@woollygal
This isn’t really the sort of thing that forum members are able to answer.
Our forum rules prohibit giving medical advice, including specific advice on medication dosage.
so I have two suggestions for you.
Firstly, get the Patient Information sheet out of the packaging that came with your medication and see what it says about vomiting.
Then, if that doesn’t give you sufficient guidance, the ring the NHS helpline on 111 and ask your question there.
Sorry we cannot help you further here, and I hope you feel better soon.