I did my first one last year fully awake lol, they had to be convinced to even allow it. Most GIs do not anymore, not because its hard to do (in Europe and many other parts of world its standard practice due to medical costs) but nowadays because its becoming harder for US doctors to make money many have a policy of no colonoscopies without sedation because they get paid boatloads more money if its used. Same as many, if you have kids know that for orthodontists its way more lucrative to do wisdom teeth pulls with sedation than without. In our case it was 1200$ less without it