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Stability of Metronidazole Suspensions

Author(s):  Donnelly Ronald F, Ying James

Issue:  May/Jun 2015 - Volume 19, Number 3
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Page(s):  248-251

Stability of Metronidazole Suspensions Page 1
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Stability of Metronidazole Suspensions Page 4

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Abstract:  Metronidazole is an antiprotozoal agent used in the treatment of bacterial and protozoal anaerobic infections. The objectives of this study were to develop concentrated metronidazole suspensions that are inexpensive and easy to prepare and determine the stability of these suspensions after storage in amber polyvinyl chloride bottles at room temperature (23OC) and under refrigeration (5OC). Metronidazole suspensions (50 mg/mL) were prepared from powder using Ora-Blend or simple syrup as the vehicles. Samples were collected in triplicate from each container on days 0, 7, 14, 28, 56, and 93. Samples were assayed using a high-performance liquid chromatography method that had been validated as stability indicating. Color, change in physical appearance, and pH were also monitored at each time interval. There was no apparent change in color or physical appearance. The pH values changed by less than 0.20 units over the 93 days. The stability of metronidazole suspensions compounded from United States Pharmacopeia powder using Ora-Blend or simple syrup and packaged in amber polyvinyl chloride bottles was determined to be 93 days when stored at either room temperature or under refrigeration.

Related Keywords: Ronald F. Donnelly, MSc (Chem), BScPhm, James Ying, BScPhm, metronidazole suspension, antiprotozoal agent, protozoal infection, bacterial infection, stability, storage temperature, drug cost

Related Categories: EXCIPIENTS, PEER-REVIEWED, STABILITIES, COMPATIBILITIES, DOSAGE FORMS/DRUG CARRIERS, INFECTIOUS DISEASE, STORAGE

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