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suppress the cough center in the brain. they are used to treat chronic bronchitis and nonproductive coughs. (Robitussin)
prevent and treat influenza virus infection in at-risk patients with asthma or lung disease
dilate constricted airways by relaxing the smooth muscles that surround the bronchioles. They are used to treat asthma, COPD, emphysema, and cystic fibrosis. They are given orally or inhaled through a metered-dose inhaler (MDI)
block the immune system from causing inflammation in the lung. They are used to treat asthma and COPD. They are given by a metered-dose inhaler, orally, or intravenously
leukotriene receptor blocker drugs
block leukotriene, which causes inflammation and edema. Used to treat asthma (singulair)
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