| What if I use inhalers, nebulizers, or oral asthma medications?
 | Some medications can interfere with the breathing tests. If possible, do not take these medications before your medical testing, as described below. However, if you need to use your medication, please do so and still have the medical testing. If you have any questions, please contact your healthcare provider. You may also contact the NIOSH physician at  1-800-232-2114.
 | 
| Medication
 | Examples
 | Instructions
 | 
| Short-acting        β-agonist bronchodilators (inhaler or nebulizer)
 | AccuNeb Albuterol  Asmavent  Levalbuterol  Maxair Autohaler  ProAir HFA Proventil HFA 
 | Pirbuterol  Salbutamol Ventolin HFA VoSpire ER Xopenex Xopenex HFA
 | If possible, please skip for   4 hours before your medical testing.   
 | 
| Short-acting anticholinergic bronchodilators (inhaler)
 | Atrovent Atrovent HFA
 | Combivent Duoneb Ipratropium
 | If possible, please skip for   4 hours before your medical testing.  
 | 
| Long-acting                 β-agonist bronchodilators with or without steroids (inhaler or nebulizer)
 | Advair  Advair HFA  Arformoterol  Brovana Dulera  Foradil
 | Formoterol Perforomist  Salmeterol  Serevent Diskus  Symbicort
 
 | If possible, please skip for 12 hours before your medical testing.
 | 
| Long-acting anticholinergic bronchodilators (inhaler)
 
 | Spiriva
 
 | Tiotropium 
 | If possible, please skip for 24 hours before your medical testing. 
 | 
| Leukotriene modifiers  (oral medication)
 
 | Accolate Montelukast  Singulair
 
 | Zafirlukast Zileuton  Zyflo CR
 
 | If possible, please skip for 24 hours before your medical testing.
 | 
|  | Steroid inhalers
 | AeroBid AeroBid-M  Aerospan Alvesco  Asmanex Twisthaler Azmacort Beclomethasone Budesonide  Ciclesonide
 | Flovent HFA  Flovent Diskus  Flunisolide Fluticasone  Mometasone  Pulmicort Respules   Pulmicort Flexhaler  QVAR  Triamcinolone
 | If possible, do not take on day of testing.
 |