Answer
Xylometazoline hydrochloride in Otrivine Adult Nasal Drops constricts nasal blood vessels through alpha-adrenergic activity, reducing congestion in the lining of the nose and neighbouring pharynx so people with colds can breathe more easily through the nose.
Sources for this answer
- Otrivine Adult Nasal DropsHaleon UK Trading Limited · emc · SmPC §5.1 Pharmacodynamic properties · Version 11Document updated
Sources checked