I posted this for the other guy that was asking about asthma but here it goes:

I have had asthma for 18 years now (my whole life) and I have a very very very bad case of asthma and have to use my puffer constantly and am still seeing asthma specialists

Marijuana has never made me short of breath at all, It makes it better.

I've never had to use my puffer once or had wheezing or any asthma effects during toking time, infact one time I was all out of my medication so what I did was smoke weed, couple minutes later I was good to go. The weed actually takes AWAY my asthma.