Splitting the pill is perfectly fine to do, and I would go with the 30 mg since overdosing is really not a concern. And I would probably do as you are doing and give 15 mg a.m. and 15 mg p.m, but you could also try 3 doses of roughly 10 mg (divide as best you can). I found that my son needed a little more than what marci-kids recommended; he was on 30 mg, divided into 2 doses of 15 mg because when we tried to divide it into 3 doses of roughly 10 mg, he got very little relief — he needed at 15 mg at one time to knock out the pain. Even so, every day by the afternoon he was in pain again. We gave Zantac then but it did very little — I would have gladly given him 45 mg of Prevacid/day if I could have — that’s how little I would worry about overdosing.
Oh, and Prevacid is not like Zantac as far as being weight sensitive. In fact, as babies grow and their metabolisms slow down a bit, they need less medicine PER KG of weight. For us, this was proven by the fact that Nathan’s a.m. dose of 15 mg did not last til the afternoon when he was younger, but as he grew he didn’t speed through the medicine as fast, and the same a.m. dose starting lasting longer, all the way til the p.m. dose, finally giving him all-day relief (this was when he was about 7-8 months old). Like Amy said, you can play around with the dosing calculator on marci-kids and see what I mean.
Hope this helps! Good luck!
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