I have a severe dust mite and pollen allergy. The problem with medication, if your body slowly gets used to it and stops working.
Twice daily I use a saline nose spray to clear out anything. When symptoms get really bad, I use prescription medication (tablets + nose spray). During pollen season I use an asthma preventer and ventolin - seasonal asthma.
I find the best way to manage is through lifestyle. No carpets or curtains in my home, tiles, floorboards and binds only. Deep vacuum and mop weekly.
Limited material furniture, think leather couch.
Dust mite covers on mattress, doona, and pillows. Boil washed every week.
Where possible, straight in the shower when you get home to wash off pollen and dust. Never go to bed without a shower and washing of hair.
I have considered being desensitised, but the process for me would take 3 years of injections - very expensive and I don't have the time to commit to it.