6.1Clinical Trials Experience
Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in practice. A total of 6,622 heart failure patients were treated with ENTRESTO in the PARADIGM-HF (vs. enalapril) and PARAGON-HF (vs. valsartan) clinical trials. Of these, 5,085 were exposed for at least 1 year.
Adult Heart Failure In PARADIGM-HF, patients were required to complete sequential enalapril and ENTRESTO run-in periods of (median) 15 and 29 days, respectively, prior to entering the randomized double-blind period comparing ENTRESTO and enalapril. During the enalapril run-in period, 1,102 patients (10.5%) were permanently discontinued from the study, 5.6% because of an adverse event, most commonly renal dysfunction (1.7%), hyperkalemia (1.7%) and hypotension (1.4%).
During the ENTRESTO run-in period, an additional 10.4% of patients permanently discontinued treatment, 5.9% because of an adverse event, most commonly renal dysfunction (1.8%), hypotension (1.7%) and hyperkalemia (1.3%). Because of this run-in design, the adverse reaction rates described below are lower than expected in practice. In the double-blind period, safety was evaluated in 4,203 patients treated with ENTRESTO and 4,229 treated with enalapril.
In PARADIGM-HF, patients randomized to ENTRESTO received treatment for up to 4.3 years, with a median duration of exposure of 24 months; 3,271 patients were treated for more than one year. Discontinuation of therapy because of an adverse event during the double-blind period occurred in 450 (10.7%) of ENTRESTO treated patients and 516 (12.2%) of patients receiving enalapril. Adverse reactions occurring at an incidence of ≥ 5% in patients who were treated with ENTRESTO in the double-blind period of PARADIGM-HF are shown in Table 2.
In PARADIGM-HF, the incidence of angioedema was 0.1% in both the enalapril and ENTRESTO run-in periods. In the double-blind period, the incidence of angioedema was higher in patients treated with ENTRESTO than enalapril (0.5% and 0.2%, respectively). The incidence of angioedema in Black patients was 2.4% with ENTRESTO and 0.5% with enalapril [see Warnings and Precautions (5.2)] . Orthostasis was reported in 2.1% of patients treated with ENTRESTO compared to 1.1% of patients treated with enalapril during the double-blind period of PARADIGM-HF.
Falls were reported in 1.9% of patients treated with ENTRESTO compared to 1.3% of patients treated with enalapril. Table 2: Adverse Reactions Reported in ≥ 5% of Patients Treated with ENTRESTO in the Double-Blind Period of PARADIGM-HF ENTRESTO (n = 4,203) % Enalapril (n = 4,229) % Hypotension 18 12 Hyperkalemia 12 14 Cough 9 13 Dizziness 6 5 Renal failure/acute renal failure 5 5 In PARAGON-HF, no new adverse reactions were identified.
Pediatric Heart Failure The adverse reactions observed in pediatric patients 1 to < 18 years old who received treatment with ENTRESTO were consistent with those observed in adult patients. Laboratory Abnormalities Hemoglobin and Hematocrit Decreases in hemoglobin/hematocrit of > 20% were observed in approximately 5% of both ENTRESTO- and enalapril-treated patients in the double-blind period in PARADIGM-HF. Decreases in hemoglobin/hematocrit of >20% were observed in approximately 7% of ENTRESTO-treated patients and 9% of valsartan-treated patients in the double-blind period in PARAGON-HF.
Serum Creatinine During the double-blind period in PARADIGM-HF, approximately 16% of both ENTRESTO- and enalapril-treated patients had increases in serum creatinine of > 50%. During the double-blind period in PARAGON-HF, approximately 17% of ENTRESTO-treated patients and 21% of valsartan-treated patients had increases in serum creatinine of > 50%. Serum Potassium During the double-blind period of PARADIGM-HF, approximately 16% of both ENTRESTO- and enalapril-treated patients had potassium concentrations > 5.5 mEq/L.
During the double-blind period of PARAGON-HF, approximately 18% of ENTRESTO-treated patients and 20% of valsartan-treated patients had potassium concentrations > 5.5 mEq/L.