Multiple choice Which of the following is not an antihistamine agent? Dexamethasone loratadine Cetrizine Cladribine Clemestine Reveal answer Fill a bubble to check yourself D Correct answer Explanation Antihistamines reduce or block histamines, so they stop allergy symptoms. Examples are- Cetrizine, Betamethasone, dexamethasone, hydroxyzine, loratadine, clemestine, etc. Cladribine is used as chemotherapy drug.