Interrupted Memories: Alcohol-Induced Blackouts National Institute on Alcohol Abuse and Alcoholism NIAAA

Unlike type 1 diabetes, which involves an insufficient production of insulin in the body, type 2 diabetes refers to having insulin resistance. While there are differences in treatment for type 1 and type 2 diabetes, the advice for alcohol use and diabetes management is similar. Any person with diabetes type 1 or type 2 that chooses to drink alcohol is advised to monitor their drinking very closely. Excessive drinking and alcohol use can become dangerous quickly for diabetics. Most reports suggest middle-age males with alcoholism are more likely to black out.

Blackouts are not necessarily a sign of alcohol use disorder, but experiencing even one is a reason for concern and should prompt people to consider their relationship with alcohol and talk to their health care provider about their drinking. Complete amnesia, often spanning hours, is known as an “en bloc” blackout. https://ecosoberhouse.com/ With this severe form of blackout, memories of events do not form and typically cannot be recovered. Patients being treated for alcoholism who have diabetes can be at ease at our facility, knowing that they’ll eat healthy, gourmet meals and also engage in activity therapies, like meditation and yoga.

Procedure and alcohol protocol

Timing may also be an issue, as hypoglycemia can strike hours after your last drink, especially if you’ve been exercising. Number of published journal articles or reviews that evaluate alcohol-induced blackouts per year (1985 to 2015). The graph represents published articles and reviews published in English and includes both animal and human studies with the terms “blackout” and “alcohol” in the title, abstract, and/or keyword. A comprehensive, systematic literature review was conducted to examine all articles published between January 2010 through August 2015 that focused on examined vulnerabilities, consequences, and possible mechanisms for alcohol-induced blackouts. Although quitting alcohol does not reverse diabetes, it does help – a lot.

  • In this article, we will discuss what causes blackouts and when to see a doctor.
  • They were then given a distractor task for 3 minutes (Sudoku puzzles), followed by a repeated test session (delayed recall condition).
  • Excessive amounts of alcohol can cause severe liver damage and disease, affecting its ability to work properly.
  • All participants reported sleeping, all were tested when sober, and testing took place later in the day allowing time for detoxification.

The primary analyses presented relate to the level of alcohol consumption recorded at the baseline study visit. An MBO occurs when a rapid rise in blood alcohol levels disrupts processing within the hippocampus [5]. The term fragmentary blackout describes the more commonly experienced type of MBO, where episodic memory is punctuated by brief periods of memory loss.

Publication types

Examining individuals after an MBO we found delayed recovery of memory (i.e., performance not returning to baseline levels) in serial recall and depth of encoding tasks, and variable recovery in the free recall task. Concerning the free recall task, group level statistics indicated no difference between before-alcohol and after-MBO conditions, however the data is variable and 43.5% of participants exhibited significantly poorer recall after-MBO. No evidence was found to suggest these blackout effects were impacted by a lack of sleep, in fact evidence from Bayes Factor Analysis favoured the null diabetes and alcohol blackouts hypothesis that a lack of sleep had no effect on recall performance after-MBO. Taken together, these findings suggest that, even when sober, alcohol-induced blackout episodes impart some lasting damage on memory processes. Perhaps the greatest impediment to rigorous tests of alcohol-induced blackouts and behavior is that researchers are not ethically permitted to provide alcohol in sufficient doses to cause a blackout to occur. BrACs of 20 g/dl and above are typically required to induce a blackout, thereby limiting the ability to safely dose research participants to the point of blackout.

In the depth of encoding study, control participants showed a greater drop in performance after alcohol, suggesting that they were more impaired by the presence of alcohol than the MBO group in both immediate and delayed recall. The depth manipulation presented target words in a contextual sentence, or narrative, while the shallow presentation simply asked for a visual recognition judgment (upper- or lower-case letters). After alcohol, both groups performed similarly in deep and shallow conditions however, before alcohol, more words were recalled from the deep context than the shallow. Alcohol is known to affect encoding [57] therefore some may consider a greater drop in performance for deeply encoded items, compared to shallow, following alcohol consumption to be surprising. It may be that deeply encoded items, said to have a stronger memory trace [58], would be more impervious to the effects of alcohol on free recall. However, it is also to be expected that at baseline deeply encoded items are recalled with greater frequency than shallow items, and therefore performance in this condition can fall further than the shallow condition after alcohol, as seems to be the case in the present experiment.

What are the risks of drinking with diabetes?

The combination of alcohol and diabetes can change the way the body processes glucose and can make someone more sensitive to their insulin. Depending on the amount and type of sugar in the drink, hyperglycemia (high glucose levels) can also occur as well. The experiment consisted of 4 blocks of 15 randomly presented words; block order was also randomised, and blocks were split evenly between shallow and deep encoding manipulations. All word stimuli were generated from the MRC Psycholinguistic Database [39, 40] and were 5–9 letters in length, contained 2–4 syllables, and had a familiarity rating of 300–600. A total of 180 stimuli were used in the experiment, split into six blocks of deep and six of shallow stimuli, with the use of each individual block counterbalanced across all participants. In the shallow encoding blocks, stimuli were presented in either lowercase or capital letters for 3000ms.

Six publications described consequences of alcohol-induced blackouts, and five studies explored potential cognitive and neurobiological mechanisms underlying alcohol-induced blackouts. Another 2015 study suggests that overconsuming sedatives could cause memory loss. In one case study, the excessive use of alprazolam (Xanax) led a 50-year-old woman to experience memory loss blackouts. The symptoms of intoxication and low blood sugar can be similar (slurred speech, dizziness, lack of coordination, or even a loss of consciousness), so it’s helpful to have someone in the group who understands the difference.

Practical and Clinical Implications of Alcohol-induced Blackouts

In fact, approximately 50% of college students who consume alcohol report having experienced an alcohol-induced blackout (Barnett et al., 2014; White et al., 2002). Therefore, this systematic review provides an update (2010–2015) on the clinical research focused on alcohol-induced blackouts, outlines practical and clinical implications, and provides recommendations for future research. With treatment, most people will be able to continue their daily activities.

  • Baseline differences between individuals who do and do not drink alcohol complicate, and potentially confound, all analyses of the cardiovascular impact of alcohol consumption.
  • More simply, after an alcohol-induced blackout, newly created memories might be less rich in detail.
  • (A, B) line graphs showing between control and MBO group mean accuracy (%) for freely recalled words in the depth of encoding task, both before and after ingesting alcohol.