Review on Liquid Crystals

M. Pradeep Kumar*, M. Purushothaman, M. Siddeswara, M. Santhosh Raja, S. Yasmin
Vasavi Institute of Pharmaceutical Sciences, Kadapa, Andhra Pradesh, India-516247

A B S T R A C T
Liquid crystalline systems (mesophases) have been investigated as modern formulations. Various categories of drugs are studied for liquid crystals as drug delivery systems. Crystalline solids are characterized by long-range positional and orientational order in three dimensions. LCs are classified by their method of preparation into the Lyotropic and thermo tropic LCs. Therapeutic compounds of diverse physicochemical properties such as analgesics, antibiotics, antifungal, anticancer, vitamins, antiasthmatic, immunosuppressive etc. have been either incorporated or itself used for the formation of the LCs with some very encouraging results.
Keywords: Liquid crystals, Lytrotropic crystals, Lcs, Differential scanning calorimetry