As for the CBD oil only about 3 weeks. But it has helped me sleep better. I also take daily milk thistle and dandilioin root, as well as probiotic and active yogurt culture. I was misdiagnosed almost seven years ago, 4 TIMES! I was told that I had trigeminal neuralagia and given gamma kife surgery which was the worst thing they could have done! Finally at Duke Cancer Centre I was told that it was cancer caused by the human papillomarvirus and had the scans been read corretly previously at two differnent hospitals I would not been facing a death sentence. One doctor gave me less than 3 months to live even with treatment. That cancer 7 years later, with my throat severely scarred from radiation as well as chemo is in remission. However a Squamish cell carcinoma was detected on my right tremple and because of once again misdiagnosed removed scraping it developed into a serious threat and was removed by surgery. However a second tumor appeared over my left eye and removal of my eye was considered. Thankfully at my insistance and the agreement with a specialist at Wake Forest Libtayo was initiated with with excellent results. A sample from the tumor was examined and found to have 2 "cellular anarchies" were found but also I was found to be in the upper 90 percentile of pepople with good tolerance and response ot immunotherapy.