妈妈咳嗽了半年多了都不见好，看了很多医生吃了很多药，一直没好转，好像已经转成哮喘了，该怎么办呀。

这边有什么好的药么？

first of all, where is your mom? here in the states? how did she start with the cough? was there an infection prior to the cough? I suspect a cold or atypical pneumonia may have triggered it, sometimes these coughs can be a remnant of the infection, and may last for more than 2 weeks. in this case, usually a chest xray should be done, and if nothing suspcious on the xray, usually some cough supressants maybe effective in controling the symptoms.

Now, if your mom continues coughing, then you'll have to tell us more of her history, did she smoke before? how long? has she ever been diagnosed with chronic lung diseases such as COPD? asthma is not uncommon when they appear in adults, but usually these patients may have had asthma when they were young, and it wasn't until much later in their life that dust, pollen, roaches, grasses may trigger their immune systems and cause symptoms to occur, of course, usual colds or infections may also be the common culprits. Usually, if nothing helped, she may need to go see a pulmonary or allergy and immunology doctor, they will do a pulmonary function test and a peak flow volume measurements, and if asthma is suspected, Advair, singulair, albuterol are all usual drug for treatment, but they all need prescriptions. if doctors suspect chronic obstructive pulmonary diseases(emphysema or chrnoic bronchitis), then you should request them to refer your mother to a pulmonary specialty clinic to be evaluated or at least internal medicine clinics, instead of family medicine clinics. good luck!