Hello Sometimes adenoids enlarged due to some allergens , so your doctor prescribed antihistamine ( loratadine ) and nasal spray , so this is necessary because all the drugs advised without physical examination of patient ( phone ). So take this treatment , and also hot saline gargles or gargles with antiseptic solution will also help . If you think , your child is having some infection then give him levofloxacin 10 mg / kg body weight , once in day orally . But this is a prescription drug , so consultation with a physician is important. Good luck.