This article needs attention from an expert in medicine.(March 2011)
Drug-induced amnesia is amnesia caused by drugs. Amnesia may be therapeutic for medical treatment or for medical procedures, or it may be a side-effect of a drug, such as alcohol, or certain medications for psychiatric disorders, such as benzodiazepines.
Amnesia is desirable during surgery, since a general anaesthetic should also give the person amnesia for 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). Amnesiac drugs can be used to induce a coma for a child breathing using mechanical ventilation, or to help reduce intracranial pressure after head trauma.
Researchers are currently experimenting with drugs which induce amnesia in order to improve understanding of human memory, and develop better drugs to treat psychiatric disorders and memory related disorders. People with Alzheimer's disease and other forms of dementia are likely to benefit. By understanding the ways in which amnesia-inducing drugs interact with the brain, researchers hope to better understand the ways in which neurotransmitters aid in the formation of memory. By stimulating rather than depressing these neurotransmitters, memory may improve.
The use of a drug to erase traumatic or unwanted memories used to be referred to as "science fiction." Holmes et al. (2010) commented that the media misrepresented two recent studies as research on "erasing" traumatic memories, but showed the fear response associated with stressful memory could be greatly reduced whilst the factual memory of the trauma remained intact. Similarly, Brunet et al. (2008) found that the people with chronic Posttraumatic Stress Disorder who were treated with propranolol for a single day had a reduced response to existing trauma while retaining memory of the trauma. In the process of remembering, the memory needs to be restored in the brain. By introducing an amnesia-inducing drug during this process, the memory can be disrupted. While the memory remains intact, the emotional reaction is dampened, making the memory less overwhelming. Researchers believe this drug will help patients with post-traumatic stress disorder be able to better process the trauma without reliving the trauma emotionally. This has raised legal/ethical concerns should drugs be found to have altered the memory of traumatic events that occur in victims of crimes (e.g. rape), and whether it is therapeutically desirable to do so.
Non-medical drug-induced amnesia
The most commonly used group of prescription drugs which can produce amnesia are benzodiazepines, especially if combined with alcohol, however, in limited quantities, triazolam (Halcion) is not associated with amnesia or memory impairment.
In popular culture
- In the 1970 science fiction TV series UFO, amnesia drugs were given to anyone who had contact with SHADO operatives, or witnessed their covert activities.
- In Eternal Sunshine of the Spotless Mind (2004), Joel Barish (Jim Carrey) decides to forget his former lover Clementine Kruczynski (Kate Winslet) after she erases her memories of him. As the memory erasure begins, he changes his mind and tries to keep the memories.
- In an episode of the TV series Private Practice, a patient requests propranolol in order to forget a sexual assault. The drug is never used because of possible side effects and its experimental status.
- The characters in The Hangover (2009) deal with the aftermath of amnesia after taking roofies.
- An episode of Arrested Development called Forget-Me-Now discusses the use of drug-induced amnesia for those who have figured out the magician's tricks (or illusions).
- In the PC Game Amnesia: The Dark Descent (2010), the player character, Daniel, wakes up with self-induced amnesia in the terrifying Castle Brennenburg, and must discover the truth about his memories.
- In the book Allegiant (2013) a "memory serum" is used to wipe people's memories.
- The SCP Foundation has referenced amnesia-inducing drugs in many of its articles since its conception, under the name "amnesiacs", and, more recently, "amnestics", usually as a means of ensuring secrecy from the public.
- In the teen fiction novel The Maze Runner, the teen characters wake up in a drug induced amnesia, which is one of the main factors that drive the plot.
- In the series 3 episode of Doctor Who, Gridlock, drugs that induce amnesia are sold in patch form with the name "forget."
- In the TV series Blindspot, the memory of the main character, Jane, was totally wiped using a drug called ZIP.
- In the stealth action game Yandere Simulator, Musume Ronshaku is the most flashy girl in Akademi High and spoiled rotten by her father. After being kidnapped by Yandere-chan, she will be nervous, paranoid, and traumatized for life, no longer retaining her Social Butterfly personality. She cannot seek help as she has drug-induced amnesia.
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- Bernstein, Daniel (2003). Pediatrics for Medical Students. Philadelphia: Lippincott Williams & Wilkins. ISBN 0781729416.
- Holmes, E. A., Sandberg, A., & Iyadurai, L. (2010). Erasing trauma memories. The British Journal of Psychiatry, 197(5), 414-415.
- Brunet, A1, Orr, SP, Tremblay, J., Robertson, K., Nader, K., Pitman, RK (May 2008). "Effect of post-retrieval propranolol on psychophysiologic responding during subsequent script-driven traumatic imagery in post-traumatic stress disorder". J Psychiatr Res. pp. 503–6. PMID 17588604.
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- Sadock, Benjamin (2008). Kaplan & Sadock's concise textbook of clinical psychiatry. Philadelphia: Wolters Kluwer/Lippincott Williams & Wilkins. ISBN 0781787467.
- Gray, Richard. "Scientists find drug to banish bad memories." The Telegraph, 2007 Jul 1.
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- "NIMH » Memory-sustaining Enzyme May Help Treat PTSD, Cognitive Decline". www.nimh.nih.gov. Retrieved 2016-12-28.
- "Scientists raise new questions on molecular key to memory". Ars Technica. Retrieved 2016-12-28.
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