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A box of Lorazepam Orion (Lorazepam) tablets. Lorazepam, sold under the brand name Ativan among others, is a benzodiazepine medication. [14] It is used to treat anxiety (including anxiety disorders), trouble sleeping, severe agitation, active seizures including status epilepticus, alcohol withdrawal, and chemotherapy-induced nausea and vomiting. [14]
Amnesia is desirable during surgery, so general anaesthesia procedures are designed to induce it for the duration of the operation. Sedatives such as benzodiazepines, which are commonly used for anxiety disorders, can reduce the encoding of new memories, particularly in high doses (for example, prior to surgery in order for a person not to recall the surgery). [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.
The changes are most notable with long acting benzodiazepines as these are prone to significant accumulation in such individuals and can lead to withdrawal symptoms. [citation needed] For example, the equivalent dose of diazepam in an elderly individual on lorazepam may be half of what would be expected in a younger individual.
These long-acting metabolites are partial agonists. [6] [145] Short-acting compounds have a median half-life of 1–12 hours. They have few residual effects if taken before bedtime, rebound insomnia may occur upon discontinuation, and they might cause daytime withdrawal symptoms such as next day rebound anxiety with prolonged usage.
This antagonism can precipitate acute withdrawal symptoms, that can persist for weeks or months before subsiding. The symptoms include depression, anxiety, psychosis, paranoia, severe insomnia, paresthesia, tinnitus, hypersensitivity to light (photophobia) and sound (hyperacusis), tremors, status epilepticus, suicidal thoughts and suicide ...