Ventolin HFA, an albuterol formulation for EIB. https://www.ventolin.com/
I have had EIB without knowing it since I was a teen though at anything above moderate intensity. In races, teammates knew when I was coming because they could hear my coughing. It was like breathing through one of this stupid oxygen restricting masks.
The first time I tried the inhaler before a hard workout, when the intensity got up there, I started hyperventilating because I was used to having to work so hard to inhale and exhale and now my breath was just rushing in and out. I adapted quickly. But my oxygen was so restricting my performance, I didn’t realize it. I ran 5ish minute miles as a teen barely able to breathe compared to now. I used to be confused by TR talking about lactic acid buildup and burning in your legs, because I never got that. I’d always run out of air first, body parts would tingle from lack of oxygen but no lactic acid burn. Now I’m having to learn how to adapt to the discomfort of lactic acid buildup, which compared to not being able to take in adequate levels of oxygen is a minor discomfort but it’s one I’m not used to so even though it doesn’t hurt that badly my brain is throwing out “OMG WE ARE DYING!” signals from stimulus I haven’t experienced before.
After retraining with it for a year, I’m finally able to get my heart rate near max again. I can’t do FTP comparisons as my old trainer probably read 50+ watts high so I appear less fit now but I can tell I’m significantly stronger regardless. Kind of wondering what my limits are now that I can actually breathe.