Hello Doctor.. My 3 Year Old Son Is Having A

Hello doctor.. My 3 year old son is having a small enlarged lymph node in back of his neck.. today we take him to doctor and he advised blood test. His total rbc,wbc,platelet counts are normal but the eosnophil count is 11% . Doctor has advised him Chlorpheniramine Maleate, Diethylcarbamazine Citrate for three weeks..I am concered about the high eosinophil levels.