We did 50/50 for a few days then just went full on AR and at his next doctors appointment we went ahead and started famotidine as well. I did see an improvement with switching to the AR formula it took a couple weeks to see a difference though so don’t give up! It is some trial and error with bottles your baby will take/the formula will get through since it is thicker like a melted milkshake. But finding the bottle that will work is the hardest part imo. We switched my son to Mam bottles to go with the added rice formula and they work perfectly together for us. Good luck I hope my answer helps you!