A spoonful of warm honey with cinnamon. Or a spoonful of pineapple juice. Both pineapple juice and honey are natural antimicrobials that will kill the bacteria and cinnamon is an anti inflammatory that will soothe the bronchials. Plus honey will coat the throat. You could also try Little Remedies all natural buckwheat honey cough syrup. No alcohol or anything, it's just straight pasteurized buckwheat honey. Works wonders when my daughter has a cough and she's about to be 5. I've used it since she was 6 months old.