A double blind, randomised placebo controlled trial of topical 2% viscous lignocaine in improving oral intake in children with painful infectious mouth conditions.

This study looks at children with viral infections which create painful ulcers in the mouth. These ulcers can cause children to become dehydrated because the ulcers make drinking painful. This study aims to find out whether 2%viscous lignocaine, a numbing drug, helps children drink. 50 children will be given the drug and 50 children will be given a mixture which looks and tastes like the drug, but has no active medicine in it. The study will record how much fluid the children drink, and also look at whether or not any complications develop. This way, we hope to work out if 2% viscous lignocaine is a helpful medication for children with painful ulcers in the mouth.