UPSEE B.Pharma syllabus is as same as your intermediate syllabus. So you don't have learn anything new. The topics are already known to you. First you should make a proper study plan which you'll follow throughout your preparation. Then go through the entire syllabus and gather all the study materials.
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You should start your preparation with NCERT Textbooks as these books are mostly recommended by experts for having a basic concept over all the topics. Sometimes, many questions are directly asked from NCERTs. Prepare small parts from all the three sections daily. You can also concentrate on making your own notes. Short notes are helpful in revision times. Apart from preparing from books, you can go on solving sample papers and previous few years' question papers. Once done with the syllabus give mock tests regularly.