title: Amoxicillin sodium-potassium clavulanate: evaluation of gamma radiation induced effects by liquid chromatography on both the individual drugs and their combination.
abstract: The effects of gamma irradiation on the stability of potassium clavulanate, amoxicillin sodium and their combination were investigated. A decrease in purity and increase in degradation products up to 30 days after the irradiation were evaluated by reversed phase HPLC. The comparison between unirradiated and irradiated amoxicillin sodium, performed within 24 h following the irradiation process, showed no significant increase in the pre-existing impurities and no evidence of newly induced degradation products. On the contrary, an appreciable increase in the content of some impurities was evidenced 30 days after the irradiation. The chromatographic profile of irradiated potassium clavulanate showed the appearance of one unidentified new product and a slight increase of one pre-existing impurity. No further change in the impurity content was noted 30 days after the irradiation. The amoxicillin sodium-potassium clavulanate combination underwent the same kind of radiation induced degradation as the single compounds.
authors.affiliation: Pharmaceutical Chemistry Laboratory, Istituto Superiore di Sanità, Rome, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Valvo
authors.forename: L
authors.initials: L
authors.lastname: Manna
authors.forename: R
authors.initials: R
authors.lastname: Alimenti
authors.forename: S
authors.initials: S
authors.lastname: Alimonti
authors.forename: P
authors.initials: P
authors.lastname: Bertocchi
authors.forename: E
authors.initials: E
authors.lastname: Ciranni
mesh_terms: D000658:Amoxicillin / Q000032:analysis / Q000528:radiation effects*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D019818:Clavulanic Acid / Q000032:analysis / Q000528:radiation effects*; D004338:Drug Combinations; D004355:Drug Stability; D005069:Evaluation Studies as Topic; D005720:Gamma Rays
chemical_list: D004338:Drug Combinations; D019818:Clavulanic Acid; D000658:Amoxicillin