Fesoterodine fumarate | Side Effects, Dosage, & More
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Generic Name:

fesoterodine, Oral tablet

All Brands

  • Toviaz
SECTION 1 of 5

Highlights for fesoterodine

Oral tablet
1

Fesoterodine is an oral drug that’s used to treat symptoms caused by overactive bladder (OAB).

2

Fesoterodine is available as the brand-name drug called Toviaz. It’s also available as a generic drug.

3

The standard starting dose is 4 mg taken by mouth once per day. If this doesn’t control your symptoms, your doctor may increase your dose to 8 mg taken one time per day.

4

Common side effects include dry mouth, constipation, dry eyes, and trouble emptying your bladder.

5

This drug may cause blurred vision, dizziness, or drowsiness. Don’t drive, use machinery, or do other tasks that require alertness until you know how this drug affects you.

IMPORTANT INFORMATION

Other conditions

You shouldn’t take this drug if you’re unable to empty your bladder (urinary retention), you have delayed or slowed emptying of your stomach (gastric retention), or you have uncontrolled narrow-angle glaucoma.

Drowsiness warning

This drug may cause blurred vision, dizziness, and drowsiness. Don’t drive, operate machinery, or do other dangerous activities until you know how this drug affects you. Drinking alcohol can make drowsiness worse. Limit how much alcohol you drink while you’re on this medication.

Drug features

Fesoterodine is a prescription drug. It’s available as an oral extended-release tablet.

Fesoterodine is available as the brand-name drug called Toviaz. It’s also available as a generic drug. Generic drugs usually cost less. In some cases, they may not be available in every strength or form as the brand-name version. 

Why it's used

This drug is used to treat symptoms caused by overactive bladder (OAB), including:

  • urge urinary incontinence: leaking or wetting accidents due to a strong need to urinate
  • urinary urgency: a strong need to urinate right away
  • urinary frequency: urinating more often than normal

How it works

This drug belongs to a class of drugs called muscarinic antagonists. A class of drugs refers to medications that work similarly. They have a similar chemical structure and are often used to treat similar conditions.

Overactive bladder is a condition where your bladder muscles contract involuntarily even when your bladder isn’t full.

More Details

How it works

This drug belongs to a class of drugs called muscarinic antagonists. A class of drugs refers to medications that work similarly. They have a similar chemical structure and are often used to treat similar conditions.

Overactive bladder is a condition where your bladder muscles contract involuntarily even when your bladder isn’t full. When they contract, you’ll feel the need to urinate right away. This drug helps decrease and prevent these involuntary bladder contractions or spasms. This then decreases your sudden need to urinate, having to urinate often, and leaking in between bathroom visits.

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fesoterodine Side Effects

Oral tablet

Most Common Side Effects

The most common side effects that occur with fesoterodine include

  • dry mouth

  • constipation

  • dry eyes

If these effects are mild, they may go away within a few days or a couple of weeks. If they’re more severe or don’t go away, talk to your doctor or pharmacist.

Serious Side Effects

If you experience any of these serious side effects, call your doctor right away. If your symptoms are potentially life threatening, or if you think you’re experiencing a medical emergency, call 9-1-1.

  • heat exhaustion. Fesoterodine may cause decreased sweating. Heat exhaustion can occur when you take this drug in a hot environment. Symptoms may include:

    • cool, moist skin with goose bumps when you’re in a hot area
    • sweating heavily
    • feeling faint
    • dizziness
    • tiredness
    • faster heart rate
    • muscle cramps
    • nausea
    • headache
  • trouble emptying your bladder (urinary retention). Symptoms may include:

    • inability to urinate
    • painful urge to urinate
    • pain in the lower part of your stomach
    • bloating
  • serious allergic reaction. Symptoms may include:

    • hives, skin rash, or swelling
    • severe itching
    • swelling of your face, mouth, or tongue
    • trouble breathing
Pharmacist's Advice
Healthline Pharmacist Editorial Team

This drug may cause blurred vision, dizziness, and drowsiness. Don’t drive, use machinery, or do other tasks that require alertness until you know how this drug affects you.

Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs affect each person differently, we cannot guarantee that this information includes all possible side effects. This information is not a substitute for medical advice. Always discuss possible side effects with a healthcare provider who knows your medical history.
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fesoterodine May Interact with Other Medications

Oral tablet

This drug can interact with other medications, herbs, or vitamins you might be taking. That’s why your doctor should manage all of your medications carefully. If you’re curious about how this drug might interact with something else you’re taking, talk to your doctor or pharmacist.

