OKAY. Thank You. I Am Scheduled For A Cat Scan

OKAY. Thank you. I am scheduled for a Cat Scan of my abdomen and pelvis for Hematuria today with IV of Iodine (I think that's what they told me). They prescribed 32 mg of Medrol to be taken 12 hours before (Cat Scan is 8:20pm EDT) and 2 hours before at 6:20am. When I took it last night at 8:20pm very soon after taking it my blood vessels in my body got very large (expanded quite a bit). I only weight about 90 lbs. I am 64 yrs old. (I have been losing weight lately, unexplainable, but I was under a lot of stress for a long time from my job and I don't sleep well. I am wondering if I should take the next does of 32 mg at 6:20am this morning. That is my question.