I have a cautionary tale regarding Omeprazole. Both I and my DH have hiatus hernias and were prescribed it. DH took a high-ish dose which helped his acid considerably. However, after a while, he noticed he was getting nasty stomach upsets which needed antibiotics. He had four in 6 months. He suspected the omeprazole was implicated, but the GP didn't buy it and wasn't interested in discussing it. He was referred for tests to rule out anything nasty - all clear. However he has access to scientific papers (he was a research scientist till he retired) and using those and his own powers of deduction, went to discuss his theory with the pharmacist at Boots who was interested in what was happening to DH. The bottom line is that the stomach's acid has a good function - it protects us from getting infections - so with some people, reducing the stomach acid leaves them vulnerable to getting them. But if he takes nothing, he gets excess acid and burning! So at the moment it's a question of finding the balance: the dose that reduces the acid production but not to the extent that it leaves him prey to any stomach infection going. He thinks he has it about right now, which is a relief, but worth bearing in mind if you find yourself with repeated stomach bugs.
I have to say that Omeprazole doesn't have that effect on me. I was able to reduce my dose considerably as I lost weight, but now, because I'm on an antidepressant which has made my weight increase again, my HH symptoms have worsened and I have to take it regularly now.