Backaround Sedative-hypnotics are a group of drugs that cause CNS depression. Benzodiazepines (BZD) the most commonly barbiturates used agents nonbarbiturate nonbenzodiazepine sedative- hypnotics(NBNB)
Background Carbon monoxide(CO) is a colorless, odorless gas produced by incomplete combustion of carbonaceous material CO is formed as by-product of burning organic compounds