Anti-inflammatory Controllers
Calming the underlying inflammation — inhaled steroids, leukotriene drugs, and biologics.
Inhaled Corticosteroids: The Drug That Actually Treats Asthma
Bronchodilators open the airway, but they don't treat the disease. The inhaled corticosteroid does — it calms the underlying inflammation that makes asthma dangerous, which is why it's the true cornerstone of asthma treatment. And by delivering a powerful steroid straight to the lungs, it captures all the benefit of steroids with almost none of their whole-body cost.
Leukotriene Antagonists, Theophylline & Other Controllers
When an inhaled steroid and a bronchodilator aren't quite enough, a handful of other controllers can be added — each working in a different way. One is a convenient tablet for mild asthma and allergies, one is a powerful but tricky old drug that needs blood tests, and one is a preventer you take before you meet your trigger. Knowing what each is for rounds out the asthma toolkit.
Biologics for Severe Asthma: Precision-Guided Antibodies
For the small group of people whose asthma stays severe despite maximal inhalers, a newer kind of drug has been transformative: laboratory-made antibodies that block a single, specific molecule driving their inflammation. Understanding them means understanding a beautiful idea — targeting the exact chemical signal behind one patient's disease.

