My 3 year old daughter has been coughing at night for two weeks. My wife took her to the doctor yesterday to check if it was bronchitis. It was not or a bacterial infection but the peditrician prescribed Allegra for her. She was better last night than before, so I hope this is the best thing. We had given her Claritin OTC but it did not do much. The generic Benadryl worked a little better.