The average weight for a boy of 19 months is close to 12kg. Your son's weight falls on the 10th percentile line of the children's growth chart. This means that his weight is in the lowest 10% group for boys of this age. His tonsil infections appear to be chronic if he has been put onto Penicillin and must be a factor accounting for his poor appetite.Your son should benefit from having his tonsils removed when he is 2 years old.He is already on Zyrtec which is an antihistamine so he cannot have Longifene which is also an antihistamine medicine.
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