Some dementia symptoms are just caused by a bad mix of common drugs, and they’re actually completely reversible.
April 2, 2026
Original Paper
Reversibility of Cognitive Effects Associated with Concomitant Gabapentin and Dihydropyridine Calcium Channel Blocker Use
medRxiv · 10.64898/2026.03.30.26349787
The Takeaway
Combining the nerve pain drug gabapentin with certain blood pressure medications can mimic the cognitive decline of dementia. Researchers discovered these effects are not permanent brain damage but are fully reversible upon stopping the drugs, suggesting many 'dementia' cases might actually be misdiagnosed drug interactions.
From the abstract
Background: Gabapentin prescriptions have increased 123% since 2010, reaching 59 million annually and 15.5 million patients. Recent evidence indicates that concomitant use of gabapentin and dihydropyridine calcium channel blockers (DHP-CCBs) amplifies dementia risk through a dual neuronal calcium signaling blockade mechanism. Whether these cognitive effects are reversible upon discontinuation, and whether the combination accelerates decline in patients with established dementia, remains unknown.