Methylpred DP and reduce swelling

I was prescibed Methylpred 4MG Pak to help reduce swelling in my sinuses. It's worked pretty well. The only side effect I have is when I have to take 2 of the pills at one time I have a problem concentrating and am a little bit light headed. I don't have that problem when I only take one pill. Also, I drink lots of water when I take it because it leaves an aftertaste in my mouth.

I just started taking methylpred 4mg pak to reduce swelling in my surgical site. This is the first day and I feel awful. I hurt all over and have chest pain. I can hardly sit because I feel better when I am moving, but not much. I started this morning and felt the effects by about 1pm today. I don't know if I can do the full 6 day regimine. I felt so much better right after the surgery.