I agree Baby swings are a god send! The losec won't stop him being sick but will reduce the acid so therefore eventually has a side effect of reducing the vomiting. If the losec doesn't work you can also try Ranitidine which worked better for us.
Losec will take up to 3 weeks to work properly so hang in there and you can give him Gaviscon as well but needs to be at least 2 hours apart from the Losec.
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9 year old son - No reflux! Best baby ever!
4 1/2 year old son - Reflux, out grew at 12 months! Yay!
2 Year oldson - Reflux ongoing screams all night