Breavent 200mcg Rotacap for Asthma & Breathing ReliefBreavent 200mcg Rotacap Fast Relief from Breathing Difficulty Breavent 200mcg Rotacap contains salbutamol, a short acting bronchodilator that helps relax and widen the air passages in the lungs. It is commonly used to relieve and prevent bronchospasm in patients with asthma, chronic bronchitis, and chronic obstructive pulmonary disease (COPD). Salbutamol works by stimulating beta 2 receptors in the airway muscles, causing them to relax. This action