Overdose may lead to severe and prolonged bradycrdia. In the event of bradycardia with poor hemodynamic tolerance, temporary cardiac pacing may be requied. Supportive treatment, including intravenous(IV)fluids, atropine and intravenous beta-stimulating agents such as isoproterenol,may be considered.
Corlanor is contraindicated in patients with:
Clinically significant adverse reactions that appear in other sections of the labeling include:
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.
In the Systolic Heart failure treatment with the If inhibitor ivabradine Trial (SHIFT), safety was evaluated in 3260 patients treated with Corlanor and 3278 patients given placebo. The median duration of Corlanor exposure was 21.5 months.
The most common adverse drug reactions in the SHIFT trial are shown in Table 2.
Table 2. Adverse Drug Reactions with Rates ≥ 1.0% Higher on Ivabradine than Placebo occurring in > 1% on Ivabradine in SHIFT
| Ivabradine N=3260 |
Placebo N=3278 |
|
| Bradycardia | 10% | 2.2% |
| Hypertension, blood pressure increased | 8.9% | 7.8% |
| Atrial fibrillation | 8.3% | 6.6% |
| Phosphenes, visual brightness | 2.8% | 0.5% |
Phosphenes are phenomena described as a transiently enhanced brightness in a limited area of the visual field, halos, image decomposition (stroboscopic or kaleidoscopic effects), colored bright lights, or multiple images (retinal persistency). Phosphenes are usually triggered by sudden variations in light intensity. Corlanor can cause phosphenes, thought to be mediated through Corlanor’s effects on retinal photoreceptors. Onset is generally within the first 2 months of treatment, after which they may occur repeatedly. Phosphenes were generally reported to be of mild to moderate intensity and led to treatment discontinuation in < 1% of patients; most resolved during or after treatment.
Postmarketing ExperienceBecause these reactions are reported voluntarily from a population of uncertain size, it is not always possible to estimate their frequency reliably or establish a causal relationship to drug exposure.
The following adverse reactions have been identified during post-approval use of Corlanor: syncope, hypotension, torsade de pointes, ventricular fibrillation, ventricular tachycardia, angioedema, erythema, rash, pruritus, urticaria, vertigo, diplopia, and visual impairment.
Corlanor is indicated to reduce the risk of hospitalization for worsening heart failure in patients with stable, symptomatic chronic heart failure with left ventricular ejection fraction ≤ 35%, who are in sinus rhythm with resting heart rate ≥ 70 beats per minute and either are on maximally tolerated doses of beta-blockers or have a contraindication to beta-blocker use.
Corlanor causes a dose-dependent reduction in heart rate. The size of the effect is dependent on the baseline heart rate (i.e., greater heart rate reduction occurs in subjects with higher baseline heart rate). At recommended doses, heart rate reduction is approximately 10 bpm at rest and during exercise. Analysis of heart rate reduction vs. dose indicates a plateau effect at doses > 20 mg twice daily. In a study of subjects with preexisting conduction system disease (first- or second-degree AV block or left or right bundle branch block) requiring electrophysiologic study, IV ivabradine (0.20 mg/kg) administration slowed the overall heart rate by approximately 15 bpm, increased the PR interval (29 msec), and increased the AH interval (27 msec).
Corlanor does not have negative inotropic effects. Ivabradine increases the uncorrected QT interval with heart rate slowing but does not cause rate-corrected prolongation of QT.
Following oral administration, peak plasma ivabradine concentrations are reached in approximately 1 hour under fasting conditions. The absolute oral bioavailability of ivabradine is approximately 40% because of first-pass elimination in the gut and liver.
Food delays absorption by approximately 1 hour and increases plasma exposure by 20% to 40%. Corlanor should be taken with meals.
Ivabradine is approximately 70% plasma protein bound, and the volume of distribution at steady state is approximately 100 L.
