I am 47 yrs.old,5 ft.tall and 38 kilos with hyperthyroidism , hypertension, sinusitis and gastric ulcer.I have a cough for almost 3 weeks.At the first week of my cough I consulted a doctor and the doctor prescribed me an antibiotic and carbocisteine for 1 week.Last week I consulted another doctor.He prescribed me an antihistamine for 10 days. Im on the sixth day of my medication  but still suffering  from  this irritating cough. What will I do? Do I need to consult another physician?
Hi and thank you for choosing Chat Doctor to share your question. I read carefully your question and understand your concern. Your cough is considered still acute since has only three weeks. The most frequent causes of acute cough are viral infections which in general are mild and self-limiting. In some cases it can be complicated by bacterial super infection and if this happened you needed antibiotic as your treating doctor has prescribed. In the setting of sinusitis and gastric ulcer, even a simple viral infection causes more pronged cough. What kind of antihistamines did the doctor prescribed? Are you taking medicament for your gastric ulcer? Newer Antihistamines like Loratadine, levoceterizine may help in allergic rhinosinusitis, but not other forms of rhinosinusitis. For other forms are better older class of antihistamines such as chlorpheniramine/dextrometorphan. You need also a proton pump inhibitor such as pantoprazole if you are not taking one, since the acid of the stomach tends to come up in the esophagus and irritate the bronchial tree and so contributes in prolonging cough. I hope my opinion can be helpful to you. Kind Regards Chat Doctor. 