Hi Calluna, I'm a pharmacist. If you have vomited up your tablets within minutes of swallowing them, I would suggest that there would be minimal absorption of the drugs into your bloodstream and you would be safe to have another dose straight away. So definitely take your paracetamol and metoclopramide now, and hopefully you'll get some rest and relief. (BTW you are perfectly correct to play it safe - if you had vomited any more than 15min after taking your tablets I'd say you'd have to leave it for a couple of hours, just to be sure)