Common back-pain drug may be linked to higher dementia risk, large study finds

This pattern adds weight to the concern, as it suggests the association isn’t simply a coincidence or a reflection of pre-existing health issues.

Does Gabapentin Actually Cause Dementia?
This is the critical question, and the researchers are careful to be clear: this study does not prove that gabapentin directly causes dementia.

The research was observational in nature, which means it identifies a statistical association between gabapentin use and cognitive outcomes — not a definitive causal relationship. There are important limitations to acknowledge. The study was unable to analyze specific dosage levels or the exact duration of use for individual participants. Additionally, other factors that weren’t captured in the data could potentially influence the results.

However, the size of the dataset is significant. Analyzing records from tens of thousands of patients across dozens of health systems provides a broad and diverse picture, and the consistency of the findings across different age groups and prescription levels is difficult to dismiss.

The researchers themselves noted that the findings “indicate an association between gabapentin prescription and dementia or cognitive impairment within 10 years” — and given how widely the drug is used, they argue that this warrants serious attention from the medical community.

Understanding Why Gabapentin Is So Widely Prescribed
Dementia risk rises if you live with chronic pain, study says | CNN

To appreciate the significance of this study, it helps to understand just how prevalent gabapentin use has become in the United States. Originally developed in the early 1990s and approved by the FDA primarily to treat epilepsy, gabapentin has since been embraced by physicians across a wide range of specialties as a go-to option for chronic pain management.

It is commonly prescribed for nerve-related pain conditions, post-shingles discomfort, restless legs syndrome, and — most relevantly — chronic lower back pain. Its popularity surged in part as a response to the opioid crisis. As doctors and regulators worked to reduce reliance on opioid-based pain medications, gabapentin emerged as a widely accepted alternative, viewed as carrying fewer serious risks.

Today, it is one of the most frequently prescribed medications in the country, with tens of millions of prescriptions written annually. Many patients take it continuously over months or even years to manage ongoing pain — exactly the pattern that the new study found to be most closely linked with elevated cognitive risk.