http://www.drugs.com/mtm/oxymetazoline-nasal.html
Excerpt:
What is oxymetazoline nasal?
Oxymetazoline is a decongestant. It works by constricting (shrinking) blood vessels (veins and arteries) in your body. The nasal formulation acts directly on the blood vessels in your nasal tissues. Constriction of the blood vessels in your nose and sinuses leads to drainage of these areas and a decrease in congestion.
Oxymetazoline nasal is used to treat congestion associated with allergies, hay fever, sinus irritation, and the common cold.
