Does sucralfate only works on ulcer site or the entire stomach lining which is inflamed/damaged during gastritis? will it also prevent new ulcer?

Ulcer site: Sucralfate is used to treat and prevent duodenal ulcers. Sucralfate works by forming a coating over the ulcer. This protects the ulcer from the acid of the stomach, allowing it to heal.

Dr Hegab and another doctor agreed

Multiple uses of Suc: If you have duodenal ulcers, you benefit from Sucralfate. Uses of this medication include treating duodenal ulcers and preventing them from coming back. This prescription medication works by forming a protective layer over the ulcer. Sucralfate mostly works at the site of the ulcer.Very little get absorbed. Also used for Gastric ulcer, GERD, Mouth sores from Chemo, And Stress ulcers in ICU, Oflab

Agree w 2 Doc: In addtion,Usually most Primary cares as well as Gastro that I have seen and work with do not use this alone and use with a proton pump inhibitor.Of note the liquid is expensive but the tablets not so.Drop the tablet in a small amount like an ounce or two of water,it dissolves in about 3 seconds and then drink that.