In this study, it did not have such an effect, and appeared to increase stroke risk.
The use of the drug reduces the stroke risk even further, doctors said.
She is likely to accept the very small increase in stroke risk to get a decent night's sleep.
Some concern has been raised about stroke risk in people taking niacin.
Uncontrolled high blood pressure increases a person's stroke risk by four to six times.
However, eating fish doesn't lower stroke risk in people who are already taking aspirin for prevention.
Uncontrolled high blood pressure and diabetes can increase stroke risk.
Studies suggest that vitamin B-12 does not help with stroke risk or lung cancer.
However, Pan says the use of antidepressants is not thought to be linked with stroke risk.
Previous research has not identified any stroke risk related to taking niacin.