I have had a few patients with various acid related conditions and I have had mixed luck in treating them. However, I have seen now two gastritis patients who did respond to modest doses of CBD orally.
The newer generations of anti-acids (Nexium, Prilosec) share a significant risk of accelerating osteoporosis and many patients are becoming more hesitant using them daily. Short term or intermittent use is probably pretty safe.
Regardless, having some evidence that CBD can block acid secretion mediated by Acetylcholine and the vagal nerve, makes me want to treat Acid related conditions more aggressively with CBD.
Here are a couple of references
ACID AND CBD
Cannabinoids and the gastrointestinal tract — PERTWEE 48 (6): 859 — Gut