Zantac and reflux

mY 11 year old son has a history of reflux, which he had taken Prevacid for in the past. He broke his arm and is taking NSAIDS, flaring up the reflux. Company's new insurance plan requires we have documented 2 week trial of zantac prior to approving Prevacid for use. He has been on Zantac now for four days and has had increasingly frequent watery diarrhea, stomach discomfort, nausea, difficulty sleeping, and loss of appetite. This is an unacceptable side effect profile for a medication for a child. Per the insurance company, he has to suffer with this for two weeks in order to get a medicine that we know works approved for payment. Insane. I will be taking him off Zantac as he is worse now than when he started taking it.