I am on keytruda and use medical cannabis and my oncologist is fine with it but said stick to the edibles (gummies) no smoking or vaping at all! Also make sure the gummies don’t have any grapefruit oil. I have had 3 treatments so far and after just 1 treatment my signatera test went from 50 to 2.4! That alone is great so it doesn’t seem my cannabis use has affected anything.