How long does the effect of the obesity injection last?

Recently, I have gained weight because I cannot control my food intake, possibly due to psychological issues. As I have become more interested in dieting, I have been hearing a lot about what you might call obesity injections. Seeing reviews saying they are effective, I am considering getting a prescription for these injections! However, now that I am actually about to start, I have some concerns. In particular, I am worried about how long the effects of the medication last.

I have heard that the duration of the effects of obesity injections varies from patient to patient depending on the administration cycle. I am concerned that I might be unable to control my appetite even while receiving the injections, or that if I stop, the effects might be very short-lived and lead to an immediate rebound effect. Therefore, I am curious about the actual duration of the weight loss and appetite suppression effects after a single injection. Also, if I stop the injections after reaching my target weight, is it easy to experience a rebound effect? ​​In this case, I would like to know how long the weight is maintained after stopping the injections, and what the recommended management period is typically for preventing the rebound. I know that I should combine this with lifestyle changes rather than relying solely on medication, but I would greatly appreciate any advice you can give me regarding the entire treatment process and the duration of its effects!