Metabolism And ExcretionThe pharmacokinetics of ivabradine are linear over an oral dose range of 0.5 mg to 24 mg. Ivabradine is extensively metabolized in the liver and intestines by CYP3A4-mediated oxidation. The major metabolite is the N-desmethylated derivative (S 18982), which is equipotent to ivabradine and circulates at concentrations approximately 40% that of ivabradine. The N-desmethylated derivative is also metabolized by CYP3A4. Ivabradine plasma levels decline with a distribution half-life of 2 hours and an effective half-life of approximately 6 hours.
The total clearance of ivabradine is 24 L/h, and renal clearance is approximately 4.2 L/h, with ~ 4% of an oral dose excreted unchanged in urine. The excretion of metabolites occurs to a similar extent via feces and urine.
Based on findings in animals, Corlanor may cause fetal harm when administered to a pregnant woman. There are no adequate and well-controlled studies of Corlanor in pregnant women to inform any drug-associated risks. In animal reproduction studies, oral administration of ivabradine to pregnant rats during organogenesis at a dosage providing 1 to 3 times the human exposure (AUC0-24hr) at the MRHD resulted in embryo-fetal toxicity and teratogenicity manifested as abnormal shape of the heart, interventricular septal defect, and complex anomalies of primary arteries. Increased postnatal mortality was associated with these teratogenic effects in rats. In pregnant rabbits, increased post-implantation loss was noted at an exposure (AUC0-24hr) 5 times the human exposure at the MRHD. Lower doses were not tested in rabbits. The background risk of major birth defects for the indicated population is unknown. The estimated background risk of major birth defects in the U.S. general population is 2 to 4%, however, and the estimated risk of miscarriage is 15 to 20% in clinically recognized pregnancies. Advise a pregnant woman of the potential risk to the fetus.
Clinical ConsiderationsDisease-Associated Maternal And/Or Embryo/Fetal Risk
Stroke volume and heart rate increase during pregnancy, increasing cardiac output, especially during the first trimester. Pregnant patients with left ventricular ejection fraction less than 35% on maximally tolerated doses of beta-blockers may be particularly heart-rate dependent for augmenting cardiac output. Therefore, pregnant patients who are started on Corlanor, especially during the first trimester, should be followed closely for destabilization of their congestive heart failure that could result from heart rate slowing.
Monitor pregnant women with chronic heart failure in 3rd trimester of pregnancy for preterm birth.
DataAnimal Data
In pregnant rats, oral administration of ivabradine during the period of organogenesis (gestation day 6-15) at doses of 2.3, 4.6, 9.3, or 19 mg/kg/day resulted in fetal toxicity and teratogenic effects. Increased intrauterine and post-natal mortality and cardiac malformations were observed at doses ≥ 2.3 mg/kg/day (equivalent to the human exposure at the MRHD based on AUC0-24hr). Teratogenic effects including interventricular septal defect and complex anomalies of major arteries were observed at doses ≥ 4.6 mg/kg/day (approximately 3 times the human exposure at the MRHD based on AUC0-24hr).
In pregnant rabbits, oral administration of ivabradine during the period of organogenesis (gestation day 618) at doses of 7, 14, or 28 mg/kg/day resulted in fetal toxicity and teratogenicity. Treatment with all doses ≥ 7 mg/kg/day (equivalent to the human exposure at the MRHD based on AUC0-24hr) caused an increase in post-implantation loss. At the high dose of 28 mg/kg/day (approximately 15 times the human exposure at the MRHD based on AUC0-24hr), reduced fetal and placental weights were observed, and evidence of teratogenicity (ectrodactylia observed in 2 of 148 fetuses from 2 of 18 litters) was demonstrated.
In the pre- and postnatal study, pregnant rats received oral administration of ivabradine at doses of 2.5, 7, or 20 mg/kg/day from gestation day 6 to lactation day 20. Increased postnatal mortality associated with cardiac teratogenic findings was observed in the F1 pups delivered by dams treated at the high dose (approximately 15 times the human exposure at the MRHD based on AUC0-24hr).
