What Causes Recurring Dry Cough?

Hello You are having dry cough from 14th May and still on 23rd June dry cough with loss of voice ??? may be hoarseness of voice . Took azithromycin antibiotic with promethazine + codeine syrup ( most effective and cough suppressant ) . No relief , than took cefdinir antibiotic again most effective for U R I , this time also prescribed prednisolone ,but no relief. Doctor diagnosed it as bronchitis . All these symptoms are suggestive of ASTHMATIC ALLERGIC BRONCHITIS ( a precursor of asthma ) . Dry hacking cough , shortness of breath, wheezing , chest tightness , cough aggravated early in the morning. All these symptoms may be due to some allergens , as these causes bronchoconstriction , hence this causes bronchospasm , this causes cough ( dry usually in nature ) . But if infection also present then there may be mucus formation . In your case loss of voice may be due to throat allergy and infection. Take dextromethophan tablets for local throat infection and irritation. Gargles with antiseptic solution ( medicated )also helps. When such patient visit I only advise them to take monteleukast+ bambuterol tablet twice in day . Levofloxacin 750 mg / day ( once in day ) for 5-7 days . In my opinion this treatment will suit you. Since this is a prescription treatment so consult a physician and get his opinion. Hot coffee and steam inhalation will provide prompt relief in voice and throat. Good luck.