Harrizul Rivai et al. 2021. Recent Study on Development and Validation of Loperamide Hydrochloride Tablet Analysis Method with Absorbance and Area under Curve Methods Spectrophotometrically. Technological Innovation in Pharmaceutical Research Vol. 3. (May 2021), 48–58. DOI:https://doi.org/10.9734/bpi/tipr/v3/1696C.