Study Finds Risperidone Linked to Higher Stroke Risk
A huge UK study looked at more than 165,000 people who have dementia. The researchers discovered that the medicine risperidone raises the chance of having a stroke, no matter who takes it.
What Is Risperidone?
Risperidone is a strong antipsychotic drug. Doctors often give it to people with dementia who become very angry or restless when other methods do not work. It is the only drug of its type that is officially allowed for dementia patients in the UK.
Why the Findings Matter
The study showed that even patients without a history of heart problems or previous strokes are more likely to suffer a stroke while taking risperidone. This challenges the idea that some groups might be safer than others.
How Doctors Use the Drug
About half of people living with dementia feel agitated. When talking, music, or other calming tricks fail, doctors may turn to risperidone as a last resort. Current NHS advice says the drug should be used for no more than six weeks, but many patients stay on it longer, and monitoring differs across regions.
Limited Alternatives
At the moment, there is no other licensed medicine in the UK for severe agitation in dementia. This forces doctors to weigh the calming benefits of risperidone against its stroke risk and explain both sides to patients and families.
Numbers From the Research
The team examined NHS health records from 2004 to 2023. They compared people with dementia who took risperidone to similar people who did not.
- Among those who had already had a stroke, the yearly stroke rate was 22.2 per 1,000 person‑years for risperidone users, versus 17.7 for non‑users.
- For patients with no previous stroke, the rates were 2.9 per 1,000 for users and 2.2 per 1,000 for non‑users.
- Short‑term use (up to 12 weeks) still showed a higher risk.
What Comes Next?
Experts say the new data should help create clearer, more personal guidelines. Doctors, patients, and families need honest talks about the benefits and dangers of risperidone so they can make the best decisions together.