I tried allergy shots for over a year. It was a real pain and a whole lot to do. I experienced no benefit but did have a couple of minor reactions at the office. At this point in life, I get by with Zyrtec. During the worst parts of the pollen season, I take two pills instead of one. My doctor said that was fine and I haven’t noticed any side effects from doing so. I also have budesonide nasal spray on hand for when sinus inflammation ramps up. Everyone’s body is different but I’ve found that inflammation can take on a life of its own if let it run rampant. It’s best to nip it in the bud when it starts.
BTW, budesonide nasal spray is considerably more effective and has less side effects than fluticasone (Flonase) in my experience. Just a guess but it might be because most of the fluticasone formulations out there use a problematic preservative: benzalkonium chloride. The generic budesonide I get does not use that ingredient.