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This is the list of Schedule I controlled substances in the United States as defined by the Controlled Substances Act. [1] The following findings are required for substances to be placed in this schedule: [2]
Preoperational anxiety, or preoperative anxiety, is a common reaction experienced by patients who are admitted to a hospital for surgery. [1] It can be described as an unpleasant state of tension or uneasiness that results from a patient's doubts or fears before an operation.
Diazepam is a Schedule 4 substance under the Poisons Standard (June 2018). [138] A Schedule 4 drug is outlined in the Poisons Act 1964 as, "Substances, the use or supply of which should be by or on the order of persons permitted by State or Territory legislation to prescribe and should be available from a pharmacist on prescription". [138]
In terms of the mechanism of action of benzodiazepines, their similarities are too great to separate them into individual categories such as anxiolytic or hypnotic. For example, a hypnotic administered in low doses produces anxiety-relieving effects, whereas a benzodiazepine marketed as an anti-anxiety drug at higher doses induces sleep. [182]
Like other benzodiazepines, phenazepam (7-bromo-5-(2-chlorophenyl)-1,3-dihydro-1,4-benzodiazepin-2-one) is composed of a benzene ring fused to a seven-membered 1,4-diazepine ring. A 2-chlorophenyl ring is attached at the 5-position and a bromine is attached at the 7-position.
An initial dose is usually taken approximately one hour before the dental appointment. [1] Treatment may include additional dosing on the night proceeding the procedure, to mitigate anxiety-related insomnia. [1] The procedure is generally recognized as safe, with the effective dosages being below levels sufficient to impair breathing. [2]
It is mainly an anti-anxiety agent with similar side effects to diazepam. In addition to being used to treat anxiety or panic states, bromazepam may be used as a premedicant prior to minor surgery. Bromazepam typically comes in doses of 3 mg and 6 mg tablets. [4] It was patented in 1961 by Roche and approved for medical use in 1974. [5]
In 1963, approval for use was given to diazepam (Valium), a "simplified" version of chlordiazepoxide, primarily to counteract anxiety symptoms. Sleep-related problems were treated with nitrazepam (Mogadon), which was introduced in 1972, temazepam (Restoril), which was introduced in 1979, and flurazepam (Dalmane), which was introduced in 1975.