Table 2 Asthma medication prescription and usage as a function of FEV1%, based on NHLBI guidelines given asthma severity classification[8]
From: The effects of indoor environmental exposures on pediatric asthma: a discrete event simulation model
FEV1% |   Prescription |   Usage |
|---|---|---|
>80% | Albuterol | Take on days with asthma symptoms |
| Â | One controller medicine | Daily |
60-80% | Albuterol | Take on days with asthma symptoms |
| Â | Two controller medicines | Daily |
<60% | Albuterol | Take on days with asthma symptoms |
| Â | Three controller medicines | Daily |