Fair question, and worth understanding before you start.
Appetite comes back
These medications work while they are in your system. When they are not, the fullness signals fade and hunger tends to return to where it was. That usually happens over a few weeks rather than overnight.
Weight often comes back too
This is the part people find discouraging, so let us be clear about it. It is expected, it is well documented, and it is not a personal failure. Weight management behaves like a long-term condition. Stopping treatment for a long-term condition usually means the condition returns.
Some things you built do stick
Habits, exercise, and what you learned about portions and nutrition do not disappear. People who keep the habits generally do better than people who do not.
Talk to your provider before you stop
Especially if you are on a higher dose, or if you also take diabetes or blood pressure medicine. Those doses may have been adjusted around your weight and may need changing again.
If the reason you want to stop is side effects or cost, say that. There may be options you do not know about — a different dose, a different medicine, or a pause.