Usually vomiting is not due to disease of the stomach but due to the generalised effect of another illness...

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New formulation for omeprazole

The widely accepted drug for reflux called Losec is no longer fully funded by PHARMAC. The only preperation available is called Dr Reddy's omeprazole. This is the same compound (omeprazole) but is significantly cheaper and hence there is a sole funding arrangement is for this drug. The evidence to date would suggest that this is comparable to Losec but time will tell whether this proves to be as effective in clinical practice. Some people have chosen to pay the extra for the established brand

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