Description and Brand Names

Drug information provided by: Micromedex

US Brand Name

  1. Furocot
  2. Lasix

Descriptions


Furosemide belongs to a group of medicines called loop diuretics (also known as water pills). Furosemide is given to help treat fluid retention (edema) and swelling that is caused by congestive heart failure, liver disease, kidney disease, or other medical conditions. It works by acting on the kidneys to increase the flow of urine.

Furosemide is also used alone or together with other medicines to treat high blood pressure (hypertension). High blood pressure adds to the workload of the heart and arteries. If it continues for a long time, the heart and arteries may not function properly. This can damage the blood vessels of the brain, heart, and kidneys, resulting in a stroke, heart failure, or kidney failure. High blood pressure may also increase the risk of heart attacks. These problems may be less likely to occur if blood pressure is controlled.

This medicine is available only with your doctor's prescription.

This product is available in the following dosage forms:

  • Tablet
  • Solution

Before Using

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For this medicine, the following should be considered:

Allergies

Tell your doctor if you have ever had any unusual or allergic reaction to this medicine or any other medicines. Also tell your health care professional if you have any other types of allergies, such as to foods, dyes, preservatives, or animals. For non-prescription products, read the label or package ingredients carefully.

Pediatric

Appropriate studies performed to date have not demonstrated pediatric-specific problems that would limit the usefulness of furosemide in children. However, premature babies are more likely to have unwanted effects on the kidney, which may require caution in patients receiving furosemide.

Geriatric

Appropriate studies performed to date have not demonstrated geriatric-specific problems that would limit the usefulness of furosemide in the elderly. However, elderly patients are more likely to have age-related liver, kidney, or heart problems, which may require caution and an adjustment in the dose for patients receiving furosemide.

Pregnancy

Information about this furosemide-oral-route
Pregnancy Category Explanation
All Trimesters C Animal studies have shown an adverse effect and there are no adequate studies in pregnant women OR no animal studies have been conducted and there are no adequate studies in pregnant women.

Breastfeeding

There are no adequate studies in women for determining infant risk when using this medication during breastfeeding. Weigh the potential benefits against the potential risks before taking this medication while breastfeeding.

Drug Interactions

Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking this medicine, it is especially important that your healthcare professional know if you are taking any of the medicines listed below. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Using this medicine with any of the following medicines is usually not recommended, but may be required in some cases. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Amikacin
  • Arsenic Trioxide
  • Bepridil
  • Chloral Hydrate
  • Cisplatin
  • Digitoxin
  • Dofetilide
  • Droperidol
  • Ethacrynic Acid
  • Gentamicin
  • Kanamycin
  • Ketanserin
  • Levomethadyl
  • Lithium
  • Metolazone
  • Neomycin
  • Netilmicin
  • Sotalol
  • Streptomycin
  • Tobramycin

Using this medicine with any of the following medicines may cause an increased risk of certain side effects, but using both drugs may be the best treatment for you. If both medicines are prescribed together, your doctor may change the dose or how often you use one or both of the medicines.

  • Aceclofenac
  • Acemetacin
  • Alacepril
  • Aliskiren
  • Amtolmetin Guacil
  • Aspirin
  • Benazepril
  • Bromfenac
  • Bufexamac
  • Captopril
  • Celecoxib
  • Cephaloridine
  • Cholestyramine
  • Choline Salicylate
  • Cilazapril
  • Clofibrate
  • Clonixin
  • Colestipol
  • Cyclosporine
  • Delapril
  • Dexibuprofen
  • Dexketoprofen
  • Dibekacin
  • Diclofenac
  • Diflunisal
  • Digoxin
  • Dipyrone
  • Enalaprilat
  • Enalapril Maleate
  • Etodolac
  • Etofenamate
  • Etoricoxib
  • Felbinac
  • Fenoprofen
  • Fepradinol
  • Feprazone
  • Floctafenine
  • Fludrocortisone
  • Flufenamic Acid
  • Flurbiprofen
  • Fosinopril
  • Germanium
  • Ginseng
  • Gossypol
  • Ibuprofen
  • Ibuprofen Lysine
  • Imidapril
  • Indomethacin
  • Ketoprofen
  • Ketorolac
  • Licorice
  • Lisinopril
  • Lornoxicam
  • Loxoprofen
  • Lumiracoxib
  • Meclofenamate
  • Mefenamic Acid
  • Meloxicam
  • Moexipril
  • Morniflumate
  • Nabumetone
  • Naproxen
  • Nepafenac
  • Niflumic Acid
  • Nimesulide
  • Oxaprozin
  • Oxyphenbutazone
  • Pancuronium
  • Parecoxib
  • Pentopril
  • Perindopril
  • Phenylbutazone
  • Piketoprofen
  • Piroxicam
  • Pranoprofen
  • Proglumetacin
  • Propyphenazone
  • Proquazone
  • Quinapril
  • Ramipril
  • Rofecoxib
  • Salicylic Acid
  • Salsalate
  • Sodium Salicylate
  • Spirapril
  • Sulindac
  • Temocapril
  • Tenoxicam
  • Tiaprofenic Acid
  • Tolfenamic Acid
  • Tolmetin
  • Trandolapril
  • Tubocurarine
  • Valdecoxib
  • Vecuronium
  • Zofenopril

