Cite this article:
Amir Alhaj Sakur*, Shaza Affas. Direct Spectrophotometric Determination of Sildenafil Citrate in Pharmaceutical Preparations Via Complex Formation with Two sulphonphthalein acid dyes. Research J. Pharm. and Tech. 2017; 10(4): 1191-1196. doi: 10.5958/0974-360X.2017.00214.1