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Physical compatibility of plazomicin with select i.v. drugs during simulated Y-site administration.
American Journal of Health-system Pharmacy : AJHP 2018 July 16
PURPOSE: The results of a study to determine the physical compatibility of plazomicin sulfate solution during simulated Y-site administration with 92 i.v. drugs are reported.
METHODS: Plazomicin injection solution (500 mg/10 mL) was diluted in 0.9% sodium chloride or 5% dextrose for injection to a final volume of 50 mL (final plazomicin concentration, 24 mg/mL), consistent with a 15-mg/kg dose administered to an 80-kg patient (i.e., 1,200 mg). All other i.v. drugs were reconstituted according to manufacturers' recommendations and diluted with 0.9% sodium chloride or 5% dextrose for injection to the upper range of concentrations used clinically. Y-site conditions were simulated by mixing 5 mL of plazomicin solution with 5 mL of tested drug solutions in a 1:1 ratio. Solutions were assessed for visual (via color and Tyndall beam testing), turbidity (using a laboratory-grade turbidimeter), and pH changes over a 60-minute observation period. Incompatibility was defined a priori as precipitation, color change, a positive Tyndall test, or a turbidity change of ≥0.5 nephelometric turbidity units at any time during the 60-minute observation period.
RESULTS: Plazomicin was physically compatible with 79 of the 92 drugs tested. Determinations of physical incompatibility with plazomicin were made for 13 drugs: albumin, amiodarone, amphotericin B deoxycholate, anidulafungin, calcium chloride, daptomycin, esomeprazole, heparin, levofloxacin, methylprednisolone, micafungin, phenytoin, and propofol, CONCLUSION: Plazomicin at a concentration of 24 mg/mL was physically compatible with 85% of the drugs tested, including 31 of 36 antimicrobial agents.
METHODS: Plazomicin injection solution (500 mg/10 mL) was diluted in 0.9% sodium chloride or 5% dextrose for injection to a final volume of 50 mL (final plazomicin concentration, 24 mg/mL), consistent with a 15-mg/kg dose administered to an 80-kg patient (i.e., 1,200 mg). All other i.v. drugs were reconstituted according to manufacturers' recommendations and diluted with 0.9% sodium chloride or 5% dextrose for injection to the upper range of concentrations used clinically. Y-site conditions were simulated by mixing 5 mL of plazomicin solution with 5 mL of tested drug solutions in a 1:1 ratio. Solutions were assessed for visual (via color and Tyndall beam testing), turbidity (using a laboratory-grade turbidimeter), and pH changes over a 60-minute observation period. Incompatibility was defined a priori as precipitation, color change, a positive Tyndall test, or a turbidity change of ≥0.5 nephelometric turbidity units at any time during the 60-minute observation period.
RESULTS: Plazomicin was physically compatible with 79 of the 92 drugs tested. Determinations of physical incompatibility with plazomicin were made for 13 drugs: albumin, amiodarone, amphotericin B deoxycholate, anidulafungin, calcium chloride, daptomycin, esomeprazole, heparin, levofloxacin, methylprednisolone, micafungin, phenytoin, and propofol, CONCLUSION: Plazomicin at a concentration of 24 mg/mL was physically compatible with 85% of the drugs tested, including 31 of 36 antimicrobial agents.
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