Search in the website EMC -
https://www.medicines.org.uk/emc, by filling the field "Search medicine name" with the text "foradil". Select the Patient Leaflet section, and then hit the respective "View or print the patient leaflet as pdf" button.
The leaflet refers that one should "hold your breath for as long as you comfortably can", without specifying for how long. So, how long should we hold our breath?
A review
[1] published in the European Respiratory Society Open Research journal states that in order to enhance drug deposition in the respiratory tract,
apnea should last ideally
10 seconds, and a minimum of 4 seconds. If not possible, it should be considered the use of a spacer device.
