zegerid and zantac

DS is 5.5 months old and 15.5 lb. He is only Zegerid 40mg – dose as per the marci kids site – the max dose he can be.

My question is that he still is coughing a lot. It doesn’t seem to hurt him so much, but it does wake him up often – he’s up every 2 hrs in the night sometimes and just can’t settle.

Is that normal for Zegerid or should I see some difference from it?

Also the Dr said not to give Zegerid and Zantac to the baby cause it increased the side effects. Is that right? If not, how much can I give him. I’d love to be able to give him some at night to stop him waking so often.

Thanks