic properties and water content of SN are such that different hydration/drying processes can alter the drug crystal form and thus the tabletability of the resulting granules.