<prompt> b2 agonist with a long duration of action isSalbutamolTerbutalineSalmeterolAlbuterol  <response>: A new generation of long-acting b2- selective agonists includes salmeterol a paial agonist and formoterol a full agonist. Both drugs are potent selective b2 agonists that achieve their long duration of action 12 hours or more as a result of high lipid solubility. These drugs appear to interact with inhaled coicosteroids to improve asthma control. Because they have no anti-inflammatory action, they are not recommended as monotherapy for asthma. An ultra-long-acting b agonist, indacaterol, is currently approved in Europe. It needs to be taken only once a day but is used only for the treatment of chronic obstructive pulmonary disease COPD. Data on its efficacy and safety in the management of asthma are lacking. Reference: Katzung Pharmacology; 13th edition; Chapter 20; Drugs Used in Asthma 