## **Core Concept**
Disodium cromoglycate, also known as cromolyn sodium, is a medication used to prevent allergic reactions. It works by stabilizing mast cells and preventing the release of histamine and other mediators. The primary use of disodium cromoglycate is in the management of allergic conditions.

## **Why the Correct Answer is Right**
The correct answer involves the use of disodium cromoglycate via inhalation for the management of asthma, particularly allergic asthma. It can also be administered topically in the eyes for allergic conjunctivitis and intranasally for allergic rhinitis. The inhaled route is specifically beneficial for directly targeting the lungs and airways, reducing systemic side effects.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option might suggest oral administration, which is not the preferred or primary route for disodium cromoglycate due to poor absorption from the gastrointestinal tract, making it less effective for treating conditions like asthma.
- **Option B:** This could imply intravenous administration, which is not a standard or common route for disodium cromoglycate. The drug is not typically given intravenously for the management of allergic conditions.
- **Option C:** This might imply sublingual administration, which is not a standard route for disodium cromoglycate.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that disodium cromoglycate is most effective as a prophylactic agent and must be used regularly to prevent symptoms, rather than to treat acute symptoms. It is particularly useful for patients with allergic asthma, allergic rhinitis, and allergic conjunctivitis.

## **Correct Answer:** . Inhalation.