 [ Symptoms ] what are the statistics on high blood pressure in men [ Disease ] first steroid nasal sprays if used properly will not weaken your son is immune system they are very safe and effective medications for treating allergy symptoms many steroid nasal sprays are indicated for children as young as two years old so i am not sure which nasal spray was prescribed for your son or where the information you are reading came from i would suggest you check with your pharmacist if you are concerned