10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 2 2013 (April - June) The Indian subcontinent is enriched by a variety of flora- both medicinal and aromatic plant s. This extensive flora has been greatly utilized as a source of many drugs in the Indian traditional systems of medicine. This study aims at exploring the pharmacognosy, phytochemistry, physic-chemical and TLC analysis of a siddha polyherbal formulation Nilavembu chooranam and Nilavembu tablet. The raw materials were authenticated by a pharmacognosist. The macroscopic characters and the powder microscopy of the chooranam revealed the presence of all those ingredients in the final product. The preliminary phytochemical analysis of nilavembu chooranam and nilavembu Tablet revealed the presence of Glyccoside,Tannins, alkaloids, Flavonoids, in Thin layer chromatographic analysis the solvent front was standardized as petroleum ether :chloroform:methanol:1:0:5:2 the methanol, chloroform and ether extracts were fractionized. C.BALAKRISHNAN M.SENTHILKUMAR AND M.VISWANATH Polyherbal, Nilavembu, phytochemistry, Microscopy 180-186