Has anyone used this for stomach issues or for any other reason? What was it like for you?

I was prescribed it for severe stomach pain and I started it yesterday and its gotten rid of the pain but it makes me feel weird both physically and mentally and I also have no appetite on it and I really have to force myself to eat. I have to take it 4 times a day and its like I'm not in extreme pain, cool but I'm still not feeling good.... maybe I just have to give it a few days and the side effects will go away. I don't know.

But does anyone know anything about this med?