What is the appropriate recommended frequency for obesity injections?

Recently, I haven't been losing weight as easily as before, and I feel I've reached the limits of managing it solely through diet and exercise, so I'm looking into weight loss injections. I often hear people around me talk about consulting with doctors for weight loss, and I'm wondering how long I would need to take the treatments consistently if I were to actually start.

In particular, regarding obesity injections, it doesn't seem like a treatment that ends after just one or two sessions. I would like to know if the recommended number of sessions varies significantly depending on individual weight and body fat percentage. I have heard that they start with a low dose and adjust it while monitoring progress, but I am also curious about at what point weight changes typically begin to appear.

I am also curious whether I should stop the weight loss injections immediately upon reaching my target weight, or if I should maintain it for a certain period and adjust gradually. I would like to consult on how the recommended frequency is determined for long-term use and how to manage the situation if the effects plateau. I would like to make a decision after hearing an explanation regarding potential side effects and precautions.