What Is Betmiga Used For?

Betmiga contains mirabegron, which helps treat the uncomfortable symptoms of an overactive bladder by reducing bladder muscle activity.

Primary Uses

Betmiga treats overactive bladder symptoms including: suddenly needing to empty your bladder (urgency), having to empty your bladder more than usual (increased urinary frequency), and not being able to control when you empty your bladder (urgency incontinence).

How It Works

Betmiga works by reducing the activity of an overactive bladder. It targets beta 3-adrenoceptors to help control bladder contractions that happen too often or cannot be controlled.

How to Take Betmiga

Take Betmiga exactly as prescribed by your doctor. The medication comes as tablets that should be swallowed whole with water.

Dosage Instructions

The usual starting dose is 25 mg once daily. Your doctor may increase this to 50 mg once daily based on how you respond and tolerate the medication. The maximum dose is 50 mg once daily. Swallow the tablet whole with a full glass of water – do not crush or chew it. You can take it with or without food. Take it at about the same time each day to help you remember.

What If You Miss a Dose?

If it’s 6 hours or less before your next dose, skip the missed dose and take your next dose at the regular time. Otherwise, take it as soon as you remember and then return to your normal schedule. Never take a double dose to make up for a missed one.

Available Tablet Strengths

Side Effects

Like all medications, this medicine can cause side effects. Most are mild and temporary, but some require medical attention.

Common Side Effects

These side effects occur relatively frequently and usually don’t require emergency care:

• indigestion
• common cold symptoms
• headache
• dizziness
• nausea or vomiting
• fatigue
• constipation
• stomach, back or joint pain
• urinary tract infection
• vaginal discharge, itching or burning
• increased blood pressure
• increase in liver enzymes

Important Warnings

Before taking Betmiga, make sure your doctor knows about all your medical conditions and medications.

Who Should Not Take Betmiga

Do not take Betmiga if you are allergic to mirabegron or any ingredients in the medication, or if you have very high blood pressure (systolic 180 mmHg or higher and/or diastolic 110 mmHg or higher).

Medical Conditions to Discuss

Tell your doctor if you have: kidney problems, liver problems, high blood pressure, heart disorders (including irregular heartbeat or QT interval prolongation), or trouble emptying your bladder or weak urine stream.

Pregnancy and Breastfeeding

Tell your doctor if you are pregnant, planning to become pregnant, or breastfeeding. Your doctor can discuss the risks and benefits with you. If you become pregnant while taking Betmiga, tell your doctor immediately.

Drug Interactions

Several medications can interact with Betmiga, affecting how well it works or increasing side effects.

• thioridazine (mental illness medication)
• propafenone or flecainide (heart rhythm medications)
• metoprolol (blood pressure/heart medication)
• imipramine or desipramine (depression medications)
• antifungal medicines (itraconazole, ketoconazole)
• ritonavir (HIV/AIDS medication)
• digoxin (heart failure/rhythm medication)
• overactive bladder medications (solifenacin, tolterodine, oxybutynin, darifenacin, trospium, fesoterodine)
• enlarged prostate medications (tamsulosin)
• QT interval prolonging medicines (quinidine, sotalol, amiodarone, mesoridazine, haloperidol, erythromycin, clarithromycin)

Alcohol & Driving

Be cautious with activities requiring alertness until you know how Betmiga affects you.

Alcohol

Tell your doctor if you drink alcohol.

Driving and Operating Machinery

There’s no specific information suggesting Betmiga affects your ability to drive or use machinery. However, be careful until you know how it affects you, as it may cause dizziness in some people. If dizziness occurs, do not drive or use machinery.

Storage

Keep tablets in their original pack until it’s time to take them. Store in a cool, dry place where temperature stays below 30°C. Don’t store in the bathroom, near a sink, on a window sill, or in a car. Keep out of reach of children – a locked cupboard at least 1.5 meters above ground is ideal.

Overdose Information

If you think you’ve taken too much Betmiga, seek urgent medical attention immediately. Call the Poisons Information Centre (13 11 26), contact your doctor, or go to the nearest hospital emergency department, even if you feel fine. Taking too much may cause a fast heart rate.

Frequently Asked Questions