Prednisone
"Suffered from chronic sinusitis for over a year. Couldn't breath through my nose and daily headaches, brain fog and congestion plagued my life. Numerous antibiotics didn't work. 

Got given 5 days of this tablet (30mg) and within hours it works. The swelling reduced, I could breath and my sinuses cleared in 3 days!

The downside is it sent my anxiety through the roof and I didn't sleep for a week but after a year of chronic sinus problems it was nothing!!

Try it :)"