But I'm also managing my diet to avoid the non-acute allergens I'd been ignoring since junior high. Mainly potatoes and tomatoes. They're pervasive and avoiding them without diet drama in ordinary communal eating is impractical. Pizza is one of the four food groups of American social dining. Fries are another. Xizal handles my occasional consumption.
For many people, significant dietary modification is impractical because it dictates menu and grocery autonomy. "Just change your diet" is an it works on my machine. And the social implications of dietary restrictions are there whether it's veganism or a shellfish allergy.
Anyway, my non-expert belief diet modification has ended several continuous non-acute allergic reactions. My less mild allergies seem to mask milder food allergies. After avoiding tomatoes for a while, the effects (and non-effects) of other foods were above a new lower noise floor.
Not that I think it's all food and pills. Environment also plays a role. There's mold in the south. Pollen in the spring. Dander on the pets. A sigmoid with multiple inputs might be a good model for the perniciousness of allergies. The cost of changing the inputs may not be worth the benefits. Even if "a vegan lifestyle in the New Mexico high desert" might have a high probability of success, it's reasonable and rational and emotionally sound to decide the tradeoffs would be too much.
It might be worth taking generic Zyrtec daily if you find that reduces the problem. Allergy shots have also been super helpful in reducing my immune response to plants, cats & dust.
Try it first thing in morning and just before bed for a week or two and see what happens.
It works off the theory that xylitol is a 5 carbon sweetener that bacterial will consume, but starve on. No antihistamines or other substances to make you feel woozy, tired, or amped up.