Mirabegron extended-release tablets are a beta-3 adrenergic agonist indicated for the treatment of: Overactive bladder (OAB) in adult patients with symptoms of urge urinary incontinence, urgency, and urinary frequency. ( 1.1 ) Neurogenic detrusor overactivity (NDO) in pediatric patients aged 3 years and older and weighing 35 kg or more. ( 1.2 )
Mirabegron extended-release tablets are indicated for the treatment of OAB in adult patients with symptoms of urge urinary incontinence, urgency, and urinary frequency.
Mirabegron extended-release tablets are indicated for the treatment of NDO in pediatric patients aged 3 years and older and weighing 35 kg or more.
Contraindications
Mirabegron extended-release tablets are contraindicated in patients with known hypersensitivity reactions to mirabegron or any inactive ingredients of the tablet [see Adverse Reactions ( 6.1 , 6.2 )]. Hypersensitivity to mirabegron or any inactive ingredients. ( 4 )
Warnings and precautions
Increases in Blood Pressure: Can increase blood pressure in adult or pediatric patients. Periodically monitor blood pressure, especially in hypertensive patients. Mirabegron extended-release tablets are not recommended in patients with severe uncontrolled hypertension. ( 5.1 ) Urinary Retention in Patients with Bladder Outlet Obstruction and in Patients Taking Muscarinic Antagonist Drugs for Overactive Bladder: Administer with caution in these patients because of risk of urinary retention.
( 5.2 ) Angioedema: Angioedema of the face, lips, tongue and/or larynx has been reported with mirabegron. ( 5.3 , 6.2 )
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Name two or more medicines and Osler runs an interaction check. A severe interaction is stated at the very top of the answer.
5.1Increases in Blood Pressure Increases in Blood Pressure in Adults
Mirabegron can increase blood pressure. Periodic blood pressure determinations are recommended, especially in hypertensive patients. Mirabegron is not recommended for use in patients with severe uncontrolled hypertension (defined as systolic blood pressure greater than or equal to 180 mm Hg and/or diastolic blood pressure greater than or equal to 110 mm Hg) [see Clinical Pharmacology ( 12.2 )] . In two, randomized, placebo-controlled, healthy adult volunteer studies, mirabegron was associated with dose-related increases in supine blood pressure.
In these studies, at the maximum recommended dose of 50 mg, the mean maximum increase in systolic/diastolic blood pressure was approximately 3.5/1.5 mm Hg greater than placebo. In contrast, in adult OAB patients in clinical trials, mirabegron, taken as monotherapy, the mean increase in systolic and diastolic blood pressure at the maximum recommended mirabegron dose of 50 mg was approximately 0.5 to 1 mm Hg greater than placebo.
Worsening of pre-existing hypertension was reported infrequently in patients taking mirabegron. Increases in Blood Pressure in Pediatric Patients 3 Years and Older Mirabegron can increase blood pressure in pediatric patients. Blood pressure increases may be larger in children (3 to less than 12 years of age) than in adolescents (12 to less than 18 years of age). Periodic blood pressure determinations are recommended.
Mirabegron is not recommended for use in pediatric patients with severe uncontrolled hypertension, defined as a systolic and/or diastolic blood pressure above the 99 th percentile plus 5 mm Hg for age, sex, and stature using appropriate reference values [see Adverse Reactions (6.1) ] .
5.2 Urinary Retention in Patients with Bladder Outlet Obstruction and in Patients Taking Muscarinic Antagonist Medications for OAB In patients taking mirabegron, urinary retention has been reported to occur in patients with bladder outlet obstruction (BOO) and in patients taking muscarinic antagonist medications for the treatment of OAB. A controlled clinical safety study in patients with BOO did not demonstrate increased urinary retention in patients treated with mirabegron; however, mirabegron should still be administered with caution to patients with clinically significant BOO.
For example, monitor these patients for signs and symptoms of urinary retention. Mirabegron should also be administered with caution to patients taking muscarinic antagonist medications for the treatment of OAB [see Clinical Pharmacology ( 12.2 )] .
5.3 Angioedema Angioedema of the face, lips, tongue, and/or larynx has been reported with mirabegron. In some cases, angioedema occurred after the first dose, however, cases have been reported to occur hours after the first dose or after multiple doses. Angioedema, associated with upper airway swelling, may be life-threatening. If involvement of the tongue, hypopharynx, or larynx occurs, promptly discontinue mirabegron and provide appropriate therapy and/or measures necessary to ensure a patent airway [see Adverse Reactions ( 6.2 )].
