Yep, all that Sarah says.

It stops the acid moving up and down the oesophagus, so the burning sensation should end in a few days but the vomiting won't stop, that has more to do with the sphincter at the entrance to the stomach, being weak, so it doesn't shut properly.

Good Luck. Hope the Losec works for you. Ivy is on 20mg of Losec and along with a prescription formula, we are finally getting some relief...she still vomits though and some days a worse than others.