Is switching baby formula brands dangerous my baby is spitting up a lot so dr said to switch to enfamil ar from similac advance baby is 1 month old?

Not specificly: The switch is not much of a change.You go from one companies bovine formula to another companies bovine formula thickened with rice solids. Thickening can sometimes reduce spit up.You could simply add a half teaspoon of rice cereal/btl & do the same with the similac. Similac has a "sensitive" that changes to a soy protein source & removes the lactose. Either product are good nutrition & may help.

Small differences: But the greatest difference is that the ar formula has rice cereal in the formula. It is made in such a way that the formula does not thicken until it is in the infants stomach, thus making regurgitation less likely.