AB Flo SR Tablet is used to treat and prevent symptoms of asthma and chronic obstructive pulmonary disorder a lung disorder in which flow of air to the lung is blocked It helps in relaxing the muscles of the air passages thus widening it and making it easier to breathe AB Flo SR Tablet can be taken with the food in evening But take it at the same time every day to get the most benefit The dose and how often you take it depends on what you are taking it for Your doctor will decide how much you need to improve your symptoms You should take this medicine for as long as it is prescribed for you Do not miss even a single dose if in any case you missed a dose take it as soon as you remember or better to skip the missed dose and continue with regular dosing It does not work immediately or prevent the already started breathing trouble hence always carry your medical inhaler with you for an emergency