Medicines called benzodiazepines are among the most commonly prescribed drugs for anxiety and sleep problems.
Millions of people around the world have used these medications to feel calmer, reduce panic, or fall asleep more easily. They work quickly, often within a short time after taking them, which is one reason they have remained popular for many decades.
Common benzodiazepines include diazepam, lorazepam, and alprazolam. Doctors often prescribe them for short periods during stressful events, severe anxiety, or temporary sleep difficulties. For many people, these medicines can be very helpful and provide quick relief when symptoms become overwhelming.
However, doctors have long been concerned about what may happen when these medicines are used for months or years.
Previous studies have suggested that long-term use of benzodiazepines may be linked to memory problems, confusion, and difficulties with thinking, particularly in older adults. Until recently, scientists did not fully understand why these problems might occur.
A new study from researchers at Ludwig Maximilian University of Munich has provided important clues. The study helps explain how long-term use of benzodiazepines may affect the brain and why some people who take these medicines for long periods develop memory difficulties.
To understand the findings, it is helpful to know a little about how the brain works. The human brain contains billions of nerve cells called neurons. These cells constantly communicate with one another through tiny junctions known as synapses.
Synapses are extremely important because they allow brain cells to pass information back and forth. Learning new skills, remembering experiences, solving problems, and making decisions all depend on healthy connections between these brain cells.
When synapses are strong and plentiful, the brain can process information efficiently. However, when these connections are lost, it may become harder to remember information, learn new things, or think clearly. Loss of synapses has also been linked to age-related memory decline and brain disorders that affect thinking and memory.
The researchers discovered that benzodiazepines may reduce the number of these important brain connections through their effects on a special group of cells called microglia. Microglia act as the brain’s cleaning and maintenance system.
They help protect the brain by removing damaged cells and clearing away debris. Under normal conditions, these cells play an essential role in keeping the brain healthy.
The study found that benzodiazepines attach to a protein called TSPO that is found on microglial cells. When this happens, the microglia can become overly active. Instead of removing only damaged material, they may begin removing healthy synapses as well. As more synapses disappear, communication between brain cells becomes weaker.
To investigate this process, the researchers performed experiments using mice. The animals received daily doses of diazepam, a commonly prescribed benzodiazepine, over several weeks. After treatment, the mice showed signs of memory difficulties.
When scientists examined their brains, they found that the treated mice had fewer synapses than mice that did not receive the drug. These findings supported the idea that long-term exposure to benzodiazepines can lead to a gradual loss of important brain connections.
The study provides a possible explanation for memory problems that have been observed in some people who take these medications over long periods.
The researchers also believe that the brain may have some ability to recover after the medicines are stopped, although much more research is needed to determine how much recovery is possible and how long it may take.
The findings are especially important for older adults. As people age, their brains naturally undergo changes that can make them more vulnerable to memory problems and conditions such as dementia. Long-term use of benzodiazepines could potentially add to these challenges by reducing the brain’s connections even further.
This does not mean that benzodiazepines should never be used. They remain valuable medicines and can provide important short-term relief for anxiety and sleep problems. However, the study highlights why doctors generally recommend using these medications carefully and for limited periods whenever possible.
Doctors may also consider other approaches for managing anxiety and sleep difficulties. These can include psychological therapies, relaxation techniques, regular exercise, good sleep habits, and other medications that may be more suitable for long-term treatment.
The new research improves scientists’ understanding of how benzodiazepines may affect the brain. It shows that even medications that provide important benefits can have hidden effects when used for extended periods.
As researchers continue studying these medicines, they hope to develop safer ways to treat anxiety and sleep problems while protecting brain health and reducing the risk of long-term memory difficulties.
The findings from this study were reported by researchers from Ludwig Maximilian University of Munich.
If you care about mental health, please read studies about how dairy foods may influence depression risk, and 6 foods you can eat to improve mental health.
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