Allaa Hussein Mhdi, Sadeem Subhi Abed 2022. Determination of Nifedipine drug in Pure and Pharmaceutical Preparations by Normal Flow Injection Analysis using Sulfamethaxazole Drug as Chromogenic Reagent. Pakistan Journal of Medical & Health Sciences. 16, 08 (Oct. 2022), 622. DOI:https://doi.org/10.53350/pjmhs22168622.