Alerfix Total Tablet SR is a aggregate of 3 medicines: Ambroxol, Levocetirizine and Montelukast. Ambroxol is a mucolytic which thins and loosens mucus (phlegm), making it simpler to cough out. Levocetirizine is an antiallergic which relieves hypersensitivity signs like runny nostril, watery eyes and sneezing. Montelukast is a leukotriene antagonist. It works through blocking off the movement of leukotriene, a chemical messenger. This reduces irritation withinside the airlines and nostril and improves your signs.