This depends on which test is being performed and what question is being asked. For a diagnostic spirometry — where the aim is to see your ‘true’ baseline obstruction — short-acting bronchodilators should be withheld for 4–6 hours and long-acting bronchodilators for 12–24 hours. For a monitoring spirometry — where the aim is to assess your lung function on optimised treatment — taking your inhalers as usual is correct. Dr. Dixit Kumar Thakur at Pulmovista Clinics will give you specific instructions before your appointment based on the clinical question being answered. If in doubt, call the clinic before your appointment.
