This can lead to a need for bigger and bigger doses. Preventer treatments Preventer treatments are used to prevent nose and eye symptoms developing in the first place. They do this by suppressing the allergic reaction in the nose and eyes. They are very effective at controlling hay fever and perennial rhinitis symptoms if used regularly each day. If you have hay fever, you should start using them a couple of weeks before the hay fever season starts.
Eye drops, nasal sprays and nose drops are available.
Ask your doctor, nurse or pharmacist as there are many others available. If you use nasal drops, you need to bend right over so that your head is upside down. If in doubt, read the patient information leaflet that comes with the medicine. Ask your doctor, nurse or pharmacist to check that you are taking your medicine correctly. Some preventer treatments contain a small amount of corticosteroid.