No ordinary filter should pass dust mite allergens (or pretty much any particle) just because it’s overloaded. Electrostatic precipitators will, but those are e

No ordinary filter should pass dust mite allergens (or pretty much any particle) just because it’s overloaded. Electrostatic precipitators will, but those are essentially worthless for residential applications. Maybe the Coway throws the filtered air in a more useful place for your use case? (Also, and this is utterly silly but I’ve gotten this wrong myself: the IKEA filters come with a plastic wrap on the filter. You need to open it up and remove the plastic. If you skip this step, you have a somewhat noisier than expected think that looks like a filter but provides no filtration whatsoever. Whoops.) P.S. Azelastine is not new at all. What is new is “Astepro”, which is the same thing, plus sucralose, and it’s OTC. The version without sucralose can be purchased pretty much anywhere in the US with a prescription, as a generic or a name brand product.