Just mentioned this in another comment, but if you have a wide range of environmental allergies then an anti-IgE treatment like Xolair would knock them all out

Just mentioned this in another comment, but if you have a wide range of environmental allergies then an anti-IgE treatment like Xolair would knock them all out at once, although you have to take it continuously to keep receiving it's benefit. OTOH if your rhinitis is related to nasal polyps then there's other treatments you can look into to (permanently?) shrink them.