Myrbetriq (Mirabegron)

(℞) Prescription Required - Myrbetriq is also marketed as Betmiga internationally

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    Myrbetriq (Mirabegron) Dosage and Side Effects

    MYRBETRIQ contains mirabegron. It works by relaxing the bladder smooth muscle, thereby reducing the symptoms of an overactive bladder. MYRBETRIQ treats the symptoms of an overactive bladder such as:

    • suddenly needing to empty your bladder (called urgency)

    • having to empty your bladder more than usual (called urinary frequency)

    • not being able to control when you empty your bladder (called urgency incontinence)

    Proper Use of this medication

    Usual starting dose:

    25 mg once daily with or without food. The tablet should be swallowed whole with a glass of water. Do not crush or chew the tablet. Based upon your response and tolerability, your doctor may increase your dose to 50 mg once daily. The maximum dose for MYRBETRIQ is 50 mg once daily.


    In case of drug overdose, contact your doctor, or a poison control centre, or go to emergency room of the hospital near you immediately, even if there are no symptoms.

    Missed dose:

    If you forget to take your medicine, then take your next dose at the normal time. Do not take a double dose to make up for a forgotten dose. If you miss several doses, tell your doctor and follow the advice given to you.

    Warnings and Precautions

    BEFORE you use MYRBETRIQ talk to your doctor or pharmacist if:

    • you have problems emptying your bladder or if you have weak urine stream

    • you are pregnant or trying to become pregnant

    • you are breastfeeding or planning to breastfeed

    • you have severe liver problems

    • you have severe kidney problems

    • you have an eye problem called Glaucoma

    • you have high blood pressure or a history of high blood pressure

    • you have any heart disorder, including an irregular heartbeat, an abnormal electrical signal called “prolongation of the QT interval” or a known history of QT interval prolongation

    • you have a history of ischemic heart disease or a heart rate that is higher than normal

    MYRBETRIQ should not be given to patients under 18 years of age.

    Side Effects

    As with all medications, MYRBETRIQ can cause side effects. The possible common side effects are as follows:

    • Increased blood pressure

    • Cold symptoms (Nasopharyngitis)

    • Urinary tract infection

    • Constipation

    • Diarrhea

    • Dizziness

    • Headache

    • Nausea

    • Itching

    For any unexpected effects while taking MYRBETRIQ, contact your doctor or pharmacist.

    Interactions with this medication

    Tell your doctor about all the medicines you take, including prescription and nonprescription medicines, vitamins, and herbal supplements. MYRBETRIQ may affect the way other medicines work, and other medicines may affect how MYRBETRIQ works. You may need to change the dosage or stop taking one of the medicines.

    MYRBETRIQ may interact with the following medications:

    • Propafenone, or Flecainide, drugs used to treat irregular heartbeats

    • Digoxin

    • Drugs known to increase the heartbeat or elevate blood pressure

    • Drugs known to prolong the QT/QTc interval and/or cause torsade de pointes

    The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.