5.4Patients Taking Drugs Metabolized by CYP2D6
Since mirabegron is a moderate CYP2D6 inhibitor, the systemic exposure to CYP2D6 substrates is increased when coadministered with mirabegron. Therefore, appropriate monitoring and dose adjustment may be necessary, especially with narrow therapeutic index drugs metabolized by CYP2D6 [see Drug Interactions ( 7.1 ) and Clinical Pharmacology ( 12.3 )] .
Interactions
Drug interaction studies were conducted in adult patients to investigate the effect of coadministered drugs on the pharmacokinetics of mirabegron and the effect of mirabegron on the pharmacokinetics of coadministered drugs (e.g., ketoconazole, rifampin, solifenacin succinate, tamsulosin, and oral contraceptives) [see Clinical Pharmacology ( 12.3 )] . No dose adjustment is recommended when these drugs are coadministered with mirabegron.
The following are drug interactions for which monitoring is recommended: Drugs Metabolized by CYP2D6: Mirabegron is a CYP2D6 inhibitor and, when used concomitantly with drugs metabolized by CYP2D6, especially narrow therapeutic index drugs, appropriate monitoring and possible dose adjustment of those drugs may be necessary. ( 5.4 , 7.1 , 12.3 ) Digoxin: When initiating a combination of mirabegron and digoxin, use the lowest dose of digoxin; monitor serum digoxin concentrations to titrate digoxin dose to desired clinical effect.
( 7.2 , 12.3 )
7.1Drugs Metabolized by CYP2D6
Since mirabegron is a moderate CYP2D6 inhibitor, the systemic exposure of drugs metabolized by CYP2D6 enzyme is increased when coadministered with mirabegron. Therefore, appropriate monitoring and dose adjustment may be necessary when mirabegron is coadministered with these drugs, especially with narrow therapeutic index CYP2D6 substrates [see Warnings and Precautions ( 5.4 ) and Clinical Pharmacology ( 12.3 )] .
7.2Digoxin
When given in combination, 100 mg mirabegron increased mean digoxin C max from 1.01 ng/mL to 1.3 ng/mL (29%) and AUC from 16.7 ng.h/mL to 19.3 ng.h/mL (27%). For patients who are initiating a combination of mirabegron and digoxin, the lowest dose for digoxin should initially be considered. Serum digoxin concentrations should be monitored and used for titration of the digoxin dose to obtain the desired clinical effect [see Clinical Pharmacology ( 12.3 )] .
7.3Warfarin
The mean C max of S- and R- warfarin was increased by approximately 4% and AUC by approximately 9% when administered as a single dose of 25 mg after multiple doses of 100 mg mirabegron. Following a single dose administration of 25 mg warfarin, mirabegron had no effect on the warfarin pharmacodynamic endpoints such as International Normalized Ratio (INR) and prothrombin time. However, the effect of mirabegron on multiple doses of warfarin and on warfarin pharmacodynamic end points such as INR and prothrombin time has not been fully investigated [see Clinical Pharmacology ( 12.3 )] .
Pregnancy and breastfeeding
8.1Pregnancy Risk Summary
There are no studies with the use of mirabegron in pregnant women or adolescents to inform a drug-associated risk of major birth defects, miscarriages, or adverse maternal or fetal outcomes. Mirabegron administration to pregnant animals during organogenesis resulted in reversible skeletal variations (in rats) at 22-fold (via AUC) the maximum recommended human dose (MRHD) of 50 mg/day and decreased fetal body weights (in rabbits) at 14-fold the MRHD.
At maternally-toxic exposures in rats (96-fold), decreased fetal weight and increased fetal mortality were observed and, in rabbits (36-fold), cardiac findings (fetal cardiomegaly and fetal dilated aortae) were observed [see Data]. The estimated background risks of major birth defects and miscarriage for the indicated populations are unknown. In the U.S. general population, the estimated background risks of major birth defects or miscarriage in clinically recognized pregnancies are 2% to 4% and 15% to 20%, respectively.
Data Animal Data No embryo-fetal lethality or morphological fetal developmental abnormalities were produced in pregnant rats following daily oral administration of mirabegron during the period of organogenesis (Days 7 to 17 of gestation) at 0, 10, 30, 100, or 300 mg/kg, doses which were associated with systemic exposures (AUC) 0, 1, 6, 22, and 96-fold the MRHD. Skeletal variations (wavy ribs, delayed ossification) were observed in fetuses at doses 22-fold the systemic exposure at the MRHD and were reversible during development.
Exposures 96-fold the MRHD were maternally-toxic (mortality, decreased body weight gain) and associated with fetal growth reduction. Pregnant rabbits were treated with daily oral doses of mirabegron at 0, 3, 10, or 30 mg/kg/day during the period of organogenesis (Days 6 to 20 of gestation), which resulted in plasma exposures that were 0, 1, 14, or 36-fold the MRHD based on AUC. At 10 mg/kg/day (14-fold the MRHD) and higher, fetal body weights were reduced.
