Splitting makes a huge dfference for me.
I was initially on 30mg and it just wasn't cutting it. I tried 10 + 10 +10 20 +10 and 30mg by itself.
My Doc upped the dose to 40mg since 2 days. I have been taking 20mg + 20mg 5:00AM and then at 2:00PM. This gets me till 11:00pm. I get bloody diaherra by the end of the night. I then take the hydrocortisone enema at night and get to sleep for a few hours.
For me taking 40mg one shot does not get me till 11:00pm... the meds wear off around 7:00pm. I start cramping and there are several bms with painful bloody diahrrea.
I am on my 8th day on Prednisone.