Indication |
For short-term and intermittent use in patients with recurring insomnia and poor sleeping habits |
Pharmacodynamics |
Flurazepam, a benzodiazepine derivative, is a hypnotic agent
which does not appear to decrease dream time as measured by rapid eye
movements (REM). Furthermore, it decreases sleep latency and number of
awakenings for a consequent increase in total sleep time. |
Mechanism of action |
Flurazepam binds to an allosteric site on GABA-A receptors.
Binding potentiates the action of GABA on GABA-A receptors by opening
the chloride channel within the receptor, causing chloride influx and
hyperpolarization. |
Absorption |
Flurazepam hydrochloride is rapidly (30 minutes) absorbed from the gastrointestinal tract |
Volume of distribution |
Not Available |
Protein binding |
83% |
Metabolism |
Flurazepam is rapidly metabolized and is excreted primarily in
the urine. Both hydroxyethyl flurazepam (the major metabolite) and
N-desalkyl flurazepam are active. The N-desalkyl metabolite is slowly
excreted in the urine as the conjugated form |
Route of elimination |
Flurazepam is rapidly metabolized and is excreted primarily in the
urine. Less than 1% of the dose is excreted in the urine as
N1-desalkyl-flurazepam. |
Half life |
The mean apparent half-life of flurazepam is 2.3 hours. The half
life of elimination of N1-des-alkyl- flurazepam ranged from 47 to 100
hours |
Clearance |
Not Available |
Toxicity |
Coma, confusion, low blood pressure, sleepiness |