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.