Evaluation of Pharmacokinetic and Pharmacodynamic Drug–Drug Interaction of Sacubitril/Valsartan (LCZ696) and Sildenafil in Patients With Mild‐to‐Moderate Hypertension

Sacubitril/valsartan (LCZ696) is indicated for the treatment of patients with heart failure and reduced ejection fraction (HFrEF). Since patients with HFrEF may receive sacubitril/valsartan and sildenafil, both increasing cGMP, the present study evaluated the pharmacokinetic and pharmacodynamic drug interaction potential between sacubitril/valsartan and sildenafil. In this open-label, 3-period, single sequence study, patients with mild-to-moderate hypertension (153.8±8.2 mm Hg mean SBP) received a single dose of sildenafil 50 mg, sacubitril/valsartan 400 mg once daily for 5 days, and sacubitril/valsartan and sildenafil co-administration. When co-administered with sildenafil, the AUC and Cmax of valsartan decreased by 29% and 39%, respectively. Co-administration of sacubitril/valsartan and sildenafil resulted in a greater decrease in BP (-5/-4/-4 mm Hg mean ambulatory SBP/DBP/MAP) than with sacubitril/valsartan alone. Both treatments were generally safe and well tolerated in this study; however, the additional BP reduction suggests that sildenafil should be administered cautiously in patients receiving sacubitril/valsartan. This article is protected by copyright. All rights reserved.