This article describes furosemide oral tablet’s dosages and strengths and gives details on how to take it. You’ll also find information on cost savings and coupon options for furosemide.

If you want to know more about furosemide oral tablet, see this overview article. It covers details about the drug’s uses and side effects, ways to save on cost, and more.

Furosemide oral tablet is a generic version of the brand-name drug Lasix. Furosemide also comes in injectable forms and other oral forms, but those forms aren’t described in this article. To learn more about those forms, talk with your doctor.

Boxed warning: Risk of fluid loss and electrolyte loss

Furosemide has a boxed warning about the risk of fluid loss and electrolyte loss. A boxed warning is the most serious warning from the Food and Drug Administration (FDA).

See the end of this article for more information about this warning.

Form and strengths of furosemide

Furosemide oral tablet comes as follows:

Form: oral tablet that you swallow
Strengths: 20 milligrams (mg), 40 mg, 80 mg

Dosage of furosemide

This article describes the recommended dosages of furosemide oral tablet. The drugmaker provides these dosages.

If your doctor prescribes this medication, you should follow the dosage they prescribe. Your doctor will determine the dosage that best meets your needs. Do not change your dosage of furosemide oral tablet without your doctor’s recommendation.

Usual recommended dosages of furosemide in adults

Furosemide oral tablet is approved to treat certain swelling from fluid buildup (called edema) in adults. Specifically, the swelling must be related to congestive heart failure, cirrhosis, or kidney disease. It’s also approved to be prescribed alone or together with other drugs to treat high blood pressure in adults.

The recommended dosage of furosemide depends on the condition it’s treating and other factors. For details, see the “Dosage adjustments for furosemide” section below.

Usually, doctors start by prescribing a low dosage of furosemide oral tablet. Then, they’ll adjust it over time until the right dosage is reached. Ultimately, your doctor will prescribe the smallest dosage of furosemide oral tablet that gives the desired outcome.

Dosage for edema and other conditions

The recommended dosages for treating edema in adults are shown in the table below in milligrams (mg). A maintenance dosage is what you’ll take after your starting dosage for the remainder of your treatment. Based on your response to the medication, your doctor will determine the maintenance dosage that’s right for you.

Condition	Starting dosage	Maintenance dosage	Maximum dosage
edema related to congestive heart failure, cirrhosis, or kidney disease	20–80 mg one time	• based on individual needs • usually to be taken once or twice per day	600 mg once or twice per day as prescribed following dosage increases over time
high blood pressure*	40 mg twice per day	based on individual needs	based on individual needs

* Doctors may prescribe furosemide oral tablet to be taken alone or together with other drugs for this condition.

Dosages of furosemide in children

Furosemide oral tablet is approved to treat certain swelling from fluid buildup (called edema) in children ages 0–17 years. Specifically, the swelling must be related to congestive heart failure, cirrhosis, or kidney disease.

Your child’s doctor will use your child’s body weight in kilograms (kg) to calculate the dosage. For reference, 1 kg is about 2.2 pounds (lb). A maintenance dosage is what your child will take after the starting dosage for the remainder of their treatment. Your child’s doctor will determine the right maintenance dosage based on your child’s response to the medication.

The recommended dosages for treating edema in children are shown in the table below in mg per kg. This is shown as mg/kg.

Condition	Starting dosage	Maintenance dosage	Maximum dosage
edema related to congestive heart failure, cirrhosis, or kidney disease	2 mg/kg of body weight one time	based on individual needs	6 mg/kg of body weight per dose, taken once or twice per day as prescribed

For a dosage example, assume a doctor prescribes furosemide oral tablet for a child weighing 40 kg. This is about 88 lb. The child’s starting dosage would be 80 mg.

Your child’s doctor can provide more information about the dosage of furosemide oral tablet for children. If needed, they can also discuss whether another form of furosemide might be suitable for your child.

Dosage adjustments for furosemide

Your doctor will prescribe a dosage of furosemide oral tablet based on several factors. These include:

the specific condition being treated and how severe it is
your age
your child’s weight
how your body responds to the first dose
other health conditions you may have

Missed dose of furosemide

Talk with your doctor or pharmacist right away if you realize you forgot to take a dose of furosemide oral tablet. They may advise you to take the missed dose. Or they may advise you to skip it and take your next dose as scheduled.

