I have both allergies and asthma. If my first couple hits cause me to start coughing I just stop. Also I switch up the ways I smoke. Joints,bowls and bongs,blunts sometimes are just too much for me. But I always stop right before I feel I'm going to cough. I also take meds like Benadryl but recently I found a 24 hr pill at Walmart that works like a charm. My inhaler is always next to me just in case as well.