Note: You can reduce your chances of drug interactions by having all of your prescriptions filled at the same pharmacy. That way, a pharmacist can check for possible drug interactions.

Alcohol interaction

Limit how much alcohol you drink while you’re on fesoterodine. Drinking alcohol can make drowsiness worse.

Medications that might interact with this drug

Other bladder disorder drugs
  • darifenacin
  • flavoxate
  • oxybutynin
  • solifenacin
  • tolterodine
  • trospium

Taking these drugs with fesoterodine may increase your side effects, such as dry mouth, constipation, trouble emptying your bladder, blurred vision, and drowsiness.

Antifungals
  • ketoconazole
  • itraconazole

These drugs may increase the levels of fesoterodine in your body. This means that you may have more side effects. If you’re on one of these medications, you shouldn’t take more than 4 mg of fesoterodine.

Antibiotic
  • clarithromycin

This drug may increase the levels of fesoterodine in your body. This means that you may have more side effects. If you’re on this medication, you shouldn’t take more than 4 mg of fesoterodine.

Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs interact differently in each person, we cannot guarantee that this information includes all possible interactions. This information is not a substitute for medical advice. Always speak with your healthcare provider about possible interactions with all prescription drugs, vitamins, herbs and supplements, and over-the-counter drugs that you are taking.
Drug warnings
bladder outflow obstruction
People with bladder outflow obstruction

If you have trouble emptying your bladder or if you have a weak urine stream (urinary retention), this drug may make your condition worse. You shouldn’t take this drug if you have urinary retention.

slow emptying of stomach
People with slowed emptying of the stomach

If you have any stomach or intestinal problems, or problems with constipation, this drug may make your condition worse. You shouldn’t take this drug if you have gastric retention.

narrow-angle glaucoma
People narrow-angle glaucoma

If you have an eye problem called narrow-angle glaucoma, this drug may make your condition worse. You shouldn’t take this drug if you have uncontrolled glaucoma.

myasthenia gravis
People with myasthenia gravis

This drug may make your muscle movements even weaker if you have this condition.

liver disease
People with liver disease

This drug is processed by your liver. If you have liver problems, more of the drug may stay in your body longer, putting you at risk for side effects. If your liver problems are severe, you shouldn’t take this drug.

kidney disease
People with kidney disease

This drug is removed from your body by your kidneys. If your kidneys aren’t working well, more of the drug can stay in your body longer and put you at risk for side effects. If your kidney problems are severe, you shouldn’t take more than 4mg per day.

pregnant women
Pregnant women

This drug is a category C pregnancy drug. That means two things:

  1. Research in animals has shown adverse effects to the fetus when the mother takes the drug.
  2. There haven’t been enough studies done in humans to be certain how the drug might affect the fetus.

Tell your doctor if you’re pregnant or plan to become pregnant. This drug should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus.

breastfeeding
Women who are breast-feeding

It isn’t known if this drug passes through breast milk. This drug may decrease the amount of milk you can make if you’re breastfeeding.

You and your doctor may need to decide if you’ll take this drug or breastfeed.

for seniors
For seniors

People aged 75 years or older may be more likely to have side effects with this drug, including:

  • dry mouth
  • constipation
  • indigestion or stomach pain
  • dizziness
  • urinary retention
  • urinary tract infection
for children
For children

The safety and effectiveness of this drug in children younger than 18 years old haven’t been established.

call doctor
When to call the doctor

Call your doctor if your symptoms of overactive bladder don’t improve or become worse.

allergies
Allergies

This drug may cause a serious allergic reaction. Symptoms include:

  • swelling of your face, mouth, or tongue
  • trouble breathing

Don't take this drug again if you've ever had an allergic reaction to it. Taking it again could be fatal.

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How to Take fesoterodine (Dosage)

Oral tablet

All possible dosages and forms may not be included here. Your dose, form, and how often you take it will depend on:

  • Your age
  • The condition being treated
  • How severe your condition is
  • Other medical conditions you have
  • How you react to the first dose

What are you taking this medication for?

