I Have A Colonoscopy Tomorrow Morning, They Gave Me Two

I have a colonoscopy tomorrow morning, they gave me two difernt kind of medicine that I have to use only one .
Citrona and the instructions say to take later 2 Dulcolax laxative which they did not give me.
also Golytely with instructions and bisacodyl without instruction as what and when to take it says as directed and no one directed and no instrucions mentioned it. However due to the bad taste
I took the Citrona and don't have Duralax