Sixty-six samples of commercial propranolol hydrochloride preparations in Taiwan area were taken at various time of the fiscal year for analysis. For each sample, weight variation, disintegration, identification and assay were performed according to the methods described in the Ch. P. Ⅲ. All samples passed both weight variation and disintegration test. As to assay, results showed that the highest contains 109.5% while the lowest contains 90.5% of the labeled amount of Propranolol Hydrochloride. Three of the samples failed to fulfill the assay specification of Ch. P.Ⅲ, which is 92.5-107.5%.