I was prescribed budesonide in liquid form. The instructions were that I mix the liquid with distilled water and salt and then rinse out my sinuses with the mixture using a neti pot twice a day. I did this for several months, and I noticed that my sense of smell markedly improved over that time. I tried several treatments (budesonide, PRP, glutathione) to restore my sense of smell, and almost all of them helped. So, it's difficult to say definitively how much one helped compared to the others. But when I stopped using the budesonide rinse for a while, my sense of smell worsened, so I know it was having an effect.

I did nebulized budesonide 2x/d for 3 months in a Long Covid clinic a few years back. It took time, but it significantly and permanently helped my short term memory loss, anxiety, and indecisiveness. I didn't have any side effects from it. The only downside is that it's pretty time consuming, but it was well worth it.

For severe symptoms, episodically, 1 week taper