How many hours ago hun?? If it was more than 2hours I would be taking 2 more but if you aren't sure or comfortable taking it, call Nurse on Call or a local chemist. I took some Telfast the other day that did bugger all then rang the chemist to see if I could take some more of a different one and it was fine. Do you have some Nurofen? You could definitely take some of that as well. xoxox Hope you are feeling better soon.