FWIW, my vet (surgeon, partner at the equine hospital) has been prescribing esomeprazole a lot recently. This is a new thing within the last six months for him. I’ve had my mare on it for three weeks as a trial, so I have not asked him yet about maintenance, though a friend of mine says her OTTB is on it for life now. I’ll be emailing him this week on our progress, so I’ll ask about incorporating it for maintenance. She’s getting 30 pills/day, which was $250 for the month from the vet clinic, but I’d definitely check CostCo, Amazon etc. if she is kept on it.