At 30 mg/kg/day, maternal toxicity (increased heart rate, mortality, reduced body weight gain, reduced food consumption) occurred, and fetal deaths, fetal cardiomegaly and fetal dilated aortae were observed at systemic exposure levels (AUC) 36-fold the MRHD. In a pre-and postnatal developmental study, rats were treated with daily oral doses of mirabegron at 0, 10, 30, or 100 mg/kg/day (0, 1, 6, or 22-fold the MRHD) from day 7 of gestation until day 20 after birth.
Decreased maternal body weight was observed along with decreased pup survival in the first few days after birth (92.7% survival) compared to the control group (98.8% survival), at 100 mg/kg/day (22-fold the MRHD). Pup body weight gain was reduced until postnatal day 7 but not further affected throughout the remainder of the lactation period. In utero and lactational exposure did not affect developmental milestones, behavior or fertility of offspring.
No effects were observed at 30 mg/kg/day.
Adverse reactions
The following adverse reactions are discussed in more detail in other sections of the labeling. Hypertension [see Warnings and Precautions ( 5.1 )] Urinary Retention [see Warnings and Precautions ( 5.2 )] Angioedema [see Warnings and Precautions ( 5.3 )] Most commonly reported adverse reactions with mirabegron monotherapy in adult patients with OAB (> 2% and > placebo) were hypertension, nasopharyngitis, urinary tract infection, and headache.
( 6.1 ) Most commonly reported adverse reactions with mirabegron in pediatric patients with NDO (≥ 3%) were UTI, nasopharyngitis, constipation, and headache. (6.1) To report SUSPECTED ADVERSE REACTIONS, contact Zydus Pharmaceuticals (USA) Inc. at 1-877-993-8779 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
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 clinical practice. Mirabegron Monotherapy for Adult OAB In three, 12-week, double-blind, placebo-controlled, safety and efficacy studies in patients with OAB (Studies 1, 2, and 3), mirabegron was evaluated for safety in 2,736 patients [see Clinical Studies ( 14.1 )].
Study 1 also included an active control. For the combined Studies 1, 2, and 3,432 patients received mirabegron 25 mg, 1,375 received mirabegron 50 mg, and 929 received mirabegron 100 mg once daily. In these studies, the majority of the patients were Caucasian (94%), and female (72%) with a mean age of 59 years (range 18 to 95 years). Mirabegron was also evaluated for safety in 1,632 patients who received mirabegron 50 mg once daily (n=812 patients) or mirabegron 100 mg (n=820 patients) in a 1-year, randomized, fixed- dose, double-blind, active-controlled, safety study in patients with OAB (Study 4).
Of these patients, 731 received mirabegron in a previous 12-week study. In Study 4, 1385 patients received mirabegron continuously for at least 6 months, 1,311 patients received mirabegron for at least 9 months, and 564 patients received mirabegron for at least 1 year. The most frequent adverse events (0.2%) leading to discontinuation in Studies 1, 2 and 3 for the 25 mg or 50 mg dose were nausea, headache, hypertension, diarrhea, constipation, dizziness, and tachycardia.
Atrial fibrillation (0.2%) and prostate cancer (0.1%) were reported as serious adverse events by more than 1 patient and at a rate greater than placebo. Table 3 the lists adverse reactions, derived from all adverse events that were reported in Studies 1, 2 and 3 at an incidence greater than placebo and in 1% or more of patients treated with mirabegron 25 mg or 50 mg once daily for up to 12 weeks. The most commonly reported adverse reactions (greater than 2% of mirabegron patients and greater than placebo) were hypertension, nasopharyngitis, urinary tract infection, and headache.
Table 3: Percentages of Patients with Adverse Reactions, Derived from All Adverse Events, Exceeding Placebo Rate and Reported in ≥ 1% of OAB Patients Treated with mirabegron 25 mg or 50 mg Once Daily in Studies 1, 2, and 3 Adverse Reaction Placebo (%) Mirabegron 25 mg (%) Mirabegron 50 mg (%) Number of Patients 1380 432 1375 Hypertension * 7.6 11.3
7.5 Nasopharyngitis 2.5 3.5
3.9 Urinary Tract Infection 1.8 4.2
2.9 Headache 3.0 2.1
3.2 Constipation 1.4 1.6
1.6 Upper Respiratory Tract Infection 1.7 2.1
1.5 Arthralgia 1.1 1.6
1.3 Diarrhea 1.3 1.2
1.5 Tachycardia 0.6 1.6
1.2 Abdominal Pain 0.7 1.4
0.6Fatigue 1.0 1.4
1.2 * Includes reports of blood pressure above the normal range, and BP increased from baseline, occurring predominantly in subjects with baseline hypertension. Other adverse reactions reported by less than 1% of patients treated with mirabegron in Studies 1, 2, or 3 included: Cardiac disorders: palpitations, blood pressure increased [see Clinical Pharmacology ( 12.2 )] Eye disorders: glaucoma [see Clinical Pharmacology ( 12.2 )] Gastrointestinal disorders: dyspepsia, gastritis, abdominal distension Infections and Infestations: sinusitis, rhinitis Investigations: GGT increased, AST increased, ALT increased, LDH increased Renal and urinary disorders: nephrolithiasis, bladder pain Reproductive system and breast disorders: vulvovaginal pruritus, vaginal infection Skin and subcutaneous tissue disorders: urticaria, leukocytoclastic vasculitis, rash, pruritus, purpura, lip edema Table 4 lists the rates of the most commonly reported adverse reactions, derived from all adverse events in patients treated with mirabegron 50 mg for up to 52 weeks in Study 4.
