23/03/2022
👍Montelukast
A very common drug used in the treatment of asthma ,allergic rhinitis and bronchospasms.
👉How does it work?
Montelukast is a leukotriene receptor antagonist.
It blocks the effects of leukotrienes in the airways.
👉Now what is leukotriene and what is its effects ?
Leukotrienes are eicosanoid (20 Carbon polyunsaturated fatty acid) derivatives .They are mainly derived from Arachidonic acid (a 20 Carbon polyunsaturated fatty acid).
Arachidonic acid is stored in membrane phospholipids and when our body comes in contact with an allergic substance, the membrane phospholipids release arachidonic acid which then undergoes two pathways ---- 1. Cyclo-oxygenase pathway, 2.Lipoxygenase pathway.
Leukotrienes are synthesised via the lipoxygenase pathway.
Leukotrienes initiate a number of inflammatory responses and also cause tightening of airway muscles and the production of excess mucus and fluid .Besides , leukotrienes are powerful bronchoconstrictors and they also increase vascular permeability, promoting further inflammation.
As a result , a person may experience asthma attacks associated with bronchospasms.
👍Well, montelukast prevents the leukotrienes from exerting these effects and help to ease the symptoms of asthma, bronchospasms and allergic rhinitis.