Measured Dose - Sinusitis Spray - Adult Formula Relieve a runny and blocked nose quickly and gently Otrivine helps to open up the nasal passages by reducing the excessive nasal secretions and returning the swollen blood vessels to their normal size. The effects start within minutes and last for up to ten hours. Drug Interaction Precautions: Some patients who have sensitive nasal passages may feel some local discomfort when applying the nasal spray. If these side effects are severe, or you experience other side effects, consult your doctor or pharmacist. Other side effects such as palpitations, nausea and headache are very rare. Otrivine Metered Dose Sinusitis Spray is for local application in the symptomatic relief of nasal congestion, perennial and allergic rhinitis (including hay fever) and sinusitis. Decongestants should not be used for more than seven consecutive days. If symptoms persist consult your doctor. Warning: Do not exceed the recommended dosage Keep this medicine out of reach of children For reasons of hygiene, do not use the product more than 28 days after first opening it. If you are pregnant or taking other medicines or are under a doctor's care, consult him or her before using Otrivine.