Overactive bladder

Brand: Toviaz

Form: Oral extended-release tablet
Strengths: 4 mg and 8 mg

Generic: fesoterodine fumarate

Form: Oral extended-release tablet
Strengths: 4 mg and 8 mg
Adult dosage (ages 18-64 years)

The starting dose is 4 mg taken by mouth one time per day. If this doesn’t control your symptoms, your doctor may increase your dose to 8 mg taken once per day.

Child dosage (ages 0-17 years)

This medicine hasn’t been studied in children and shouldn’t be used in children younger than 18 years old.

Senior dosage (ages 65 years and older)

Older adults may process this drug more slowly. A normal adult dose may cause levels of this drug to be higher than normal.

Special considerations

Kidney disease: If you have severe kidney disease, your dose shouldn’t be more than 4 mg per day.

Disclaimer: Our goal is to provide you with the most relevant and current information. However, because drugs affect each person differently, we cannot guarantee that this list includes all possible dosages. This information is not a substitute for medical advice. Always to speak with your doctor or pharmacist about dosages that are right for you.
Pharmacist's Advice
Healthline Pharmacist Editorial Team

This drug comes with serious risks if you don’t take it as prescribed.

If you don't take it at all or skip doses

If you don’t take this drug as prescribed by your doctor, your overactive bladder symptoms may get worse. You may have a strong need to urinate, with leaking or wetting accidents, or a need to urinate more often.

If you take too much

You may have the following symptoms:

  • feeling of warmth and reddening of your face (flushing)
  • a very fast heart rate
  • being unable to urinate 
  • extreme sleepiness
  • severe confusion
  • hallucinations

If you think that you’ve taken too much of this drug, call your doctor or go to the emergency room right away.

What to do if you miss a dose

If you a miss a dose of this drug, skip that dose and take it as scheduled the next day.

Don’t take two doses of this drug in the same day. This can cause toxic side effects.

How to tell if the drug is working

You can tell if this drug is working if your symptoms of overactive bladder improve. You may no longer have a strong need to urinate or a need to urinate more often.

This drug is used for long-term treatment.

Important considerations for taking this drug

Store fesoterodine at room temperature

Keep it from 68–77°F (20–25°C).

Keep the bottle closed tightly.

Keep it away from high temperature.

Keep your drugs away from areas where they could get wet, such as bathrooms. Store this drug away from moisture and damp locations.

A prescription for this medication is refillable

You should not need a new prescription for this medication to be refilled. Your doctor will write the number of refills authorized on your prescription.

Travel

When traveling with your medication:

  • Always carry your medication with you or in your carry-on bag.
  • Don’t worry about airport X-ray machines. They can’t hurt this medication.
  • You may need to show your pharmacy’s label to clearly identify the medication. Keep the original prescription label with you when traveling.
  • Don’t leave this medicine in the car, especially when the temperature is hot or freezing.

Clinical monitoring

Your doctor will do the following blood tests to decide if fesoterodine is safe for you to start or if you need a lower dose:

  • liver function
  • kidney function

Insurance

Many insurance companies will require a prior authorization before they approve the prescription and pay for fesoterodine.

Are there any alternatives?

There are other drugs available to treat your condition. Some may be more suitable for you than others. Talk to your doctor about possible alternatives.

What does the pill look like?

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How Much Does fesoterodine Cost?

Oral tablet

We've partnered with GoodRx so you can compare prices, find discounts and save up to 80% on your next prescription. Check out the low coupon prices below — no insurance required.

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Lowest price for fesoterodine

Kroger Pharmacy $255.55
Membership warehouse $256.40
Target (CVS) $261.85
These prices represent the lowest priced national pharmacies for fesoterodine on GoodRx. They may be lower than your insurance.

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These prices represent the lowest priced national pharmacies for fesoterodine on GoodRx. They may be lower than your insurance.

Content developed in collaboration with University of Illinois-Chicago, Drug Information Group

Medically reviewed by Creighton University, Center for Drug Information and Evidence-Based Practice on January 21, 2016

Disclaimer: Healthline has made every effort to make certain that all information is factually correct, comprehensive, and up-to-date. However, this article should not be used as a substitute for the knowledge and expertise of a licensed healthcare professional. You should always consult your doctor or other healthcare professional before taking any medication. The drug information contained herein is subject to change and is not intended to cover all possible uses, directions, precautions, warnings, drug interactions, allergic reactions, or adverse effects. The absence of warnings or other information for a given drug does not indicate that the drug or drug combination is safe, effective, or appropriate for all patients or all specific uses.
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