Corlanor 5 mg: salmon-colored, oval-shaped, film-coated tablet, scored on both edges, debossed with “5” on one face and bisected on the other face. The tablet is scored and can be divided into equal halves to provide a 2.5 mg dose.
Corlanor 7.5 mg: salmon-colored, triangular-shaped, film-coated tablet debossed with “7.5” on one face and plain on the other face.
Storage And HandlingCorlanor 5 mg tablets are formulated as salmon-colored, oval-shaped, film-coated tablets scored on both edges, marked with “5” on one face and bisected on the other face. They are supplied as follows:
Corlanor 7.5 mg tablets are formulated as salmon-colored, triangular-shaped, film-coated tablets debossed with “7.5” on one face and plain on the other face. They are supplied as follows:
Storage Store at 25°C (77°F); excursions permitted to 15° - 30°C (59° - 86°F).
Manufactured for: AMGEN Inc.One Amgen Center Drive.Thousand Oaks,Californnia 91320-1799. Revised: Jan 2017.
Included as part of the "PRECAUTIONS" Section
PRECAUTIONS Fetal ToxicityCorlanor may cause fetal toxicity when administered to a pregnant woman based on findings in animal studies. Embryo-fetal toxicity and cardiac teratogenic effects were observed in fetuses of pregnant rats treated during organogenesis at exposures 1 to 3 times the human exposures (AUC0-24hr) at the maximum recommended human dose (MRHD). Advise females to use effective contraception when taking Corlanor.
Atrial FibrillationCorlanor increases the risk of atrial fibrillation. In SHIFT, the rate of atrial fibrillation was 5.0% per patient-year in patients treated with Corlanor and 3.9% per patient-year in patients treated with placebo. Regularly monitor cardiac rhythm. Discontinue Corlanor if atrial fibrillation develops.
Bradycardia And Conduction DisturbancesBradycardia, sinus arrest, and heart block have occurred with Corlanor. The rate of bradycardia was 6.0% per patient-year in patients treated with Corlanor (2.7% symptomatic; 3.4% asymptomatic) and 1.3% per patient-year in patients treated with placebo. Risk factors for bradycardia include sinus node dysfunction, conduction defects (e.g., 1st or 2nd degree atrioventricular block, bundle branch block), ventricular dyssynchrony, and use of other negative chronotropes (e.g., digoxin, diltiazem, verapamil, amiodarone). Bradycardia may increase the risk of QT prolongation which may lead to severe ventricular arrhythmias,including torsade de pointes, especially in patients with risk factors such as use of QTc prolonging drugs.
Concurrent use of verapamil or diltiazem will increase Corlanor exposure, may themselves contribute to heart rate lowering, and should be avoided. Avoid use of Corlanor in patients with 2nd degree atrioventricular block, unless a functioning demand pacemaker is present.
Patient Counseling InformationAdvise the patient to read the FDA-approved patient labeling (Medication Guide).
Fetal ToxicityAdvise pregnant women of the potential risks to a fetus.
Advise females of reproductive potential to use effective contraception and to notify their healthcare provider with a known or suspected pregnency.
Low Heart RateAdvise patients to report significant decreases in heart rate or symptoms such as dizziness,fatigue,or hypotension.
Atrial fibrillationAdvise patients to report symptoms of atrial fibrillation, such as heart palpitations or racing,chest pressure,or worsened shortness of breath.
PhosphenesAdvise patient about possible occurrence of luminous phenomena(phosphenes).Advise patient to use caution if are driving or using machines in situations where sudden changes in light intensity may occure,especialy when driving at night.Advise patient that phosphenes may subside spontaneously during continued treatment with Corlanor.
Drug InteractionsAdvise patient to avoid ingestion of grapefruit juice and St.John's wort.
Intake With FoodAdvise patient to take Corlanor twice daily with meals.
