Kanna and diazepam

I use 5mg diazepam once a day, i usally take it 1-2 hours after my morning supplement (d3/k2, boswellia, holy basil, ginger, c vitamin (not ascorbin), Omega3, multivit with minerals), bromelain and olive leaf extract. Can i add kanna to my morning supplement? And will kanna interact when diazepam that will be taken 1-2 hours after? I also take painkillers due to tumors and cronic neckpain, codeine or buprenorphine, taken 2-3 hours after diazepam once a day. Will that interfere? As i understand kanna will give som energy and can impact sleep negativ if taken late in the day. I have problem with sleep.. Im new to kanna so dont know to much just only what ive googled so far, i like to try kanna for stimulating mood and calmness etc (not going to take it daily of course). Will try out the brand i posted in my first post. AND, dosage? My capsules are 25mg, is that enogh for mood stimulating? Thanks!