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

### input:
Hi,I am 35 yrs old, 168cm tall, 55kg and generally have no health issues except the usual flu every year. The only medication I have taken in the last couple of months is Duromine (30mg - 1 per day) which I have ceased now I am at my weight. When I was taking Duromine it was not every day, sometimes I had a week without taking any.  I ceased taking it approx 3 weeks ago.For the past 2 months I have a constant recurring mucus buildup in the back area of the nasal pasage. It is sticky, very clear and I feel like trying to clear it all the time but nothing comes out. I do not have a sore throat and when I blow my nose nothing comes out.  About 2-3 times per day I will cough and bring up similar mucus but much thicker and not so clear - but not coloured, however sometimes it has brown/black spots in it - which could be coffee or food colour? I used to smoke cigarettes and gave up 5 months ago. I have 4 kids who seem to constantly bring home the flu or a virus, and over the last couple of months my 2 yr old always seems to be getting some sort of virus with runnig nose (from childcare).  When trying to swallow somtimes I feel like i am drowning, and after numerous attempts to blow my nose or try and clear my throat, I feel very weak and dizzy and get short of breath.The flu has been going around for many months now here, and all the doctors just keep saying it is the flu virus.  I have never had this before.

### output:

Hi, Thank you for contacting Chat Doctor. I have reviewed your query, and I understand that you have recurrent flu with symptoms of Cory with clear sputum. These symptoms can be caused by Allergies as well as certain viruses. Since the sputum is clear I would not feel the need to prescribe Antibiotics. If I were your physician, I would recommend an anti-allergic such as Fexofenadine 60 mg Twice daily for 5 days. And Acetaminophen for fever if experienced. You should not be concerned about the brown black spots in your sputum as they would most probably be small blood clots caused due to coughing or clearing your throat. It is quite normal. Hope this answers your question. If you have additional questions or follow-up questions then please do not hesitate in writing to us. Wishing him good health.