Yes, but the problem is that these are not meant to be forever drugs. You're supposed to take them in conjunction with changing diet and exercise habits so that you can go off the drug and maintain a healthy weight on your own. Often people get off of these drugs without having done the work, and they end up right back where they started.

I think is the other way around. They extend the "I'm fullfil" hormone like from minutes to hours, so people don't find themselves snacking an hour after eating

The gastric bypass helped lose weight fast, she kept it off for a while. I still don't think she eats that much. Alcoholism is a beast of it's own, I think she got disulfiram out of rehab to help.