Adverse effects usually do not occur with use of this product. However, if the inside of the nose is very dry and irritated, itchiness may occur. If this effect persists or worsens, tell the doctor or pharmacist promptly. Developing very serious allergic reaction to this drug is rare. However, seek immediate medical attention if the patient notices any symptoms of a serious allergic reaction, including: Rash, Itching/swelling (especially of the face/tongue/throat), severe dizziness and trouble breathing.