Transcription of USP <51> Antimicrobial Effectiveness Testing
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USP <51> Antimicrobial Effectiveness Testing2 2019 USP What sorts of pharmacopeial articles might benefit from the inclusion of an Antimicrobial preservative?Product Categories 23 2019 USP Category 1: Injections, other parenterals including emulsions, otic products, sterile nasal products, and ophthalmic products made with aqueous bases or vehicles. Category 2: Topically used products made with aqueous bases or vehicles, nonsterile nasal products, and emulsions, including those applied to mucous membranes. Product Categories4 2019 USP Category 3: Oral products, other than antacids, made with aqueous bases or vehicles.
If the diluted product exhibits antimicrobial properties, specific neutralizers may need to be incorporated into the diluents or the recovery media. The ability of the procedure to measure preservative efficacy may be compromised if the method suitability requires significant dilution (10 −2 or 10 −3) as this will affect the measured recovery
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