Validated Stability Indicating RP-HPLC Method for Simultaneous Estimation of Codeine Phosphate and Chlorpheniramine Maleate from Their Combined Liquid Dosage Form

Table 4

Solution stability results.

Time intervals	CP	CPM
% assay initial	100.3	99.5
% assay after 12 hrs	100.7	99.6
% assay after 24 hrs	100.4	99.3