7 Medications That Can Affect Memory and Thinking
Some medications can cause confusion, drowsiness, memory problems, or other cognitive side effects, particularly in older adults or when several medications are taken together. However, it is misleading to say that these medicines directly cause “severe dementia and profound brain damage” in everyone who uses them. Some effects are temporary and may improve when the medication is changed under medical supervision.
1. Benzodiazepines
Medicines such as lorazepam, diazepam, and alprazolam can cause sedation, slowed thinking, confusion, and memory difficulties. Older adults are generally more sensitive to these effects.
2. First-Generation Antihistamines
Some older allergy and sleep medicines have strong anticholinergic effects. They can cause drowsiness, confusion, and difficulty concentrating, especially in older people.
3. Certain Bladder-Control Medicines
Some medications used for overactive bladder can have anticholinergic effects that contribute to dry mouth, constipation, confusion, and cognitive difficulties in susceptible people.
4. Certain Antidepressants With Anticholinergic Effects
Some older antidepressants can interfere with acetylcholine, a chemical involved in memory and learning. They may cause confusion or problems with concentration, particularly at higher doses.
5. Certain Antipsychotic Medicines
Antipsychotics can cause sedation, slowed movement, and cognitive changes. They are sometimes prescribed for specific psychiatric or neurological conditions, so they should not be stopped suddenly without medical advice.
6. Some Anti-Seizure Medicines
Certain anticonvulsants can cause sleepiness, dizziness, difficulty concentrating, or memory problems. The effects vary considerably between medications and individuals.
7. Opioid Pain Medicines
Strong opioid medications can cause drowsiness, confusion, and impaired attention. These effects can be more pronounced in older adults or when opioids are combined with other sedating medicines.
Important: Don’t Stop a Medication Suddenly
A medication causing confusion or memory problems does not necessarily mean it has caused permanent brain damage or dementia. The symptoms can sometimes result from the dose, drug interactions, dehydration, infection, or another medical problem.
If someone develops new or rapidly worsening confusion, unusual sleepiness, hallucinations, or major changes in memory, they should be medically evaluated. Never stop a prescribed medication abruptly without speaking with the prescriber, because some medicines require gradual dose reduction.
