look at the list of signs to see if it’s intolerance-these seem to be poop/gas issues, mostly. so, if baby is having painful poops, painful gas, stools are not right consistancy- then it could be intolerance issues, too, and so that’s when you’d try nutrimigen/alimentum (need to give each change a good TWO WEEKS!) and THEN you’d try neocate/elecare…
if there is no poop/gas issues, then you’d leave formula alone and concentrate on meds. If there is no pain w/ spitting up, then you would not even need meds-meds address the PAIN of reflux, they do not stop it.