Your son has a virus infection of his mouth called herpes stomatitis. It is infectious and other children can be infected by the same virus. The antibiotic will not help for a viral illness so stop this and you should not give your child Stopayne which contains codeine. Daktarin gel is for thrush and will not help either. Apply Teejel to the ulcers as this relieves the pain.Also only use Panado for pain. If your son won't eat or drink you will need to watch that he does not become dehydrated. He should be seen again by the paediatrician if he continues to refuse to eat or drink.
Zinplex is a good immune booster at this age.
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