About oxymetazolinealpha adrenergic agonist, imidazoline derivative, vasoconstrictor (nasal decongestant).mechanism of action of oxymetazolineit is a nasal decongestant with selective alpha-2 agonistic action. it produces local vasoconstriction, reduces blood flow, and causes shrinkage of mucosa which provides relief of nasal congestionside effects of oxymetazoline1. dryness of nose and throat 2. irritation 3. burning sensation 4. stinging 5. sneezing 6. rebound congestion 7. hypertension