Inhibition of CNS 2nd Level of Inhibition of CNS Drugs: α2 Agonists: Xylasine Detomidine Medetomidine Dexmedetomidine Romifidine Tasipimidine Benzodiazepines (BDZ): Diazepam Midazolam Alprazolam Lorazepam Barbiturates: Phenobarbital