Stability of gentamicin sulfate and tobramycin sulfate in extemporaneously prepared ophthalmic solutions at 8°C
| Autor: | J M Trang, H A Helms, R D Lander, H A McBride, D R Martinez |
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| Rok vydání: | 1991 |
| Předmět: | |
| Zdroj: | American Journal of Health-System Pharmacy. 48:507-509 |
| ISSN: | 1535-2900 1079-2082 |
| DOI: | 10.1093/ajhp/48.3.507 |
| Popis: | The stability of gentamicin sulfate and tobramycin sulfate in fortified ophthalmic solutions stored under refrigeration was studied. Fortified gentamicin ophthalmic solution and fortified tobramycin ophthalmic solution were prepared to a final theoretical concentration of 13.6 mg/mL by using commercially available ophthalmic and injectable solutions. Volumes of each solution were packaged in plastic bottles and refrigerated at 4-8 degrees C. Samples of each solution were analyzed by fluorescence polarization immunoassay on days 0 (before refrigeration), 1, 2, 3, 4, 7, 14, 28, 63, and 91. To validate the method, identical solutions were prepared, stored under refrigeration at 4-8 degrees C, and analyzed by a stability-indicating high-performance liquid chromatographic assay on days 0 (before refrigeration), 9, 28, 56, and 91. Fluorescence polarization immunoassay showed the mean concentrations of gentamicin and tobramycin on day 91 to be 104.4% and 97.4%, respectively, of the time 0 concentrations; the difference was not significant in either case. HPLC validated these results; the mean concentration of gentamicin and tobramycin on day 91 was 103.3% and 101.2%, respectively, of the mean day 0 concentrations. Gentamicin and tobramycin in ophthalmic solutions prepared by mixing ophthalmic and injectable products and stored in plastic bottles at 4-8 degrees C were stable for three months. |
| Databáze: | OpenAIRE |
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