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If you or a loved one are experiencing memory loss, it’s natural to worry about conditions like Alzheimer’s or dementia. But what many don’t realise is that certain medications can worsen memory — or even mimic the symptoms of cognitive decline.
At our clinic, we’ve seen a number of patients whose cognitive symptoms were actually caused by medications with what’s known as anticholinergic activity. In some cases, symptoms dramatically improved after those drugs were stopped.
How Medications Affect Memory: The Role of Acetylcholine
A vital brain chemical called acetylcholine is responsible for nerve communication, memory, and learning. But some medications block this chemical — leading to anticholinergic effects. Over time, this can disrupt brain function, causing memory problems, confusion, or slower thinking.
What Are Anticholinergic Medications?
Anticholinergic medications block acetylcholine. They’re commonly prescribed for conditions like:
- Overactive bladder (e.g. solifenacin, oxybutynin)
- Chronic pain and depression (e.g. amitriptyline)
- Allergies or nausea (e.g. diphenhydramine, cyclizine)
While they treat physical symptoms, these drugs can contribute to cognitive side effects, particularly in older adults.
What Is Anticholinergic Burden?
The anticholinergic burden is the combined effect of all anticholinergic drugs a person is taking. The higher the total burden, the higher the risk of:
- Short-term memory loss
- Confusion
- Increased risk of dementia
- Worsening of existing cognitive conditions
Clinicians use tools like the Anticholinergic Cognitive Burden (ACB) Scale to score and assess risk. Yet, in many routine appointments, this critical review is overlooked.
When Medications Work Against Memory Treatments
Here’s the paradox: drugs like donepezil and rivastigmine, commonly prescribed to improve symptoms of Alzheimer’s or Lewy body dementia, work by increasing acetylcholine. But if a patient is also taking an anticholinergic medication — such as solifenacin — it can counteract those very treatments, reducing their effectiveness.
In effect, one drug is trying to boost memory, while the other is quietly undoing the benefit.
What We See in Clinic
“At the Memory and Brain Clinic London, I’ve seen multiple patients present with memory complaints where medications like solifenacin were a key contributing factor.
In several cases, once we identified and safely stopped the anticholinergic medication, patients experienced a marked improvement in memory, clarity, and day-to-day functioning.
That’s why a thorough medication review is always part of our diagnostic clarity pathway.”
– Dr. Soumit Singhai, Consultant Cognitive & Geriatrician
Patients often arrive from other neurology memory clinics or psychiatry-led services, where the impact of medications on cognitive function has been missed or underestimated.
Why a Medication Review Matters
A comprehensive medication review is one of the most overlooked but most reversible interventions in memory care. It’s a key step in identifying and reducing medication-induced cognitive decline.
At our clinic, this review is part of every patient’s journey — helping us spot hidden causes and restore quality of life without overmedicating.
Frequently Asked Questions (FAQs)
1. Can medications really cause memory loss?
Yes. Many drugs, especially those with anticholinergic effects, can impact memory by reducing acetylcholine levels in the brain.
2. What is solifenacin, and how does it affect memory?
Solifenacin is used for overactive bladder but has strong anticholinergic activity. It has been associated with confusion, memory impairment, and cognitive slowing, especially in older adults.
3. How do I know if my medication is anticholinergic?
Ask your GP or specialist for a medication review using the Anticholinergic Cognitive Burden Scale. This tool scores your medications based on their cognitive risk.
4. What are signs my medication might be affecting my brain?
Common signs include:
- Short-term memory issues
- Difficulty concentrating
- Slower thinking or word-finding problems
- Sudden confusion
5. What should I do if I suspect my medication is the problem?
Never stop medication suddenly. Speak with your GP or a cognitive specialist about whether a safer alternative exists and whether a full cognitive medication review is appropriate.
6. Can memory improve after stopping these medications?
Yes. Many patients experience clear improvements in cognitive function after reducing their anticholinergic burden, especially when combined with tailored cognitive support.
7. Are over-the-counter drugs also a concern?
Yes — antihistamines like diphenhydramine (e.g., Nytol or Benadryl) and some sleep aids also have anticholinergic effects and should be used with caution in those with memory concerns.
Conclusion: Don’t Overlook the Impact of Medication on Memory
Medications can quietly impair brain function — even those prescribed for unrelated conditions. If you or someone you care for is experiencing cognitive changes, consider whether medication-induced memory loss could be part of the picture.
A thorough medication review could be the key to clearer thinking, better memory, and improved quality of life — and it is a standard part of the assessment pathways we offer at the Memory and Brain Clinic London.
Have Questions?
We’re here to help.
Call us: 0207 062 7248
Email: drsinghaisecretary@outlook.com
