Why is this medication prescribed?
Mirabegron is used to treat overactive bladder (a condition in which the bladder muscles contract uncontrollably and cause frequent urination, urgent need to urinate, and inability to control urination). Mirabegron is in a class of medications called beta-3 adrenergic agonists. It works by relaxing the bladder muscles to prevent urgent, frequent, or uncontrolled urination.
How should this medicine be used?
Mirabegron comes as an extended-release (long-acting) tablet to take by mouth. It is usually taken with or without food once a day. Take mirabegron at around the same time every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take mirabegron exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
Swallow the extend-release tablets whole with water; do not split, chew, or crush them.
Your doctor may increase your dose, depending on how well your symptoms are controlled and the side effects you experience. Talk to your doctor about how you are feeling during your treatment with mirabegron.
Mirabegron controls the symptoms of overactive bladder but does not cure the condition. It may take 8 weeks or longer before you feel the full benefit of mirabegron. Continue to take mirabegron even if you feel well. Do not stop taking mirabegron without talking to your doctor.
Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient.
Other uses for this medicine
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
What special precautions should I follow?
Before taking mirabegron,
- tell your doctor and pharmacist if you are allergic to mirabegron, any other medications, or any of the ingredients in mirabegron extended-release tablets. Ask your pharmacist or check the patient information for a list of the ingredients.
- tell your doctor and pharmacist what prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: anticoagulants ('blood thinners) such as warfarin (Coumadin); desipramine (Norpramin); digoxin (Lanoxin); flecainide (Tambocor); other medications for overactive bladder such as darifenacin (Enablex), fesoterodine (Toviaz), oxybutynin (Anturol, Ditropan, Glenique, Oxytrol), solifenacin (VESIcare), tolterodine (Detrol), and trospium (Sanctura); propafenone (Rhythmol); metoprolol (Toprol); and thioridazine. Your doctor may need to change the doses of your medications or monitor you carefully for side effects.
- tell your doctor if you have or have ever had bladder outlet obstruction (a blockage at the base of the bladder that stops urine from flowing freely out of the bladder and causes difficulty emptying the bladder and/or a weak urine stream), high blood pressure, or kidney or liver disease.
tell your doctor if you are pregnant, plan to become pregnant, or are breast-feeding. If you become pregnant while taking mirabegron, call your doctor.
- you should know that your blood pressure may increase during your treatment with mirabegron. Your doctor will check your blood pressure regularly during your treatment.
What special dietary instructions should I follow?
Unless your doctor tells you otherwise, continue your normal diet.
What should I do if I forget a dose?
Skip the missed dose and continue your regular dosing schedule. Do not take more than one dose in one day and do not take a double dose to make up for a missed one.
What side effects can this medication cause?
Mirabegron may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
- diffiicult, painful, urgent, or frequent urination
- stomach pain
- dry mouth
Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately or get emergency medical treatment:
- fast heartbeat
- difficulty emptying the bladder
- weak urine stream
Mirabegron may cause other side effects. Call your doctor if you have any unusual problems while taking this medication.
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).
What should I know about storage and disposal of this medication?
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.
In case of emergency/overdose
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
Symptoms of overdose may include:
- fast or pounding heartbeat
What other information should I know?
Keep all appointments with your doctor.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.
It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.