Pain Stop is no longer recommended after a tonsillectomy due to the high risk of bleeding. You will need to scroll down but it says
http://www.nps.org.au/medicines/pain...reliever-syrupshould not be given to children under 6 years of age after surgery to remove tonsils or adenoids to treat sleep apnoea.
Our ENT was very much against it. We used Panadol only.