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The tables below contain a sample list of benzodiazepines and benzodiazepine analogs that are commonly prescribed, with their basic pharmacological characteristics, such as half-life and equivalent doses to other benzodiazepines, also listed, along with their trade names and primary uses.
An equianalgesic chart can be a useful tool, but the user must take care to correct for all relevant variables such as route of administration, cross tolerance, half-life and the bioavailability of a drug. [5] For example, the narcotic levorphanol is 4–8 times stronger than morphine, but also has a much longer half-life. Simply switching the ...
Etizolam (marketed under numerous brand names) is a thienodiazepine derivative [5] which is a benzodiazepine analog. [6] The etizolam molecule differs from a benzodiazepine in that the benzene ring has been replaced by a thiophene ring and triazole ring has been fused, making the drug a thienotriazolodiazepine. [7] [8]
A benzodiazepine can be placed into one of three groups by its elimination half-life, or time it takes for the body to eliminate half of the dose. [189] Some benzodiazepines have long-acting active metabolites , such as diazepam and chlordiazepoxide, which are metabolised into desmethyldiazepam .
The half-life of chlordiazepoxide is from 5 to 30 hours but has an active benzodiazepine metabolite, nordiazepam, which has a half-life of 36 to 200 hours. [31] The half-life of chlordiazepoxide increases significantly in the elderly, which may result in prolonged action as well as accumulation of the drug during repeated administration.
Clorazepate is a long-acting benzodiazepine drug. [10] Clorazepate produces the active metabolite desmethyl-diazepam, which is a partial agonist of the GABA A receptor and has a half life of 20–179 hours; a small amount of desmethyldiazepam is further metabolised into oxazepam.
Its elimination half-life is 51–103 hours. [8] Its mechanism of action is similar to other benzodiazepines. Ethyl loflazepate also produces an active metabolite which is stronger than the parent compound. [9] Ethyl loflazepate was designed to be a prodrug for descarboxyloflazepate, its active metabolite.
Nitrazepam is a long-acting benzodiazepine with an elimination half-life of 15–38 hours (mean elimination half-life 26 hours). [12] Residual "hangover" effects after nighttime administration of nitrazepam such as sleepiness, impaired psychomotor and cognitive functions may persist into the next day, which may impair the ability of users to ...