2.1. Patients
A quasi-experimental study was designed with the approval of the joint Ethical Committee of <blinded for review> and the Medical Advisory Committee of <blinded for review>.
We administered PPPM questionnaires to parents of patients that investigated pain ratings, behaviour and medication use. PPPM was utilised as it is a validated tool for assessment of pain by parents following their child’s surgery(4). The data was collected between February 2017-April 2020. Children 4—12 years old(n=180), admitted for tonsillectomy or adenotonsillectomy were invited to participate in the study. Children with diabetes, gastrooesophageal problems, involvement in another study, sensitivity to any trial drug, morbid obesity, cognitive impairment or other severe disease were excluded. Informed consent was obtained in writing from the parents and verbally from the children where possible.