Nonclinical Toxicology Carcinogenesis, Mutagenesis, Impairment Of FertilityThere was no evidence of carcinogenicity when mice and rats received ivabradine up to 104 weeks by dietary administration. High doses in these studies were associated with mean ivabradine exposures of at least 37 times higher than the human exposure (AUC0-24hr) at the MRHD.
Ivabradine tested negative in the following assays: bacterial reverse mutation (Ames) assay, in vivo bone marrow micronucleus assay in both mouse and rat, in vivo chromosomal aberration assay in rats, and in vivo unscheduled DNA synthesis assay in rats. Results of the in vitro chromosomal aberration assay were equivocal at concentrations approximately 1,500 times the human Cmax at the MRHD. Ivabradine tested positive in the mouse lymphoma assays and in vitro unscheduled DNA synthesis assay in rat hepatocytes at concentrations greater than 1,500 times the human Cmax at the MRHD.
Reproduction toxicity studies in animals demonstrated that ivabradine did not affect fertility in male or female rats at exposures 46 to 133 times the human exposure (AUC0-24hr) at the MRHD.
Use In Specific Populations Pregnancy Risk SummaryBased on findings in animals, Corlanor may cause fetal harm when administered to a pregnant woman. There are no adequate and well-controlled studies of Corlanor in pregnant women to inform any drug-associated risks. In animal reproduction studies, oral administration of ivabradine to pregnant rats during organogenesis at a dosage providing 1 to 3 times the human exposure (AUC0-24hr) at the MRHD resulted in embryo-fetal toxicity and teratogenicity manifested as abnormal shape of the heart, interventricular septal defect, and complex anomalies of primary arteries. Increased postnatal mortality was associated with these teratogenic effects in rats. In pregnant rabbits, increased post-implantation loss was noted at an exposure (AUC0-24hr) 5 times the human exposure at the MRHD. Lower doses were not tested in rabbits. The background risk of major birth defects for the indicated population is unknown. The estimated background risk of major birth defects in the U.S. general population is 2 to 4%, however, and the estimated risk of miscarriage is 15 to 20% in clinically recognized pregnancies. Advise a pregnant woman of the potential risk to the fetus.
Clinical ConsiderationsDisease-Associated Maternal And/Or Embryo/Fetal Risk
Stroke volume and heart rate increase during pregnancy, increasing cardiac output, especially during the first trimester. Pregnant patients with left ventricular ejection fraction less than 35% on maximally tolerated doses of beta-blockers may be particularly heart-rate dependent for augmenting cardiac output. Therefore, pregnant patients who are started on Corlanor, especially during the first trimester, should be followed closely for destabilization of their congestive heart failure that could result from heart rate slowing.
Monitor pregnant women with chronic heart failure in 3rd trimester of pregnancy for preterm birth.
DataAnimal Data
In pregnant rats, oral administration of ivabradine during the period of organogenesis (gestation day 6-15) at doses of 2.3, 4.6, 9.3, or 19 mg/kg/day resulted in fetal toxicity and teratogenic effects. Increased intrauterine and post-natal mortality and cardiac malformations were observed at doses ≥ 2.3 mg/kg/day (equivalent to the human exposure at the MRHD based on AUC0-24hr). Teratogenic effects including interventricular septal defect and complex anomalies of major arteries were observed at doses ≥ 4.6 mg/kg/day (approximately 3 times the human exposure at the MRHD based on AUC0-24hr).
In pregnant rabbits, oral administration of ivabradine during the period of organogenesis (gestation day 618) at doses of 7, 14, or 28 mg/kg/day resulted in fetal toxicity and teratogenicity. Treatment with all doses ≥ 7 mg/kg/day (equivalent to the human exposure at the MRHD based on AUC0-24hr) caused an increase in post-implantation loss. At the high dose of 28 mg/kg/day (approximately 15 times the human exposure at the MRHD based on AUC0-24hr), reduced fetal and placental weights were observed, and evidence of teratogenicity (ectrodactylia observed in 2 of 148 fetuses from 2 of 18 litters) was demonstrated.
