What is true is that some medications can cause confusion, memory problems, or cognitive impairment, especially in older adults. In some cases these effects improve when the medication is adjusted or stopped under medical supervision.
Medication groups that may affect memory or thinking
1. Anticholinergic medications
These can interfere with brain signaling and are associated with confusion and memory problems, particularly in older adults.
Examples:
- Diphenhydramine
- Oxybutynin
2. Benzodiazepines
Used for anxiety or insomnia.
Examples:
- Diazepam
- Lorazepam
They can cause sedation, confusion, and increase fall risk, especially in seniors.
3. Some sleep medications
Examples:
- Zolpidem
May impair memory and alertness, particularly with long-term use.
4. Opioid pain medications
Examples:
- Morphine
- Oxycodone
Can cause drowsiness and cognitive slowing.
5. Certain antidepressants
Some older antidepressants have anticholinergic effects that may affect cognition.
6. Some anti-seizure medications
Can sometimes cause cognitive slowing depending on the drug and dose.
7. Certain antipsychotic medications
May contribute to confusion or cognitive side effects in susceptible individuals.
8. Multiple medications used together
One of the biggest risks is polypharmacy (taking many medications simultaneously), which can increase confusion and memory problems.
Important distinction
- Temporary cognitive side effects ≠ dementia.
- Dementia is a long-term brain disorder, such as Alzheimer’s disease.
- A medication may worsen thinking or reveal an underlying problem without actually causing dementia.
What to do
If you or someone you know has new memory problems:
- Review all medications with a doctor or pharmacist.
- Do not stop prescription medications abruptly.
- Check for other causes such as sleep problems, depression, vitamin deficiencies, infections, or thyroid disorders.
The safest takeaway is not “avoid these 8 drugs,” but rather: have medications reviewed regularly, especially in older adults, because some can affect memory and thinking.
