|It has to be the elimination diet. Prevacid reduces the acidity of the vomit - it does not stop the vomit. By reducing the acidity, it helps protect the esophagus and manage the pain WHEN the baby vomits.
I am not a doctor but based on my experience, I really think your daughter has food allergies. We thought my daughter had reflux for 7 months before having her allergy tested and finding out she is allergic to milk (I already knew) and corn (I didn't know), which were both in her formula - not to mention peanuts, shellfish, beef, etc.
We switched her from Alimentum formula to Neocate formula - which is completely broken down so as not to cause allergic reactions. She completely STOPPED spitting up, literally, after one feeding. She doesn't even have to wear a bib now, and this is a child that would soak through at least three or four bibs and one or two complete outfits every single day.
The night waking also stopped. (Until the ear infections and teething cropped up!!) Like your baby, before switching to Neocate she was waking without explanantion all night long. She was very fussy and fidgety in her sleep. She also had a chronic cough and congestion, and toward the end developed a bumpy rash right under one eye.
I would stay on the elimination diet for a few weeks to make sure all the allergens are out of your system. Then you can add one food back in - one at a time - VERY gradually, to see how she does. If she starts spitting up/waking up again, you'll know what she's allergic to. So, I would say add them back in one by one, just one food every two weeks or something. You can get more information about at www.refluxrebels.com or talk to your doctor, who should be able to help you come up with a plan.
To find out more about how Prevacid and other PPIs work, visit www.marci-kids.com. This website is so thorough and easy to understand - it is an AMAZING resource!
I'm sorry your baby probably has food allergies, but at least you know what's been causing her pain. I take comfort in the relief of knowing how to help my baby feel better now. Good luck!