Re: 10 year old has cough for 9 years
Nine years, good heavens! Go to a different doctor. Ideally you want a pulmonologist. If you need a referral, ask to see a different pediatrician, as this one is not addressing your daughter's problem.
Non-narcotic cough medicines are usually not effective in children, and codeine needs to be used pretty carefully. But a chronic cough is usually either asthma or acid reflux, which are both treatable.