This medication is used for temporary relief of congestion in the nose caused by various conditions including the common cold, sinusitis, hay fever, and allergies. It works by narrowing the blood vessels in the nose area, reducing swelling and congestion.

How long does it take for Neo-Synephrine to work?

How long does your nasal spray last? The duration of relief for the active ingredient in Neo-Synephrine is four hours and is dictated by what the FDA has determined is safe and effective for products containing this active ingredient.

How does Neo-Synephrine IV work?

Phenylephrine is a man-made drug that stimulates receptors (alpha1 receptors) on blood vessels and cause blood vessels to constrict (vasoconstriction). It is a vasoconstrictor medication, structurally similar to epinephrine and ephedrine. Vasoconstriction increases blood pressure.