 It has been discovered that two types of said receptor exist, the CysLT1 receptor as well as the CysLT2 receptor.Leukotriene-receptor antagonists is a special class of drug, formulated as tablets that have both an anti-inflammatory effect as well as a bronchodilating effect.The development of leukotriene receptor antagonist started with screening a large number of compounds and designing quinoline and structural analogues.