Getting to know

Allergy symptoms are caused by an allergic inflammatory process in the affected organ. Symptom relieving drugs can reduce allergy symptoms, or even make them disappear, in a matter of hours or days. However, treatment of the underlying inflammation takes a longer time. 

Therefore, in the absence of anti-inflammatory treatment or if the drug treatment is stopped too early, the symptoms will soon come back. With inhaled allergens in particular, it is essential that you continue your treatment for as long as the allergen is in the air. 

The pollens of some plants have a short season when their airborne levels are high but with other plant pollens or house dust mites, treatment must be continued for long periods as allergens remain at high levels in the air. 
Regular, daily therapy for a long period of time will keep your symptoms under better control than intermittent administration of drugs only when you feel your symptoms are bad.