I'm allergic to dust and dust mites so I can understand the frustration for both of you. I don't take any medication for the problem, I simply adapted my lifestyle. My air filter gets changed every two weeks, I put  cushions and pillows in larges trash bags and vaccum them flat to remove small particles (think like space bags on TV) I don't have a lot of hard to clean surfaces like little knick-knacks, I shampoo my carpets once a month, anything to control the environment of my home and give me a place to truly be comfortable.