Dextromethorphan is used in cough syrups as

Question

Question

This question was previously asked in

ISRO Pharmacist Previous Year Question paper 2017

Answer 1

Correct Answer: Suppressant

Rationale:

Dextromethorphan is commonly used in over-the-counter cough syrups as a suppressant.
A cough suppressant works by affecting the signals in the brain that trigger the cough reflex. This action helps to reduce the frequency and intensity of coughing.
Dextromethorphan is particularly useful in treating dry coughs where no mucus is produced, helping to provide relief from persistent coughing episodes.

Explanation of Other Options:

Expectorant

Rationale: Expectorants help to thin and loosen mucus in the airways, making it easier to cough up. A common example is guaifenesin. Dextromethorphan does not have this property.

Mucolytic

Rationale: Mucolytics break down the structure of mucus, making it less thick and sticky. Acetylcysteine is an example of a mucolytic. Dextromethorphan does not function as a mucolytic.

Bronchodilator

Rationale: Bronchodilators relax the muscles around the airways, making it easier to breathe. Albuterol is a well-known bronchodilator. Dextromethorphan does not have bronchodilator effects.

Conclusion:

Among the given options, Dextromethorphan is correctly identified as a cough suppressant. It is effective in reducing the urge to cough, which is particularly beneficial for dry coughs. The other options, such as expectorants, mucolytics, and bronchodilators, serve different functions in respiratory treatment and do not align with the action of Dextromethorphan.

```