I am Female 33 years. Dry cough and wheezing breathing problem and left side chest pain some time blood in cough. Low graded fever very often. Chest x-ray shows left mid para hillar region infective changes. With chest pain left side back and shoulder pain also occurs. Unable to lie on left side. With antibiotics and paracetamol pain reduced but again occurs after few days during increase pain the painful area swells at back and shoulder it decrease as pain decreases. Allegra M is taken when breathing problem occurs it helps to some extent again it increases. How long Allegra M can be taken.