Cloxacillin Sodium for Oral Solution
» Cloxacillin Sodium for Oral Solution is a dry mixture of Cloxacillin Sodium and one or more suitable buffers, colors, flavors, and preservatives. It contains the equivalent of not less than 90.0 percent and not more than 120.0 percent of the labeled amount of cloxacillin (C19H18ClN3O5S).
Packaging and storage— Preserve in tight containers.
Uniformity of dosage units 905
for solid packaged in single-unit containers: meets the requirements.
Deliverable volume 698: meets the requirements.
pH 791: between 5.0 and 7.5, in the solution constituted as directed in the labeling.
Water, Method I 921: not more than 1.0%.
Buffer, Mobile phase, Standard preparation, and Chromatographic system— Proceed as directed in the Assay under Cloxacillin Sodium.
Assay preparation— Constitute Cloxacillin Sodium for Oral Solution as directed in the labeling. Transfer an accurately measured volume of the resulting solution, equivalent to about 125 mg of cloxacillin, to a 250-mL volumetric flask, dilute with Buffer to volume, mix, and stir for 15 minutes. Filter about 25 mL of this mixture, discarding the first 5 mL of the filtrate. Use the clear filtrate as the Assay preparation.
Procedure— Proceed as directed for Procedure in the Assay under Cloxacillin Sodium. Calculate the quantity, in mg, of cloxacillin (C19H18ClN3O5S) in the portion of Cloxacillin Sodium for Oral Solution taken by the formula:
0.25CE(rU / rS)
in which the terms are as defined therein.
Auxiliary Information— Please check for your question in the FAQs before contacting USP.
Topic/Question Contact Expert Committee
Monograph Ahalya Wise, M.S.
(MDANT05) Monograph Development-Antibiotics
Reference Standards Lili Wang, Technical Services Scientist
USP32–NF27 Page 2005
Pharmacopeial Forum: Volume No. 28(4) Page 1092
Chromatographic Column—
Chromatographic columns text is not derived from, and not part of, USP 32 or NF 27.