I've been researching and using wild plants, medicinal and food, for a long time now.
I'm not prescribing anything here... just stating what I've used when my lungs are acting up.
For lung problems I use these plants and remedies.
For asthma, I've smoked a mixture of mullein(anti-inflamatory), cloves(numbing agent).
However this is just when I don't have an inhaler. Just putting a few drops of clove oil
on a bandanna and breathing through it can help ease an asthma attack.
For really bad upper respiratory infections I smoked a mixture of coltsfoot, mullein, and
Jimson Weed. You have to be careful with Jimson Weed(Stromonium datura) it is
dangerous stuff if you don't know how to harvest or handle it properly!
But damn can that shit dry out your lungs when your hacking up nasty shit!
Wild Cherry bark tea is also good for upper respiratory infections but is poisonous
if not prepared properly, it contains prussic acid which must be destroyed through
proper heat, time, and drying.
Myrrh, garlic, oregano, and vinegar are all excellent for healing upper respiratory
infections, and much safer to use. Oregano in particular if you have strep throat.