Common Drugs That Can Cause Memory Loss: Are You Taking Them?

medication management, medications to avoid as you age, anticholinergic drugs

This article was updated January 24, 2020. 

 

Sure—getting older can lead to slower brain function and memory loss. But did you know many medications may be contributing to your forgetfulness, diminished brain function, and brain fog? Some of these drugs can also cause imbalance and lead to falls, making them even more dangerous. 

Common drugs that can cause memory loss

Although many drugs can cause or contribute to memory loss, the following are some of the worst offenders:

  1. Benzodiazepines. These drugs are commonly prescribed for anxiety. They’re also prescribed for dementia, muscle spasms, seizure prevention, and insomnia. Benzodiazepines cause memory loss by dampening chemical activity in the part of the brain that transfers short- and long-term memory. Examples: Xanax, Klonopin, Valium, and Ativan. 
  2. Statins. Statins are prescribed to lower high cholesterol, but a quarter of the body’s cholesterol is in the brain. When this cholesterol is diminished, it can lead to trouble processing information, learning, and recalling memories. A 2009 study published in Pharmacology reported that approximately 75 percent of patients who take these drugs reported memory loss. However, stopping the drugs under their doctor’s supervision usually led to complete memory remission, sometimes within days. Examples: Lipitor, Lescol, Crestor, and Zocor. 
  3. Narcotics. Narcotic painkillers, also called opioids, are prescribed for moderate to severe chronic pain. They work by slowing pain signals to the central nervous system and blunting emotional responses to pain. These drugs, however, are highly addictive–a quality which has led to a nationwide opioid epidemic and hundreds of thousands of deaths across the country. Patients and doctors are encouraged to discuss alternatives to pain management before resorting to opioids if possible. Examples: Fentanyl, Norco, Vicodin, Dilaudid, OxyContin, and Percocet. 
  4. Anticonvulsants. Antiseizure medications are also often prescribed off-label to treat bipolar disorder, mood disorders, mania, nerve pain, and can sometimes aid in weight loss. They reduce nerve signals in the central nervous system, which can cause memory loss over time. Examples: Tegretol, Neurontin, Lamictal, Lyrica, and Depakote. 
  5. Beta-blockers. If your blood pressure gets too high, your doctor might put you on a beta-blocker to slow your heart rate and lower your blood pressure. These drugs can also treat chest pain, tremors, and migraines. Beta-blockers “block” important chemicals (norepinephrine and epinephrine) on their way to the brain and can affect memory over time. Examples: Tenormin, Inderal, Betapace, and Timoptic. 

infographic showing drugs that can cause memory loss

The worst offender: anticholinergics

One type of drug that causes memory loss more often than most drugs is anticholinergic drugs. They work by blocking the action of the neurotransmitter, acetylcholine, in the brain. 

Anticholinergic drugs are most often used for urinary incontinence because they affect neurons which encourage muscle contraction, but they also influence learning capabilities and memory storage and retrieval. What makes them even more dangerous is that many over-the-counter (OTC) drugs are considered anticholinergics, like Benadryl, Nyquil, Tylenol PM, and more.

Warning: anticholinergic drugs are especially dangerous for seniors to take as seniors already have diminished neurons, and the old a person is, the longer drugs will stay in their body. The American Geriatrics Society strongly recommends against older Americans using anticholinergic drugs, as older adults are more likely to experience dangerous side effects. 

Side effects of anticholinergic drugs include:

  • Stroke
  • Blurred vision
  • Drowsiness
  • Dizziness
  • Dry mouth
  • Constipation
  • Urine retention
  • Hallucinations

Examples of anticholinergic drugs include darifenacin (Enablex), oxybutynin (Ditropan XL, Gelnique, Oxytrol), and more. Find a complete list of anticholinergic drugs here

Talk to your doctor

If you are on one of the medications that can cause memory loss or slow brain function, do not stop taking the medication without consulting your doctor. Doing so could be dangerous to your health. Ask your doctor if there are any alternatives available to protect your brain health. 


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