INTRODUCTION Adolescents and youngsters 6 years old and up can take valsartan thanks to the drug’s approval by the Food and Drug Administration (FDA) to treat hypertension. It has been extensively utilized to treat hypertension since its launch in 1996 because of its effectiveness and the fact that patients tolerate it well. 1 As a white powder, valsartan is found in nature. While it dissolves almost completely in ethanol and methanol (99.5% solubility), water is an extremely poor solvent. Its chemical name is 2S, and its molecular formula is C 24 H 29 N 5 O 3 (Figure 1). Its molecular weight is 435.52, butanoic acid, which is a ring-shaped molecule, is a ketone molecule. 2 Novartis was the company that initially created valsartan. To treat hypertension, it is used either singly or in conjunction with other medications. 3,4 Angiotensin II receptor blockers (ARBs) include valsartan. The renin-angiotensin pathway culminates with angiotensin II, the last messenger. Blood pressure is raised by the effects of vasoconstriction and fluid retention brought about by the binding of angiotensin II to angiotensin1 receptors. 5 Because of this, their action is analogous to that of ACE inhibitors, which prevent ACE from producing angiotensin II. 6 However, some angiotensin II can be produced via non-ACE routes. 7,8 Additionally, ACE inhibitors reduce the breakdown of bradykinin, which may contribute to both the positive and negative effects of this class of medications. 9,10 Analytical Method Validation What is method validation? Laboratory studies validate an analytical method when they guarantee that the method’s performance attributes match the needs of the intended analysis application. 11 Figure 1: Structure of valsartan ABSTRACT In order to accurately determine valsartan (API), this work aims to build a straightforward and exact UV spectroscopic approach. To improve sensitivity and accuracy, the procedure entails methodically optimizing experimental parameters, including solvent choice and wavelength selection. The produced stock solutions were tested for absorbance at 249 nm using a UV spectrophotometer. With %RSD values below 2% for both intra- and inter-day, the devised approach was determined to be quite accurate. At each additional concentration, the approach was shown to be accurate, yielding good drug recoveries ranging from 98 to 101%. The process was validated for linearity, specificity, accuracy, precision and limit of detection (LoD) and limit of quantification (LoQ) as per International Council of Harmonization (ICH) criteria. Its dependability for quantitative analysis of valsartan in pharmaceutical formulations was demonstrated. This UV spectroscopic approach offers a cost-effective and efficient alternative for routine quality control in pharmaceutical industries. Keywords: Valsartan, Angiotensin, Receptor, Hyperaldosteronism, UV spectroscopy, Method validation. International Journal of Pharmaceutical Quality Assurance (2024); DOI: 10.25258/ijpqa.15.2.49 How to cite this article: Dhobale G, Kanawade S, Hande R, Dhobale S, Tare H. Analytical Method Development by Using UV-Spectrophotometer for Estimation of Valsartan in Bulk. International Journal of Pharmaceutical Quality Assurance. 2024;15(2):854-860. Source of support: Nil. Conflict of interest: None Analytical Method Development by Using UV-Spectrophotometer for Estimation of Valsartan in Bulk Gayatri Dhobale 1* , Saurabh Kanawade 1 , Rupali Hande 1 , Shankar Dhobale 1 , Harshal Tare 2 1 Vishal Institute of Pharmaceutical Education and Research, Ale, Affiliated to Savitribai Phule Pune University, Pune, Maharashtra, India. 2 Dr. Harshal Tare (OPC) Pvt. Ltd., Jalgaon, Maharashtra, India. Received: 16 th January, 2024; Revised: 10 th March, 2024; Accepted: 17 th May, 2024; Available Online: 25 th June, 2024 RESEARCH ARTICLE *Author for Correspondence: globhe@gmail.com