For tips on how to plan your doses of furosemide oral tablet and avoid missing a dose, read this article. You could also try:

downloading a reminder app on your phone
setting an alarm
putting a note where you’ll see it, such as on your calendar, bathroom mirror, or bedside table

Frequently asked questions

Below are answers to some commonly asked questions about furosemide oral tablet and its dosage.

How will I know whether my dose of furosemide isn’t working?

You might be taking furosemide for certain swelling from fluid buildup (called edema). If so, you might notice it’s not working if you have worsened swelling in your body. That could mean it isn’t working for you at a certain dosage.

Increased swelling may lead to other problems. These can include pain, infections, blood clots, and long lasting leg ulcers (sores).

Or you might be taking furosemide oral tablet for high blood pressure. If so, you may not readily notice whether it’s not working for you at a certain dosage.

High blood pressure can raise your risk of heart attack or stroke. With high blood pressure, symptoms aren’t always present. So, consider monitoring your blood pressure regularly during your treatment.

Some symptoms of severe high blood pressure include:

dizziness
flushing
spots of blood in the eyes

Your doctor will help you monitor whether furosemide is working to treat your condition.

Is furosemide taken long term?

Furosemide oral tablet can be taken long term or short term, depending on the condition it’s treating. You and your doctor can determine whether it’s safe and effective for your condition. Then, your doctor will recommend how long you should take it.

If you have questions about how long you should take furosemide oral tablet, talk with your doctor.

How furosemide is taken

You’ll swallow furosemide oral tablet once or twice per day depending on your treatment plan. You can take it with or without food.

Your doctor may advise that you take this medication around the same time each day. This helps keep a consistent amount of the drug in your body. And that can help the drug work more effectively.

If it’s hard for you to swallow tablets, view this article. It provides suggestions on how to swallow medications that come in pill form. If needed, you can chew or crush the tablet. Some furosemide oral tablets have a score line (groove) if you need to split the tablet. You can also ask your doctor about taking the oral liquid form of furosemide.

Also, be sure to talk with your doctor or pharmacist if you’re having difficulty taking your medication. They can offer recommendations about taking it.

Furosemide coupon

Visit this page to access Optum Perks coupons and get price estimates for furosemide when you use the coupons. These coupons can provide significant savings on your prescription costs.

Note: Optum Perks coupons cannot be used with insurance copays or benefits.

Overdose of furosemide

It’s important that you do not take more furosemide oral tablet than your doctor prescribes. Doing so can lead to harmful effects.

Symptoms of furosemide overdose

Symptoms of an overdose can include:

What to do if you take too much furosemide

If you think you’ve taken too much furosemide, call your doctor or pharmacist right away. Or you could call 800-222-1222 to speak with someone at America’s Poison Centers. You can also use its online resource. If you have severe symptoms, call 911 or a local emergency number immediately. You can also go to the closest emergency room.

What to ask your doctor

This article describes the usual recommended dosages for furosemide oral tablet. If your doctor prescribes this medication, they’ll determine the dosage that’s best for you.

Do not change your dosage of furosemide oral tablet without your doctor’s recommendation. You should take furosemide oral tablet exactly as your doctor prescribes it. Let your doctor know whether you have concerns or questions about your treatment plan.

Here’s a list of some possible questions you may want to ask your doctor:

How often will my dosage of furosemide oral tablet be adjusted?
Will my dosage of furosemide oral tablet be adjusted if I’m age 65 years or older?
If I also take certain other medications, will my dosage of furosemide oral tablet need to be adjusted?

Boxed warning for furosemide

Furosemide has a boxed warning about the risk of fluid loss and electrolyte loss. A boxed warning is the most serious warning from the Food and Drug Administration (FDA).

Furosemide works to remove water from your body. It does so whether taken to treat high blood pressure or certain swelling from fluid buildup (called edema). But it has a risk of dehydration and electrolyte imbalance if too much water is removed from your body.

Due to this risk, your doctor will monitor your dose and your blood tests closely.

You can talk with your doctor to learn more about this boxed warning.

Disclaimer: Optum Perks 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 another 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.