Multiple choice Which of the following drugs is not a tranquiliser? Ativan Xanax Halcyon Prosom Ceftazidime Reveal answer Fill a bubble to check yourself E Correct answer Explanation Some examples of tranquilisers are included- Valium (diazepam), Librium/Novopoxide (chlordiazepoxide), Halcion (triazolam), ProSom (estazolam), Xanax, Ativan, etc. But ceftazidime is a 3rd generation cephalosporin antibiotic.