The usual dose of Vermox for a child of 2 years is 5ml twice daily. Your son could well be having a reaction to the Vermox which may very rarely cause a tummy ache and vomiting. The Vermox should be stopped.Keep up the liquid diet for today as he will benefit from this. If he needs de-worming in the future he should not use Vermox again.There are other de-worming medicines available.
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