Chlorpheniramine Maleate and Phenylpropanolamine Hydrochloride Extended-Release Tablets
» Chlorpheniramine Maleate and Phenylpropanolamine Hydrochloride Extended-Release Tablets contain not less than 90.0 percent and not more than 110.0 percent of the labeled amounts of chlorpheniramine maleate (C16H19ClN2·C4H4O4) and phenylpropanolamine hydrochloride (C9H13NO·HCl).
Packaging and storage
Preserve in tight, light-resistant containers.
USP Reference standards 11
USP Chlorpheniramine Maleate RS. USP Phenylpropanolamine Hydrochloride RS.
Identification
A:
The retention time of the major peak for chlorpheniramine maleate in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay for chlorpheniramine maleate.
B:
The retention time of the major peak for phenylpropanolamine hydrochloride in the chromatogram of the Assay preparation corresponds to that in the chromatogram of the Standard preparation, as obtained in the Assay for phenylpropanolamine hydrochloride.
Dissolution 711
Medium:
water; 900 mL.
Apparatus 2:
50 rpm.
Times:
3, 6, and 12 hours.
Procedure
Determine the amounts of C16H19ClN2·C4H4O4 and C9H13NO·HCl dissolved by employing the methods set forth in the Assay for chlorpheniramine maleate and the Assay for phenylpropanolamine hydrochloride.
Tolerances
The percentages of the labeled amounts of C16H19 ClN2·C4H4O4 and C9H13NO·HCl dissolved at the specified times conform to Acceptance Table 2.
Uniformity of dosage units 905:
meet the requirements.
Assay for chlorpheniramine maleate
Mobile phase, Standard preparation, System suitability solution, and Chromatographic system
Proceed as directed in the Assay for chlorpheniramine maleate under Chlorpheniramine Maleate and Phenylpropanolamine Hydrochloride Extended-Release Capsules.
Assay preparation
Weigh and finely powder not fewer than 20 Tablets. Transfer an accurately weighed portion of the powder, equivalent to about 40 mg of chlorpheniramine maleate, to a suitable container, add 100 mL of water and 10 mL of phosphoric acid solution (1 in 20), and heat gently until the powder is fully dispersed. Cool to room temperature, and transfer an accurately measured volume of this solution, equivalent to about 0.8 mg of chlorpheniramine maleate, to a 100-mL volumetric flask. Dilute with water to volume, mix, and filter. Quantitatively dilute a portion of this solution, if necessary, with phosphoric acid solution (1 in 1000) to obtain a solution having a concentration of about 8 µg of chlorpheniramine maleate per mL.
Procedure
Separately inject equal volumes (about 10 µL) of the Standard preparation and the Assay preparation into the chromatograph, record the chromatograms, and measure the responses for the chlorpheniramine peaks. Calculate the quantity, in mg, of chlorpheniramine maleate (C16H19ClN2·C4H4O4) in the portion of Tablets taken by the formula:
100C(rU / rS)
in which C is the concentration, in µg per mL, of USP Chlorpheniramine Maleate RS in the Standard preparation; and rU and rS are the chlorpheniramine peak responses obtained from the Assay preparation and the Standard preparation, respectively.
Assay for phenylpropanolamine hydrochloride
Mobile phase and Chromatographic system
Proceed as directed in the Assay for chlorpheniramine maleate under Chlorpheniramine Maleate and Phenylpropanolamine Hydrochloride Extended-Release Capsules.
Standard preparation
Dissolve an accurately weighed quantity of USP Phenylpropanolamine Hydrochloride RS in water to obtain a solution having a known concentration of about 2.5 mg per mL. Transfer 1.0 mL of this solution to a 50-mL volumetric flask, add 5 mL of methanol, dilute with phosphoric acid solution (1 in 1000) to volume, and mix.
System suitability solution
Proceed as directed in the Assay for phenylpropanolamine hydrochloride under Chlorpheniramine Maleate and Phenylpropanolamine Hydrochloride Extended-Release Capsules.
Assay preparation
Weigh and finely powder not fewer than 20 Tablets. Transfer an accurately weighed quantity of the powder, equivalent to about 500 mg of phenylpropanolamine hydrochloride, to a suitable container, add 100 mL of water and 10 mL of phosphoric acid solution (1 in 20), and heat gently until the powder is fully dispersed. Cool to room temperature, and transfer an accurately measured volume of the solution, equivalent to about 5 mg of phenylpropanolamine hydrochloride, to a 100-mL volumetric flask. Dilute with water to volume, mix, and filter.
Procedure
Separately inject equal volumes (about 10 µL) of the Standard preparation and the Assay preparation into the chromatograph, record the chromatograms, and measure the responses for the phenylpropanolamine peaks. Calculate the quantity, in mg, of phenylpropanolamine hydrochloride (C9H13NO·HCl) in the portion of Tablets taken by the formula:
100C(rU / rS)
in which C is the concentration, in mg per mL, of USP Phenylpropanolamine Hydrochloride RS in the Standard preparation; and rU and rS are the phenylpropanolamine peak responses obtained from the Assay preparation and the Standard preparation, respectively.
Auxiliary Information
Please check for your question in the FAQs before contacting USP.
USP32NF27 Page 1911
Pharmacopeial Forum: Volume No. 31(1) Page 145
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