hi thank you for the query sir I have gone through your query ...after going through your query I want to discuss with you the complications to be taken care of in dengue fever ... in dengue fever which is often a hemorrhagic fever may develop complications like renal failure ..elevated liver enzymes ..thrombocytopenia.. and third spaces fluid loss ...a capillary leak do occur in hemorrhagic fevers where fluid accumulates in peritoneum, pleural sac .. pleural effusion is one suc manifestation of capillary leak syndrome ...dry cough in your case could be due to pleural effusion which develops on lying down...I would like to suggest you to get a chest xray done and re-evalute the case once again....I don t think it as a side effect of anti biotic taken....vomittings could be due to cepodem but not cough ... hope I have answered your query would welcome follow up queries... thank you regards DR Alekhya