S.S.
I would not go in at 4:30....let him work it out and he will. Babies can be very ingenious at entertaining themselves and self regulating when left to do so on their own. Let him be self reliant at that time of night so that he will have that pattern the rest of his life! It works. I did it with both my girls and they haev been great sleepers their whole lives. Also, reflux meds interfere with brain development. The drug companies list in their prescribing information not to leave children under a yr on them for more then 11 weeks, I think it is. They have tons of aluminum in them!