Combinase AQ Nasal Spray is a combination medicine used in the treatment of allergy symptoms such as runny nose stuffy nose sneezing watery eyes and congestion or stuffiness Combinase AQ Nasal Spray should be used as you have been advised by your doctor Do not use it more often or for longer than recommended Normally you should blow your nose gently before using it keep one nostril closed while applying the medicine into the other and then sniff hard to make sure it reaches deep into the nose Then repeat for the other nostril It provides relief very quickly and can last for several hours If you use this medicine too often or for too long it may worsen your symptoms rather than improve them The most common side effects are taste change nosebleeds and headaches Most of these are temporary and usually resolve with time Contact your doctor straight away if you are at all concerned about any of these side effects