In the pre- and postnatal study, pregnant rats received oral administration of ivabradine at doses of 2.5, 7, or 20 mg/kg/day from gestation day 6 to lactation day 20. Increased postnatal mortality associated with cardiac teratogenic findings was observed in the F1 pups delivered by dams treated at the high dose (approximately 15 times the human exposure at the MRHD based on AUC0-24hr).
Lactation Risk SummaryThere is no information regarding the presence of ivabradine in human milk, the effects of ivabradine on the breastfed infant, or the effects of the drug on milk production. Animal studies have shown, however,that ivabradine is present in rat milk [see Data]. Because of the potential risk to breastfed infants from exposure to Corlanor, breastfeeding is not recommended.
DataLactating rats received daily oral doses of [14C]-ivabradine (7 mg/kg) on post-parturition days 10 to 14; milk and maternal plasma were collected at 0.5 and 2.5 hours post-dose on day 14. The ratios of total radioactivity associated with [14C]-ivabradine or its metabolites in milk vs. plasma were 1.5 and 1.8, respectively, indicating that ivabradine is transferred to milk after oral administration.
Females And Males Of Reproductive Potential ContraceptionFemales
Corlanor may cause fetal harm, based on animal data. Advise females of reproductive potential to use effective contraception during Corlanor treatment.
Pediatric UseSafety and effectiveness in pediatric patients have not been established.
Geriatric UseNo pharmacokinetic differences have been observed in elderly (≥ 65 years) or very elderly (≥ 75 years) patients compared to the overall population. However, Corlanor has only been studied in a limited number of patients ≥ 75 years of age.
Hepatic ImpairmentNo dose adjustment is required in patients with mild or moderate hepatic impairment. Corlanor is contraindicated in patients with severe hepatic impairment (Child-Pugh C) as it has not been studied in this population and an increase in systemic exposure is anticipated.
Renal ImpairmentNo dosage adjustment is required for patients with creatinine clearance 15 to 60 mL/min. No data are available for patients with creatinine clearance below 15 mL/min.
The recommended starting dose of Corlanor is 5 mg twice daily with meals. Assess patient after two weeks and adjust dose to achieve a resting heart rate between 50 and 60 beats per minute (bpm) as shown in Table 1. Thereafter, adjust dose as needed based on resting heart rate and tolerability. The maximum dose is 7.5 mg twice daily.
In patients with a history of conduction defects, or other patients in whom bradycardia could lead to hemodynamic compromise, initiate therapy at 2.5 mg twice daily before increasing the dose based on heart rate.
Table 1. Dose Adjustment
| Heart Rate | Dose Adjustment |
| > 60 bpm | Increase dose by 2.5 mg (given twice daily) up to a maximum dose of 7.5 mg twice daily |
| 50-60 bpm | Maintain dose |
| < 50 bpm or signs and symptoms of bradycardia | Decrease dose by 2.5 mg (given twice daily); if current dose is 2.5 mg twice daily, discontinue therapy* |
| * |
The effects of coadministered drugs (CYP3A4 inhibitors, substrates, inducers, and other concomitantly administered drugs) on the pharmacokinetics of Corlanor were studied in several single- and multiple-dose studies. Pharmacokinetic measures indicating the magnitude of these interactions are presented in Figure 2.
Figure 2. Impact of Coadministered Drugs on the Pharmacokinetics of Corlanor
Digoxin exposure did not change when concomitantly administered with ivabradine. No dose adjustment is required when ivabradine is concomitantly administered with digoxin.
Effect of Ivabradine on Metformin PharmacokineticsIvabradine, dosed at 10 mg twice daily to steady state, did not affect the pharmacokinetics of metformin (an organic cation transporter [OCT2] sensitive substrate). The geometric mean (90% confidence interval [CI]) ratios of Cmax and AUCinf of metformin, with and without ivabradine were 0.98 [0.83–1.15] and 1.02 [0.86–1.22], respectively. No dose adjustment is required for metformin when administered with Corlanor.
