Can modern medications help with weight loss and how should they be taken?

I’ve been hearing a lot lately about how certain medications can help with weight loss, and it’s honestly been on my mind for a while. A friend of mine has been using some medication recently, and she says it’s been working wonders. I thought I’d try something similar, but I don’t really know where to start or how these medications work. I’ve heard about stuff like semaglutide, but the whole process of using them seems confusing. How exactly are they supposed to be taken? And do they really make a difference when it comes to losing weight?