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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.
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 [6] The etizolam molecule differs from a benzodiazepine in that the benzene ring has been replaced by a thiophene ring and triazole ring has been fused, making the drug a thienotriazolodiazepine.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]
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 ...
Rebound insomnia, however, is more common upon discontinuation of intermediate-acting benzodiazepines than longer-acting benzodiazepines. Examples are alprazolam, estazolam, flunitrazepam, clonazepam, lormetazepam, lorazepam, nitrazepam, and temazepam. Long-acting compounds have a half-life of 40–250 hours.
Flurazepam [2] (marketed under the brand names Dalmane and Dalmadorm) is a drug which is a benzodiazepine derivative. It possesses anxiolytic, anticonvulsant, hypnotic, sedative and skeletal muscle relaxant properties. It produces a metabolite with a long half-life, which may stay in the bloodstream for days. [3]
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.
Delorazepam is mainly used as an anxiolytic because of its long elimination half-life; showing superiority over the short-acting drug lorazepam. [11] In comparison with the antidepressant drugs, paroxetine and imipramine, delorazepam was found to be more effective in the short-term but after 4 weeks the antidepressants showed superior anti-anxiety effects.
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.