What is the mode of action of Sodium Cromoglycate ?
**Core Concept**
Sodium Cromoglycate is a mast cell stabilizer used in the management of allergic conditions such as allergic conjunctivitis, asthma, and rhinitis. Its primary mechanism of action involves stabilizing mast cell membranes, thereby preventing the release of histamine and other chemical mediators.
**Why the Correct Answer is Right**
The correct answer involves the stabilization of mast cell membranes through the inhibition of calcium ion influx. This action prevents the activation of phospholipase A2, which is essential for the release of histamine and other mediators from mast cells. As a result, Sodium Cromoglycate effectively reduces the symptoms of allergic reactions.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect as Sodium Cromoglycate does not act as a bronchodilator, unlike other medications used in asthma management.
* **Option B:** This option is incorrect as Sodium Cromoglycate does not have a significant effect on the H1 receptor, which is a target for antihistamines.
* **Option C:** This option is incorrect as Sodium Cromoglycate is not an inhibitor of cyclooxygenase (COX) enzymes, which are involved in the production of prostaglandins.
**Clinical Pearl / High-Yield Fact**
Sodium Cromoglycate is often used as a prophylactic agent to prevent allergic reactions, and its mode of action is distinct from that of antihistamines and corticosteroids. It is an important addition to the management of allergic conditions, particularly in patients who are sensitive to other medications.
**Correct Answer:** C. Stabilization of mast cell membranes by inhibiting calcium ion influx.