Previous medical history strongly contributes to the genesis of intracranial aneurysms (IA). A possible impact of regular medication on the occurrence of abdominal aortic aneurysms has been reported.

To evaluate the value of regular medication on the risk of development and rupture of IA.

Data on medication use and related comorbidities were obtained from the institutional IA registry. A 1:1 age- and sex-matched patient sample was collected from the population-based Heinz Nixdorf Recall Study with individuals from the same area.

In the analysis comparing IA cohort (n = 1960) with the matched normal population (n = 1960), the use of statins (adjusted odds ratio, 1.34 [95% confidence interval 1.02–1.78]), antidiabetics (1.46 [1.08–1.99]), and calcium channel blockers (1.49 [1.11–2.00]) was independently associated with higher risk of IA, whereas uricostatics (0.23 [0.14–0.38]), aspirin (0.23 [0.13–0.43]), beta-blockers (0.51 [0.40–0.66]), and angiotensin-converting enzyme inhibitors (0.38 [0.27–0.53]) were related to lower risk of IA. In the multivariable analysis within the IA cohort (n = 2446), SAH patients showed higher drug exposure with thiazide diuretics (2.11 [1.59–2.80]), but lower prevalence of remaining antihypertensive medication—beta-blockers (0.38 [0.30–0.48]), calcium channel blockers (0.63 [0.48–0.83]), angiotensin-converting enzyme inhibitors (0.56 [0.44–0.72]), and angiotensin-1 receptor blockers (0.33 [0.24–0.45]). Patients with ruptured IA were less likely to be treated with statins (0.62 [0.47–0.81]), thyroid hormones (0.62 [0.48–0.79]), and aspirin (0.55 [0.41–0.75]).

Regular medication might impact the risks related to the development and rupture of IA. Further clinical trials are required to clarify the effect of regular medication on IA genesis.