title: Stability study of a sulfadimidine-containing medicated premix and its mixture with farm feed.
abstract: The objective of this paper was to study the stability of a medicated premix and a medicated farm feed containing sulfadimidine as the active ingredient. The medicated premix is supplied as powdered form and administered orally after mixing with animal feed. The sulfadimidine analytical method described in United States Pharmacopoeia 23 cannot be used to carry out the stability study because of its lack of specificity for different degradation products. Therefore, a high-performance liquid chromatography method was developed to assay sulfadimidine. This method was optimized and validated for the stability study. According to International Committee Harmonization (ICH) guidelines, the samples were stored under long-term testing and accelerated conditions for the stability study of the premix and the medicated farm feed. Sulfadimidine degradation was not detected in either form under any of the conditions studied.
authors: Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, Complutense University of Madrid, 28040, Madrid, Spain.
authors: J A
authors: JA
authors: Bernabéu
authors: A I
authors: AI
authors: Torres-Suárez
authors: M E
authors: ME
authors: Gil-Alegre
authors: M A
authors: MA
authors: Camacho
mesh_terms: D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D000890:Anti-Infective Agents / Q000032:analysis*; D002851:Chromatography, High Pressure Liquid; D004355:Drug Stability; D005511:Food Handling; D015203:Reproducibility of Results; D013418:Sulfamethazine / Q000032:analysis*; D013552:Swine; D013997:Time Factors
chemical_list: D000890:Anti-Infective Agents; D013418:Sulfamethazine