i tried to CTB with 30mg of xanax, morphine, oxycodone, tramadol, a lot of alcohol, and it didn't work, it was very fun tho, i enjoyed that day a lot
i think trying to CTB with medication like that are overated, because of fentanyl we all think anything will kill us but it isnt really the case
i suggest you don't, maybe try a lower dose and enjoy your trip
you'll find another better way