Other Interactions

Certain medicines should not be used at or around the time of eating food or eating certain types of food since interactions may occur. Using alcohol or tobacco with certain medicines may also cause interactions to occur. The following interactions have been selected on the basis of their potential significance and are not necessarily all-inclusive.

Other Medical Problems

The presence of other medical problems may affect the use of this medicine. Make sure you tell your doctor if you have any other medical problems, especially:

  • Allergy to sulfa drugs (e.g., sulfamethoxazole, sulfasalazine, sulfisoxazole, Azulfidine®, Bactrim®, Gantrisin®, or Septra®) or
  • Anemia or
  • Bladder problem with urinating or
  • Dehydration or
  • Diabetes mellitus or
  • Gout or
  • Hearing problems or
  • Hyperuricemia (high uric acid in the blood) or
  • Hypocalcemia (low calcium in the blood) or
  • Hypochloremic alkalosis (low chlorine in the blood) or
  • Hypokalemia (low potassium in the blood) or
  • Hypomagnesemia (low magnesium in the blood) or
  • Hyponatremia (low sodium in the blood) or
  • Hypotension (low blood pressure) or
  • Hypovolemia (low blood volume) or
  • Liver disease, severe (e.g., cirrhosis) or
  • Systemic lupus erythematosus (SLE) or
  • Tinnitus (ringing in the ears) or
  • Trouble urinating (caused by bladder emptying disorders, enlarged prostate, narrow urethra)—Use with caution. May make these conditions worse.
  • Anuria (not able to pass urine)—Should not be used in patients with this condition. .
  • Hypoproteinemia (low protein in the blood) from a kidney problem or
  • Radiocontrast nephropathy (kidney problem)—May cause side effects to become worse.
  • Kidney disease, severe—Use with caution. The effects may be increased because of slower removal of the medicine from the body.

Proper Use

Take this medicine exactly as directed by your doctor to benefit your condition as much as possible. Do not take more of it, do not take it more often, and do not take it for a longer time than your doctor ordered.

Many patients who have high blood pressure will not notice any symptoms of the condition. In fact, most patients feel normal. It is very important that you take your medicine exactly as directed and that you keep your appointments with your doctor even if you feel well.

In addition to using this medicine, treatment of your high blood pressure may include weight control and changes in the types of foods you eat, especially foods high in sodium (salt) or potassium. Your doctor will tell you which of these are most important for you. You should check with your doctor before changing your diet.

This medicine will not cure your high blood pressure, but it does help control it. You must continue to take it as directed if you expect to lower your blood pressure and keep it down. You might have to take high blood pressure medicine for the rest of your life. If high blood pressure is not treated, it can cause serious problems such as heart failure, blood vessel disease, strokes, or kidney disease.

Measure the oral liquid with a marked measuring spoon, oral syringe, or medicine cup.

If you are taking sucralfate (Carafate®), take this medicine 2 hours before or 2 hours after taking furosemide. It may keep furosemide from working properly.

Dosing

The dose of this medicine will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of this medicine. If your dose is different, do not change it unless your doctor tells you to do so.

The amount of medicine that you take depends on the strength of the medicine. Also, the number of doses you take each day, the time allowed between doses, and the length of time you take the medicine depend on the medical problem for which you are using the medicine.

  • For oral dosage forms (oral solution or tablets):
    • For edema:
      • Adults—At first, 20 to 80 milligrams (mg) once a day as a single dose or divided and given twice per day. Your doctor may adjust your dose as needed.
      • Children—Dose is based on body weight and must be determined by your doctor. The starting dose is usually 2 milligrams (mg) per kilogram (kg) of body weight per day as a single dose. Your doctor may adjust your dose as needed. However, the dose is usually not more than 6 mg per kg of body weight per day.
    • For high blood pressure:
      • Adults—At first, 40 milligrams (mg) two times per day. Your doctor may adjust your dose as needed.
      • Children—Use and dose must be determined by your doctor.

Missed Dose

If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage

Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Keep from freezing.

Keep out of the reach of children.

Do not keep outdated medicine or medicine no longer needed.

Ask your healthcare professional how you should dispose of any medicine you do not use.

