I was diagnosed with stage IV metastatic lung cancer in August, 2018. I had radiation treatment on my brain tumors that resulted in 1 tumor now barely detectable and the other 2 reduced by 75% – I was also being treated with 2 chemos (alimta and cisplatin) as well as keytruda. After 4 treatments of this combo, I am now on ongoing maintenance and receiving only alimta and keytruda. I have no side affects with the exception of sensitive/weepy eyes and a drippy nose in week 3 of every treatment. My MD says she has not heard of this before but I find it odd that it is always in week 3, the same week I will receive the next treatment. I have recently read about CBD oil and its possible anti-tumor effectiveness so started taking it just a week ago. I had no idea that it may reduce the effectiveness of the keytruda so plan to speak to my chemo pharmacist this Friday when I go in for my next treatment. There is so much conflicting information on the web, we must all be careful. My oncologist says of there is not a study on it, she will not recommend it. No alternative treatment advice from her, but so far I am responding well to treatment so we are doing something right. I hope to win this battle, that's for sure. Dies, exercise and meditation are so very good for us too!