5 year old cough. Has been going on for 6 weeks. Been to dr. 5 times. Tried antibiotic, singulair, (montelukast) and Claritin. No cough when asleep. Help?

Habit or Tic? There are many causes of cough, sounds like your doctor has tried treatment for several. More information is needed to know the cause. Cough that is present only during the day may be due to a habit cough or tic.
Possible habit cough. Occasionally a child develops a habit of coughing, like sucking their thumb. It's not something they think about doing, it just happens. They aren't doing it on purpose. Most other causes of cough would happen even when sleeping. Many pediatric pulmonology (lung) offices have someone that specializes in therapy for habit cough.