verapamil and TMZ

Stephen,
. IF I was to take verapamil with temodal do I need to start the verapamil a few days before starting temodal also if that is correct and once that is established can I take both drugs at the same time? Would it effect the absorption of temodal? I wanted to take them so they are both in the system at peak plasma times. From what I've read the  time to peak plasma concentration for temodal is 1 hour, half life 1.8 and Verapamil immediate release is 1 - 2 hours for  and half life is 2.8 to 7.4 hours Verapamil extended release with food is 12hours to peak plasma concentration and without food 7 hours. as per link below.

I have both immediate release and slow release but not sure how Alan will respond so not sure if we'll end up taking the SR or the immediate release. Do you know what the best time frame to maximise  Verapamil's multidrug resistance effect along with Temodal for both slow release and immediate release would be.
http://www.medsafe.govt.nz/profs/datasheet/v/VerpamilSRtab.pdf