<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi my name is xxx I ve had asthma for about 14 years now but it s gotten really bad since December 2012. I m experiencing tightness from left to right above my chest and am only getting a peak flow of 150-230. The pain is worse when I breath in . I m on my 3rd set of steroids and antibiotics . I would be grateful for any feedback you coukd give me thanks  <response>: Hello Pauline... Asthma is caused due to bronchoconstriction obstruction of smaller airway passages which is indicative of Hyper-responsiveness of air passages to an allergen. Bronchodilators steroids will provide symptomatic relief by causing bronchodilator dilating the smaller airway passages, relieving the obstruction increasing airflow to lungs Montelukast preparation, can also be used as a maintenance therapy to relieve symptoms of seasonal allergies asthma by reducing bronchoconstriction. So.the medicines given by the Doctor is correct...please continue them as advised. And make sure that you are well protected from cold, dust other allergens. Wishing a good health. Thanks take care. 