The most commonly reported adverse reactions (>3% of mirabegron patients) were hypertension, urinary tract infection, headache, and nasopharyngitis. Table 4: Percentages of Patients with Adverse Reactions, Derived from All Adverse Events, Reported in >2% of OAB Patients Treated with mirabegron 50 mg Once Daily in Study 4 Adverse Reaction Mirabegron 50 mg (%) Active Control (%) Number of Patients 812 812 Hypertension 9.2
9.6 Urinary Tract Infection 5.9
6.4 Headache 4.1
2.5 Nasopharyngitis 3.9
3.1 Back Pain 2.8
1.6 Constipation 2.8
2.7 Dry Mouth 2.8
8.6 Dizziness 2.7
2.6 Sinusitis 2.7
1.5 Influenza 2.6
3.4 Arthralgia 2.1
2.0 Cystitis 2.1
2.3In Study 4,
in patients treated with mirabegron 50 mg once daily, adverse reactions leading to discontinuation reported by more than 2 patients and at a rate greater than active control included: constipation (0.9%), headache (0.6%), dizziness (0.5%), hypertension (0.5%), dry eyes (0.4%), nausea (0.4%), vision blurred (0.4%), and urinary tract infection (0.4%). Serious adverse events reported by at least 2 patients and exceeding active control included cerebrovascular accident (0.4%) and osteoarthritis (0.2%).
Serum ALT/AST increased from baseline by greater than 10-fold in 2 patients (0.3%) taking mirabegron 50 mg; and these markers subsequently returned to baseline while both patients continued mirabegron. In Study 4, serious adverse events of neoplasm were reported by 0.1%, 1.3%, and 0.5% of patients treated with mirabegron 50 mg, mirabegron 100 mg and active control once daily, respectively. Neoplasms reported by 2 patients treated with mirabegron 100 mg included breast cancer, lung neoplasm malignant and prostate cancer.
A causal relationship between mirabegron and these reported neoplasms has not been established. In a separate clinical study in Japan, a single case was reported as Stevens-Johnson syndrome with increased serum ALT, AST, and bilirubin in a patient taking mirabegron 100 mg as well as an herbal medication (Kyufu Gold). Mirabegron for Pediatric Neurogenic Detrusor Overactivity (NDO) The safety of mirabegron was evaluated in a 52-week, open-label, baseline-controlled, multicenter, dose titration study (Study 9) [see Clinical Studies (14.3)] .
The study included 86 pediatric patients 3 to 17 years of age with neurogenic detrusor overactivity (NDO); 55% were female, 72% were White. Treatment was initiated at the weight-based starting recommended dose and was increased to a dose equivalent of mirabegron 50 mg daily dose in adults by Week 8. Subsequent to the dose titration period, patients continued their optimized dose for the duration of the 52-week study (mean exposure duration 303 days, range 1 to 390 days).
The most commonly reported adverse reactions were UTI, nasopharyngitis, constipation, and headache. Table 5 lists the adverse reactions that were reported in 2% or more of patients treated with mirabegron in Study 9. Table 5: Percentages of Patients with Adverse Reactions Reported in ≥ 2% of Patients 3 to 17 Years of Age with Neurogenic Detrusor Overactivity (NDO) Treated with Mirabegron in Study 9 Adverse Reaction Percentage (%) of Patients Reporting Adverse Reactions N=86 N umber of Patients 51 (59.3) Urinary Tract Infection 1
24.4 Nasopharyngitis
5.8 Constipation
4.7 Headache
3.5 Nausea
2.3 G
Our copy of this section ends here. The full text is in the official label at the FDA. Open Drugs@FDA
Composition
Active ingredients
MIRABEGRON 50MG
Strengths and forms
The FDA lists each strength of a product separately; these pages share one label.
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