What does the term "EN" refer to when administering a nasal spray?

The term "EN" in the context of administering a nasal spray refers to "each nostril." This indicates that the medication should be administered in both nostrils, ensuring that the spray reaches its target area effectively for optimal therapeutic effect.

Using "each nostril" helps in maximizing the absorption of the medication as the nasal mucosa provides a rich vascular network, allowing for quicker systemic absorption. Therefore, understanding that "EN" signifies this practice is essential for proper administration of nasal sprays, as it ensures that the full dosage is delivered effectively for patient benefit.