I get horrible, painful, burning/cold acid reflux sometimes depending on what I eat and how my body is feeling, I’ve tried Tums and Rolaids but Gaviscon surpassed these both GREATLY. This works almost instantly, they foam as you suck/chew them so you can feel the foamy coating it provides to your esophagus and stomach. Very fast acting, only need 1–2 whereas sometimes I would take 4 tums and have no relief. 10/10 would recommend.