Are you on any statin drug? Statin drugs are used to lower cholesterol levels and may cause side effects such as coughing. What does your doctor say about other possible medication interaction? Have they ruled out chronic bronchitis?Another thought, is it possible that it's fluid retention in your chest? Have they done an ultrasound or xray?You sound very frustrated and I would be too. Coughing for a year?? Jeeez!!Do you know what your antibody level is? Perhaps there's a reason you seem to wait longer that others on the list. What about a living donor? Forgive me if you've answered all this before, I am off the forum periodically on another volunteer project. Here's a hug!
I had post nasal drip for over a year and it made me cough like that. When the doctor finally gave me something to stop that drip the cough went away. It was irritating my throat which caused me to cough.