Analytical method development of different doses form & API of any Drug molecule is a challenging task for a scientist nowadays. If the molecule is brand new, it adds up even more difficulties. Rilpivirine is a new anti-retro viral drug used to treat HIV infected patients. Recently this drug has received USFDA approval, but as of now no single method is available to determine the drug by using UV-Visible Spectrophotometer. This book is aiming to address that gap with vivid methodology, proper explanation & description. An effort has been made to focus on the way of doing method development & its validation according to official agencies in maximum parameters along with all UV-Spectrums, Figures & Tables. Written in a lucid manner, this book is a must have for students those who are pursuing Master or Bachelor degree in Pharmacy or analytical chemistry or any other related courses. Researchers in this field and even company personnel analyzing this drug will find this book helpful.