Can Statin Medications Cause Memory Loss?

If you’re on a statin for lowering your cholesterol, you’re in good company. This group of prescription medications has become the treatment of choice for elevated cholesterol and serum lipid levels. These medications show very good potential for not only lowering lipid levels but also reducing the risk of a heart attack. Unfortunately, they can, in some cases, have significant side effects including liver toxicity and muscle pain. One area of recent interest in the medical community is how statin drugs affect memory. When it comes to the issue of statin medications and memory, should you be concerned?

Is There an Association?

In order for statin drugs to affect memory, these drugs must be able to cross the blood brain barrier and enter the central nervous system. These medications vary in their ability to do this. Simvastatin is the one that most easily crosses the barrier to enter the central nervous system, so it should be the one most likely to cause memory problems, while Pravastatin is the least likely since it can’t cross as readily.  

A Large Meta-Analysis

In a large analysis looking at how statin drugs affect memory which was published on Medscape, researchers found a variety of complaints of short term memory loss and confusion associated with use of statins. There were even some cases of amnesia reported by statin users. Fortunately, all memory loss reversed once the statin was stopped. The researchers were quick to add that no cause and effect could be determined from these reports of statin’s affect on memory.

Could They Actually Help Dementia?

Interestingly, statins have been investigated for their possible role in reducing the risk of Alzheimer’s disease. It’s been shown that people who are taking statins have a reduced number of cholesterol by-products that could contribute to Alzheimer’s disease. It’s also been shown at autopsy that elderly people taking statins had less evidence of Alzheimer’s disease than those who weren’t on cholesterol lowering medications. Although a recent study failed to confirm this association, there are further studies being conducted to more definitively determine statin’s affect on Alzheimer’s disease.

The Bottom Line?

There are isolated negative reports of statin’s affect on memory, but the memory problems appear to be reversed once the medication is stopped. If you’re taking a statin such as Simvastatin which can easily cross the blood brain barrier and you develop memory problems, you may want to ask your doctor to switch you to Pravastatin which is less likely to do this. It’s also important that older people who may be at higher risk of statin’s affect on memory be closely monitored. If you’re concerned about statin medications and memory problems, talk to your doctor about other alternatives for lowering your cholesterol level.