I have never heard of anyone having a colonoscopy without sedation. In my home state the colonoscopy sedation is always done by the GI, not an anesthesiologist, or a separate doctor. It is true that sigmoidoscopies are routinely done without sedation but if it's too uncomfortable the doctor will prescribe a sedative.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free