<prompt> Which of the following is not a non-sedating antiallergic drug?CetrizineAstemizoleTerfenadineTriprolidine  <response>: Ans. is d i.e., Triprolidine o Second generation antihistaminics have no CNS depressant action sedation, diminished aleness o Cetrizine, astemizole and terfenadine are second generation antihistaminics. o Triprolidine is first generation antihistaminic with mild sedative propey. 