Cimetidine is the selective H2 receptor antagonist and inhibits the secretion of hydrochloric acid in the stomach. In the present study, simple titrimetric method was developed. Respective quantities of Cimetidine were taken in aqueous methanol and acetic acid titrated against 0.1N hydrochloric acid and 0.1N perchloric acid using methyl orange and crystal violet as indicators for neutralization and non-aqueous titrations. All the titrations are carried out by running simultaneous blank determinations. The final titer values are subtracted from blank to get actual amount of acid consumed was determined. These methods were found to be sensitive and inexpensive, do not require any sample processing steps and can be utilized for estimation of cimetidine in bulk and formulations.
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