Welcome to HealingWell and the GERD/Heartburn forum.
All of the research I have found says that it is VERY important to WEAN off PPIs. This is because stopping cold turkey causes a rebound effect where the stomach starts producing even more acid than it originally would have. After time this rebound period goes away but it is agony if you go cold turkey off the med.
Joy suggested a good plan to follow.
Again, a warm welcome,