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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.
Desmethyldiazepam has a half-life of 36–200 hours, and flurazepam, with the main active metabolite of desalkylflurazepam, with a half-life of 40–250 hours. These long-acting metabolites are partial agonists. [6] [145] Short-acting compounds have a median half-life of 1–12 hours.
Lorazepam-glucuronide is more water-soluble than its precursor, so gets more widely distributed in the body, leading to a longer half-life than lorazepam. Lorazepam-glucuronide is eventually excreted by the kidneys, [ 98 ] and, because of its tissue accumulation, it remains detectable, particularly in the urine, for substantially longer than ...
Diazepam, sold under the brand name Valium among others, is a medicine of the benzodiazepine family that acts as an anxiolytic. [15] It is used to treat a range of conditions, including anxiety, seizures, alcohol withdrawal syndrome, muscle spasms, insomnia, and restless legs syndrome. [15]
Benzodiazepines with a half-life of less than 24 hours include alprazolam, bromazepam, brotizolam, flunitrazepam, loprazolam, lorazepam, lormetazepam, midazolam, nitrazepam, oxazepam, and temazepam. [111] The resultant equivalent dose is then gradually reduced.
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.
So, for example, digoxin has a half-life (or t 1 / 2 ) of 24–36 h; this means that a change in the dose will take the best part of a week to take full effect. For this reason, drugs with a long half-life (e.g., amiodarone , elimination t 1 / 2 of about 58 days) are usually started with a loading dose to achieve their desired ...
[26] [27] The half-life of oxazepam is between 6 and 9 hours. [5] [4] [28] It has been shown to suppress cortisol levels. [29] Oxazepam is the most slowly absorbed and has the slowest onset of action of all the common benzodiazepines according to one British study. [30]