Posted 7/9/2018 1:20 PM (GMT -6)
I read your post because of the title. In short, orally at 40mg QD (the highest I took at one time was 50mg orally), it will at least take 48hrs. I only speak from my experience. When things are really bad, I get an IM shot (sorry can't remember how strong). The shot works pretty much overnight for what am dealing with. I feel like I'm the queen of steroids thanks to the many Doctors' that have distributed it. I do hope you feel better!