Ativan and brain mri

I was prescribed Ativan 0.5 mg. x2 in order to relax me before a brain MRI. I never do meds, but I did find that I am slightly claustrophobic and that was the only way I was going to be able to have the procedure done. Ativan did the trick, although I did take 3 pills in the span of a couple of hours. It didn't take effect immediately, but once it did I had no nervous edge for a couple of days! But, my husband threw away the rest of the bottle (10 total), so perhaps it affected me more than I realize!