I once had a chronic asthma-like condition and gave up on doctors as they tried their best but nothing they did stopped it.
That's when I took matters into my own hands. I started by blending honey, ice water, apple cider vinegar and garlic and sipping on it. That did more good than anything else I had done.
Ester C and fish oil are also worth exploring.
I no longer have the condition but I also found during the experience that cough syrups were very dangerous. I had some very bad reactions to them.
I will look into it, thank you!