I have two carcinoid tumors on my liver and they have been there for many years. I have been on octreotide monthly for over nine years and have had no symptoms. I have just been on octreotide and the only other thing is I watch my diet, moderate eating with limited calories, veggies, a bit of protein and pasta. with no sugar and I don't eat out. I am 78 years old and have had carcinoid tumors for 22 years.
My non-professional opinion is your doctor is overdoing it. Why add Lutethera since you are on octreotide and have no symptoms? I have never taken any pill of any kind for it. If you don't have to deal with carcinoid syndrome which is a whole different deal, a lot of what an individual physician can recommend is overkill. Carcinoids are still generally slow growing. At our age it is more likely that something else will probably kill us (probably from a crash in a car ride driving to get treatment). There are only so many physicians out there that know a lot about carcinoid tumors but they will treat you anyway regardless. Again, being a non-professional, I think just being on the octreotide is good enough if you are not experiencing symptoms. I have been getting MRIs and some CATs to monitor mine all these years and things have been fine. Get a second opinion.