Methylpred DP and poison ivy

I have just finished my first day of taking Methylpred. So far
so good. I just want to know if it will cure a really bad case
of poison ivy/poison sumac and how long does it usually take.

ive been on this steroid several times for:
-asthma
-exczema
-poison ivy

my side effects are actually humorous. I have delayed reaction time,i get dopey and start drooling, and im very very giggly. Some of the not-so-funny side effects are jello-like feeling in your legs and arms, severe nausea at night after you take the dose for the day, lack of sleep, and my head feels 20 pounds heavier.

this steroid works very well, nothing else really does anything for me.

I was prescribed methylpred for a severe poison ivy/sumac rash, with intense itching. It didn't work that well on the rash, but two side affects are wonderful....I feel reenergized and can exist happily on less sleep. And the unexplained hand/arm numbness I've had for a few years, has disappeared.
It's interesting to read everyone's comments, with contrasting side effects, and various reasons for their prescription.