Is it possible to be...?

allergic to secondhand smoke? i don't smoke. whenever i'm around people who are smoking, my eyes get watery, my throat gets dry, i cough, and i have trouble breathing after a while.

u are definitely allergic to secondhand smoke, stay away from those smokers.

Smoke of any kind is an irritant - whether you're inhaling from the source or secondhand. It's probably not an allergy, just an irritation of your eyes and airways. Just take a step back from it and keep upwind if possible.

Yes, I'm pretty allergic to secondhand smoke myself, I have to immediately take medicine before my throat starts to close.

You sounded like one. Anyway, get some pills from doctors and spare them in your pocket. if you face this problem again, try taking the pills. it worked for me, i hope it does on you too. God Bless.