Precautions

It is very important that your doctor check the progress of you or your child at regular visits to make sure this medicine is working properly. Blood or urine tests may be needed to check for unwanted effects.

Using this medicine while you are pregnant may cause your unborn baby to be bigger than normal. If you think you have become pregnant while using this medicine, tell your doctor right away.

This medicine may cause you or your child to lose more potassium from your body than normal (hypokalemia). This is more likely to occur if you have liver disease (e.g., cirrhosis), or if you are using this medicine together with steroids (cortisone-like medicines), adrenocorticotropic hormone (ACTH), large amounts of licorice, or laxatives for a long time. Tell your doctor if you become sick with severe or continuing nausea, vomiting, or diarrhea, and drink fluids to prevent getting dehydrated. Check with your doctor right away if you have dry mouth, increased thirst, muscle cramps, or nausea or vomiting.

Dizziness, lightheadedness, or fainting may occur, especially when you get up suddenly from a lying or sitting position. Getting up slowly may help. If the problem continues or gets worse, check with your doctor.

Stop using this medicine and check with your doctor right away if you have a sudden decrease in hearing or loss of hearing. You may also have dizziness or ringing in the ears. Tell your doctor if you have a feeling of constant movement of self or surroundings or a sensation of spinning.

This medicine may cause an increase in blood sugar levels. If you are diabetic and notice a change in the results of your blood or urine sugar tests, check with your doctor.

This medicine may make your skin more sensitive to sunlight. Use a sunscreen, hat, and protective clothing when you are outdoors. Avoid sunlamps and tanning beds.

Make sure any doctor or dentist who treats you knows that you are using this medicine. This medicine may affect the results of certain medical tests.

Do not take other medicines unless they have been discussed with your doctor. This especially includes prescription or nonprescription (over-the-counter) medicines for appetite control, asthma, colds, cough, hay fever, or sinus problems.

Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

Rare

  1. Chest pain
  2. chills
  3. cough or hoarseness
  4. fever
  5. general feeling of tiredness or weakness
  6. headache
  7. lower back or side pain
  8. painful or difficult urination
  9. shortness of breath
  10. sore throat
  11. sores, ulcers, or white spots on the lips or in the mouth
  12. swollen or painful glands
  13. tightness in the chest
  14. unusual bleeding or bruising
  15. unusual tiredness or weakness
  16. wheezing

Incidence not known

  1. Back or leg pains
  2. black, tarry stools
  3. bleeding gums
  4. blistering, peeling, or loosening of the skin
  5. bloating
  6. blood in the urine or stools
  7. blurred vision
  8. burning, crawling, itching, numbness, prickling, "pins and needles", or tingling feelings
  9. changes in skin color, pain, tenderness, or swelling of the foot or leg
  10. clay-colored stools
  11. cloudy urine
  12. cold sweats
  13. confusion
  14. constipation
  15. continuing ringing or buzzing or other unexplained noise in the ears
  16. coughing up blood
  17. cracks in the skin
  18. darkened urine
  19. diarrhea
  20. difficulty breathing
  21. dizziness, faintness, or lightheadedness when getting up from a lying or sitting position
  22. dry mouth
  23. fast heartbeat
  24. flushed, dry skin
  25. fruit-like breath odor
  26. greatly decreased frequency of urination or amount of urine
  27. hearing loss
  28. increased hunger
  29. increased thirst
  30. indigestion
  31. itching
  32. loss of appetite
  33. nausea or vomiting
  34. nosebleeds
  35. pain in the joints or muscles
  36. pains in the stomach, side, or abdomen, possibly radiating to the back
  37. pale skin
  38. pinpoint red spots on the skin
  39. red, irritated eyes
  40. red, swollen skin
  41. skin rash
  42. spots on your skin resembling a blister or pimple
  43. sweating
  44. swelling of the feet or lower legs
  45. trouble breathing with exertion
  46. unusual weight loss
  47. vomiting of blood
  48. yellow eyes or skin

Get emergency help immediately if any of the following symptoms of overdose occur:

Symptoms of overdose

  1. Decreased urination
  2. drowsiness
  3. increase in heart rate
  4. irregular heartbeat
  5. irritability
  6. mood changes
  7. muscle cramps
  8. numbness, tingling, pain, or weakness in the hands, feet, or lips
  9. rapid breathing
  10. seizures
  11. sunken eyes
  12. thirst
  13. trembling
  14. weak pulse
  15. weakness and heaviness of the legs
  16. wrinkled skin

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

Incidence not known

  1. Feeling of constant movement of self or surroundings
  2. hives or welts
  3. increased sensitivity of the skin to sunlight
  4. muscle spasm
  5. redness or other discoloration of the skin
  6. restlessness
  7. sensation of spinning
  8. severe sunburn
  9. weakness

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.