<prompt> Which of the following drug is a long acting beta-2 agonist?AlbuterolSalmeterolPirbuterolOrciprenaline  <response>: Ans. B SalmeterolRef: KDT 8the p243 5th200Salmeterol is a long acting b2 agonist whereas albuterol salbutamol, pirbuterol and orciprenaline are short acting agents. 