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Vericiguat is a soluble guanylate cyclase stimulator indicated to reduce the risk of cardiovascular death and heart failure (HF) hospitalization in adults with symptomatic chronic HF and ejection fraction less than 45%. Guidelines recommend short-acting nitrates, such as sublingual nitroglycerin, for the treatment of acute angina pectoris in patients with chronic coronary syndromes (CCSs), common comorbidities in HF. We evaluated safety, tolerability, and the pharmacodynamic interaction between vericiguat and nitroglycerin, coadministered in patients with CCSs. In this phase Ib, double-blind, randomized, multicenter study, 36 patients with CCSs received either vericiguat 2.5 mg (up-titrated every 2 weeks to 5 mg and 10 mg) or placebo. Patients also received nitroglycerin (0.4 mg sublingual). In total, 31 patients completed the study (vericiguat + nitroglycerin, n = 21; placebo + nitroglycerin, n = 10). There was no increase in treatment-emergent adverse events (TEAEs) with vericiguat + nitroglycerin vs. placebo + nitroglycerin; three patients discontinued due to TEAEs (vericiguat + nitroglycerin, n = 1; placebo + nitroglycerin, n = 2). Decreases in mean blood pressure (BP; 6-10 mmHg systolic BP (SBP); 4-6 mmHg diastolic BP (DBP)) were independent of vericiguat exposure and occurred to a similar extent at trough and peak concentrations with all vericiguat doses and placebo. Coadministration of vericiguat with nitroglycerin in patients with CCSs was well tolerated, and the combination is unlikely to cause significant adverse effects beyond those known for nitroglycerin.The magnitude of the global burden of heart failure (HF) is significant. As well as being a growing economic problem, 1 clinical outcomes for patients with chronic HF remain poor, despite the availability of HF therapies and the implementation of current guidelines. 2

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