Grab a PPI like omeprazole and you should be fine. Same issue hit me once, not from Reta, and it sorted it right out.
Been on Reta eight months. Hit what felt like my top at 4 mg split twice weekly about two months back. Tried moving straight to 3 mg per shot and got heartburn that felt like gastritis. Even 2.5 mg and sometimes 2 mg still triggered it now and then. Dropped to 1.5 mg shots (3 mg total) a couple weeks ago and it got much better, but going back up to 2 mg shots brought the heartburn back a little. Anyone else run into this? Can't go any higher so I'm hardly feeling effects and the scale has started moving up without the appetite control.