I'm happy that you have asked me to assist you with your child and hope that you can benefit from my many years of helping parents like you.
I suggest the logical plan you have already touched upon and that is a gradual change. If you will just mix a little more pepticate with his neocate each day, perhaps a half ounce more each day, it will allow him to get used to the taste and enable his system to adapt slowly over a week or so to the new formula.
I use this approach when changing formulas or even from breast milk to formula to ease the baby into it.
do we alternate the feeds or add the neocate and pepticate together. also what side effects may we expect.
They are both excellent hypoallergenic formulas and I understand Pepticate is less expensive in some areas and certainly doesn't smell like the Neocate, or the equivalents used here in the US
You may mix them together so his system slowly adapts to the change. As to side effects, one can see constipation but usually some loose stools and gas, but don't be discouraged by that and just press on.
Every change in diet at this age will cause some temporary upset but that will subside over a week or so.
if he becomes constipated should we use lactose
You may or just give him a little apple juice.
also the necate is very high in calories, should he take more of the pepticate as he changes over
Not really as long as he is gaining weight ok. The higher calorie formulas tend to cause more gas and diarrhea so he is actually less likely to do so on Pepticate.
You are quite welcome and good luck with your baby.
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