Montair AB Tablet SR helps prevent and treat asthma and chronic obstructive pulmonary disorder (COPD). It may also help relieve allergy symptoms such as runny and stuffy nose, sneezing, watery eyes, congestion, or stuffiness. It helps relax the muscles of the air passages thereby making it easier to breathe. Montair AB Tablet SR is taken with or without food in a dose and duration as advised by the doctor. The dose you are given will depend on your condition and how you respond to the medicine. You should keep taking this medicine for as long as your doctor recommends. If you stop treatment too early your symptoms may come back and your condition may worsen. Let your healthcare team know about all other medications you are taking as some may affect, or be affected by this medicine. The most common side effects are vomiting, upset stomach, heartburn, stomach pain, rash, itching, breathing difficulty, nasal inflammation, and flu-like symptoms. Most of these are temporary and usually resolve with time. Contact your doctor straight away if you are at all concerned about any of these side effects. This medicine may also cause dizziness and sleepiness, so do not drive or do anything that requires mental focus until you know how this medicine affects you. Avoid drinking alcohol while taking this medicine as it can worsen your sleepiness. Before taking it, you should tell your doctor if you have any kidney or liver diseases so that your doctor can prescribe a suitable dose for you. You should also tell your doctor if you are pregnant, planning pregnancy, or breastfeeding.