Scheduled c section question

LC
I have a scheduled c section 08/18 but it's in the evening I have to be at the hospital by 4:30 and the c section is at 6:30..The said I can eat a light breakfast..but 8 hrs before...even if I eat light do you think I will have a reaction to the medication from eating anyways..or do I just fast the whole day..or what is even consider a light breakfast