### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I have a reactive airway from a virus for the past 3 weeks. Had spirometry done (normal) and clear chest X-ray . No fever, clear mucus / post Neal drip....causes gagging, coughing, laryngeal spasms. Taking xopenex to open airway (works well) and on last to days of Medrol pack. Only problem is the xopenex makes me very jittery, extreme fatigue,headache, increased HR until it starts wearing off after about 3-4 hours. At about 5 hours I can feel my airways starting to constrict...I try to get to 6 hours so I can avoid the side effects. I have been using the inhaler every 6 hours for the past couple of weeks. Questions 1. Is it ok to keep usIng like this until the virus is gone....repeated side effects? 2. Can one become dependent.....therefore needing every 6 hours or is it because there is still illness and the inhaler simply wore off? 3. Is an antihistamine like Zytec ok to take to try to dry up the PND?

### output:

Hello. Interesting question. You seem to be well-read. However, there seems to be some communication gap. You said that the airways constrict. You mean airways in chest or the nasal passages? I suspect that you mean that your nostrils get blocked (because your spirometry is normal). Nostrils normally get congested (swollen) and they do get blocked. However, they do not constrict because there are no smooth muscles in the nasal passages! Normally, a virus infection does not last for 3 weeks. So this is post viral reactive airway causing airway (here I mean chest airways) constriction and post nasal Chat Doctor.  If the 