What is Lasix: Uses, Warnings & Interactions

Updated Jan 13, 2021  •  Published Dec 30, 2020

Lasix overview

BRAND NAMES:

  • Lasix, Diuscreen Multi-Drug Medicated Test Kit, Lasix, RX-Specimen Collection Kit, Specimen Collection Kit, Urinx Medicated Specimen Collection Package

Generic Names:

  • Furosemide

Uses:

  • Treats fluid retention (edema) and high blood pressure. This medicine is a diuretic (water pill).

Therapeutic Classes:

  • Cardiovascular Agent

Forms:

  • Liquid, Tablet

How it’s taken:

  • By mouth

What form(s) does Lasix come in

  • Liquid

  • Tablet

What are common Lasix doses?

  • Tablet 20MG

  • Tablet 40MG

  • Tablet 80MG

Common Lasix prescriptions

  • Lasix
    100 tablets bottle

  • Lasix
    20mg tablet

  • Lasix
    40mg tablet

  • Lasix
    80mg tablet

How to take Lasix

  • Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.

  • You may take this medicine with food if it upsets your stomach.

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

  • Tablet: Swallow the tablet whole. Do not crush, break, or chew it.

  • Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

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

  • Take your medicine as directed. Your dose may need to be changed several times to find what works best for you.

  • Tablet: Swallow the tablet whole. Do not crush, break, or chew it.

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

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

  • Missed dose: Take a dose as soon as you remember. If it is almost time for your next dose, wait until then and take a regular dose. Do not take extra medicine to make up for a missed dose.

  • You may take this medicine with food if it upsets your stomach.

Lasix contraindications

  • This medicine is not right for everyone. Do not use it if you had an allergic reaction to furosemide.

Lasix warnings

  • Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease (including cirrhosis), diabetes, gout, low blood pressure, lupus, an enlarged prostate, trouble urinating, or an allergy to sulfa drugs. Tell your doctor if you are on a low-salt diet.

  • This medicine may cause the following problems: Low levels of minerals in your blood, such as potassium and sodiumBlood sugar level changesHearing problems

  • Make sure any doctor or dentist who treats you knows that you are using this medicine.

  • This medicine could lower your blood pressure too much, especially when you first use it or if you are dehydrated. Stand or sit up slowly if you feel lightheaded or dizzy.

  • This medicine may make your skin more sensitive to sunlight. Wear sunscreen. Do not use sunlamps or tanning beds.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

  • Severe diarrhea

  • Unusual bleeding or bruising

  • Yellow skin or eyes

Lasix interactions

  • Some medicines can affect how furosemide works. Tell your doctor if you are also using any of the following:Cisplatin, cyclosporine, digoxin, ethacrynic acid, licorice, lithium, methotrexate, or phenytoinAdrenocorticotropic hormone (ACTH)LaxativeMedicine to treat an infectionNSAID pain or arthritis medicine (including aspirin, diclofenac, ibuprofen, indomethacin, naproxen)Other blood pressure medicinesSteroid medicine (including dexamethasone, hydrocortisone, methylprednisolone, prednisolone, prednisone)Thyroid medicine

  • If you also take sucralfate, allow at least 2 hours between the time you take furosemide and the time you take sucralfate.

  • Alcohol, narcotic pain medicine, or sleeping pills may cause you to feel more lightheaded, dizzy, or faint when used with this medicine.

  • This medicine could lower your blood pressure too much, especially when you first use it or if you are dehydrated. Stand or sit up slowly if you feel lightheaded or dizzy.

  • This medicine may make your skin more sensitive to sunlight. Wear sunscreen. Do not use sunlamps or tanning beds.

  • Your doctor will do lab tests at regular visits to check on the effects of this medicine. Keep all appointments.

  • Keep all medicine out of the reach of children. Never share your medicine with anyone.

Lasix side effects

Serious Side Effects

  • Lightheadedness, dizziness, fainting

  • Yellow skin or eyes

  • Unusual bleeding or bruising

  • Confusion, weakness, muscle twitching

  • Hearing loss, ringing in the ears

  • Dry mouth, increased thirst, muscle cramps, uneven heartbeat

  • Severe diarrhea

  • Sudden and severe stomach pain, nausea, vomiting, fever, lightheadedness

  • Blistering, peeling, red skin rash

  • Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing

Less Serious Side Effects

  • Loss of appetite, stomach cramps