K.,
My son was on Zantac from about 5 weeks on. He was hospitalized for RSV, and was in respiratory distress. After a couple of days the doctor felt like his reflux was complicating his condition. I didn't understand and he explained that when my son would spit up he was inhaling a small part of the stomach contents complicating the situation.
There are also some non medical things you can do to manage this condition. Make sure you put a pillow under her crib mattress as she needs to be elevated while she sleeps. Always keep her head above her stomach after she eats. Also give her the medication.
I took my son off of the medication about 2 weeks after he was discharged from the hospital, he began to wheeze again and so we went back to the doctor who told me that this condition does not go away and is linked to childhood asthma. Also he said that prolonged exposure to the stomach acids in the esophogus can lead to esophogeal(spelling?) cancer.
I remember the difference in my son after taking the Zantac, he wasn't himself, but that was a good thing because it seemed as though his mood was better! I hope this helps and good luck!
~K. O