Reflux Mommas!

FTM115

So my 12 week old DS has reflux and has been on prevacid and Zantac along with thickened formula (all under GI care). I am wondering how do we know to decrease the dosage or cut out rice cereal? I personally never wanted to medicate or give cereal so early but he was miserable without it. I am not planning on doing anything without talking to his doctor but wanted to hear your input. Do you just make changes as trial and error? Also, he drinks about 24-27 oz in a day. Is that enough? I am sure rice cereal makes it pretty heavy. We add 2 tsp for 4 oz and he takes 3.5-4 oz every 3-4 hours. Thanks.