Features of Microbiological Analysis of the Quality of Soft Dosage Forms

Materials related to features of microbiological analysis of the purity of soft dosage forms are presented. Possible requirements for microbiological quality parameters of various soft dosage forms are analyzed. The applicability of a direct inoculation technique to obtain reliable quantitative determinations of microorganisms is proven using gel, ointment, and suppositories as examples. The accuracy (Kgr 75 – 107%) and intralaboratory precision (CV 2 – 6%) are calculated and fall within the required limits. The specificity of the method is considered for a particular working range established according to recommendations of the RF State Pharmacopoeia, i.e., up to 250 CFU/dish for bacteria and up to 50 CFU/dish for yeasts and molds. Features of microbiological analysis of the quality of patches and transdermal therapeutic systems are studied. The possibilities and limitations of a membrane filtration technique are shown using 83 series of 18 items meeting regulatory requirements as examples.