Alert! 8 Medications That Can Affect Memory and Thinking
Some medications can cause confusion, drowsiness, slowed thinking, or memory difficulties, particularly in older adults. However, it is misleading to say that these medicines automatically cause “serious dementia.” Medication-related cognitive problems can have different causes and may sometimes improve after a doctor adjusts the treatment.
1. Benzodiazepines
Medicines such as diazepam, lorazepam, and alprazolam can cause sedation, confusion, and short-term memory problems. Older adults may be particularly sensitive to these effects.
2. Strong Anticholinergic Medicines
Some medications for allergies, bladder problems, nausea, and other conditions have anticholinergic effects. A high overall anticholinergic burden can contribute to confusion and cognitive problems.
3. Certain Sleep Medicines
Some prescription sleep medications can cause next-day drowsiness, impaired concentration, confusion, or unusual behaviors. These effects may be more pronounced in older adults.
4. Opioid Pain Medicines
Opioids can cause sleepiness, dizziness, and confusion. The risk of significant sedation can increase when opioids are combined with other medicines that depress the nervous system.
5. Certain Antidepressants
Some antidepressants, particularly those with stronger anticholinergic properties, can cause dry mouth, drowsiness, confusion, or difficulty concentrating in susceptible individuals.
6. Corticosteroids
Medicines such as prednisone can sometimes cause insomnia, mood changes, agitation, confusion, or other changes in thinking, especially at higher doses.
7. Some Anti-Seizure Medicines
Certain anticonvulsants can cause sleepiness, dizziness, slowed thinking, or concentration difficulties. The effects vary considerably depending on the specific medication and dose.
8. Some Bladder-Control Medicines
Certain medications used for overactive bladder have anticholinergic effects and can cause dry mouth, constipation, confusion, or memory difficulties, particularly in older adults.
Don’t Stop Medication on Your Own
If you notice new confusion, memory problems, unusual sleepiness, or changes in thinking after starting or increasing a medication, tell your doctor or pharmacist. They can review the medication, dose, interactions, and other possible causes.
Some medicines—especially benzodiazepines, opioids, and corticosteroids—may require careful dose changes rather than sudden discontinuation.
Bottom line: Some medications can contribute to cognitive symptoms, but that does not mean they inevitably cause dementia or permanent brain damage. A complete medication review can help determine whether a drug is contributing to memory or thinking problems.
