My Baby spits up A LOT and my Dr. says Reflux?

My family dr. says she thinks that my little guy has reflux, he's 6 months old and stills spits up quite a bit. We switched him to baby food jars due to the fact he eats like there is no tomorrow! She suggested that he was eating too much formula and therefore spitting the amount he doesn't need up (or something like that). Is there a test to do for reflux for babies and how safe is it to prescribe Zantac for a baby? She said she will see us Oct. 20th (which is suppose to be his 6 mo. well child check, but he is getting in late, 7months exactly) is there something I can do besides giving him Zantac?

[Ratnakar ., MD]

Hi,
Reflux can occur as a physiological phenomenon in babies during the first few months of life.
Zantac is safe and you can give it.
Give small feeds.  Give semisolid/thickened feeds.
Keep your baby in propped up position after feeding him.