Yeah I know someone who is having real trouble stopping, he can cold-turkey for a few days but always starts up again. I think he has poor impulse control, which maybe GLP-1s could help, as some studies seem to indicate they help with cravings/impulsive behavior generally. I don't know if any MD would prescribe it for that, he's not obese so could not get it on that basis.
yes there are no side effects. i have cold turkeyed twice (once when actually in turkey). and nothing bad happened. even AI was telling nothing bad wud happen. but im usually a light user. say 4 joints a day with 4 grains of # in each.