Which of the following is a mast cell stabilizer: September 2005
**Core Concept**
The question tests the student's knowledge of pharmacological agents that stabilize mast cells, preventing the release of histamine and other mediators. **Mast cell stabilizers** are crucial in managing allergic reactions and diseases such as asthma. These agents work by inhibiting the release of inflammatory substances from mast cells.
**Why the Correct Answer is Right**
Although the specific correct answer is not provided, common **mast cell stabilizers** include cromolyn sodium. This drug acts by inhibiting the release of histamine and other mediators from mast cells, thereby preventing allergic responses. It is often used in the treatment of allergic conditions such as asthma and allergic rhinitis.
**Why Each Wrong Option is Incorrect**
**Option A:** Without the specific details of each option, it's challenging to provide a precise explanation for why each is incorrect. However, incorrect options might include drugs that are not known for their mast cell stabilizing properties.
**Option B:** Similarly, without specifics, it's difficult to address why this option is incorrect, but it might involve a drug with a different mechanism of action.
**Option C:** This option could be incorrect if it represents a drug that does not stabilize mast cells but instead works through a different pharmacological mechanism.
**Option D:** This might be incorrect for similar reasons as the other options, lacking the specific action of mast cell stabilization.
**Clinical Pearl / High-Yield Fact**
A key point to remember is that **cromolyn sodium** is a classic example of a mast cell stabilizer, often used in the prophylactic treatment of asthma and other allergic conditions. Its mechanism of action highlights the importance of understanding pharmacodynamics in treating diseases.
**Correct Answer:** Correct Answer: D. Cromolyn sodium.