Interaction with antihypertensives, anticoagulants?
Other results from the study suggest a possible interaction between statin use and antihypertensive and anticoagulant drugs.
Data showed that the lower ICH risk was restricted to patients who received statins and antihypertensive drugs concurrently. Conversely, only patients who were not concurrently taking anticoagulants had a lower risk of ICH in association with statin use.
Dr. Gaist suggested that the lack of a reduction in ICH with statins among patients taking anticoagulants could be because the increased risk of ICH with anticoagulants was stronger than the reduced risk with statins.
Regarding the fact that the reduced risk of ICH with statins was only observed among individuals who were also taking antihypertensive medication, Dr. Gaist noted that because hypertension is such an important risk factor for ICH, “it may be that to get the true benefit of statins, patients have to have their hypertension controlled.”
However, an alternative explanation could that the finding is a result of “healthy adherer” bias, in which people who take antihypertensive medication and follow a healthy lifestyle as advised would be more likely to take statins.
“The observational nature of our study does not allow us to determine the extent to which associations are causal,” the authors say.
Dr. Gaist also noted that an important caveat in this study is that they focused on individuals who had had a first ICH.
“This data does not inform us about those who have already had an ICH and are taking statins. But we are planning to look at this in our next study,” he said.
The study was funded by the Novo Nordisk Foundation. Dr. Gaist has received speaker honorarium from Bristol-Myers Squibb and Pfizer unrelated to this work.
A version of this article first appeared on Medscape.com.