Puppies so good to hear that your doctor listened to your concerns and acted on them, that is really refreshing as I initially thought he may not have any reflux idea! I hope the switch back starts to make him feel a little better.

In terms of having reflux at his age, it is a little rarer but I have a 6 year old with it and this from someone who was repeatedly told that they outgrow it by 12 months. I am a member of a US reflux support site and it was only there that I found that there are tons of kids who don't outgrow it on cue and that it isn't abnormal.

All I can say is things do get better, although you may still need medication they do get better as they get older.

By fix it, I would be concerned he would be recommending surgery, there is a surgery for reflux, the fundoplication, but I strongly suggest that you research it fully before ever going ahead. For us, we have refused because most kids who have it, still need to be on medication, which would be the only reason for us to have it, so what is the point. A fundo should only be given if there are life threatening complications and it is your last shot.

With the blood tests, that too is pretty standard for longer refluxers, first off any meds can affect absorption so you may find he has low iron or vitamins, like vit D, the immune is also pretty standard by this age. Don't be alarmed if it is low, most immune conditions are grown out of by 5 or 6.

Also if he is to be on losec for long term, look at getting him to see a naturopath, they can give better quality children specific vitamins that can help, like I said losec stops absorption, we only just started seeing a naturopath for Parker this year (when he was 5) but he has been really well since (other winters gets sick a lot).

Good luck!